mirror of https://github.com/Cisco-Talos/clamav
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
5443 lines
172 KiB
5443 lines
172 KiB
/*
|
|
* Copyright (C) 2015 Cisco Systems, Inc. and/or its affiliates. All rights reserved.
|
|
* Copyright (C) 2007-2008 Sourcefire, Inc.
|
|
*
|
|
* Authors: Alberto Wu, Tomasz Kojm
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
|
|
* MA 02110-1301, USA.
|
|
*/
|
|
|
|
#if HAVE_CONFIG_H
|
|
#include "clamav-config.h"
|
|
#endif
|
|
|
|
/*
|
|
#define _XOPEN_SOURCE 500
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
|
|
#if HAVE_STRING_H
|
|
#include <string.h>
|
|
#endif
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/stat.h>
|
|
#include <fcntl.h>
|
|
#ifdef HAVE_UNISTD_H
|
|
#include <unistd.h>
|
|
#endif
|
|
#include <time.h>
|
|
#include <stdarg.h>
|
|
|
|
#include "cltypes.h"
|
|
#include "clamav.h"
|
|
#include "others.h"
|
|
#include "pe.h"
|
|
#include "petite.h"
|
|
#include "fsg.h"
|
|
#include "spin.h"
|
|
#include "upx.h"
|
|
#include "yc.h"
|
|
#include "aspack.h"
|
|
#include "wwunpack.h"
|
|
#include "unsp.h"
|
|
#include "scanners.h"
|
|
#include "str.h"
|
|
#include "execs.h"
|
|
#include "mew.h"
|
|
#include "upack.h"
|
|
#include "matcher.h"
|
|
#include "matcher-hash.h"
|
|
#include "disasm.h"
|
|
#include "special.h"
|
|
#include "ishield.h"
|
|
#include "asn1.h"
|
|
|
|
#include "json_api.h"
|
|
|
|
#define DCONF ctx->dconf->pe
|
|
|
|
#define PE_IMAGE_DOS_SIGNATURE 0x5a4d /* MZ */
|
|
#define PE_IMAGE_DOS_SIGNATURE_OLD 0x4d5a /* ZM */
|
|
#define PE_IMAGE_NT_SIGNATURE 0x00004550
|
|
#define PE32_SIGNATURE 0x010b
|
|
#define PE32P_SIGNATURE 0x020b
|
|
|
|
#define optional_hdr64 pe_opt.opt64
|
|
#define optional_hdr32 pe_opt.opt32
|
|
|
|
#define UPX_NRV2B "\x11\xdb\x11\xc9\x01\xdb\x75\x07\x8b\x1e\x83\xee\xfc\x11\xdb\x11\xc9\x11\xc9\x75\x20\x41\x01\xdb"
|
|
#define UPX_NRV2D "\x83\xf0\xff\x74\x78\xd1\xf8\x89\xc5\xeb\x0b\x01\xdb\x75\x07\x8b\x1e\x83\xee\xfc\x11\xdb\x11\xc9"
|
|
#define UPX_NRV2E "\xeb\x52\x31\xc9\x83\xe8\x03\x72\x11\xc1\xe0\x08\x8a\x06\x46\x83\xf0\xff\x74\x75\xd1\xf8\x89\xc5"
|
|
#define UPX_LZMA1 "\x56\x83\xc3\x04\x53\x50\xc7\x03\x03\x00\x02\x00\x90\x90\x90\x55\x57\x56\x53\x83"
|
|
#define UPX_LZMA2 "\x56\x83\xc3\x04\x53\x50\xc7\x03\x03\x00\x02\x00\x90\x90\x90\x90\x90\x55\x57\x56"
|
|
|
|
#define EC32(x) ((uint32_t)cli_readint32(&(x))) /* Convert little endian to host */
|
|
#define EC16(x) ((uint16_t)cli_readint16(&(x)))
|
|
/* lower and upper bondary alignment (size vs offset) */
|
|
#define PEALIGN(o,a) (((a))?(((o)/(a))*(a)):(o))
|
|
#define PESALIGN(o,a) (((a))?(((o)/(a)+((o)%(a)!=0))*(a)):(o))
|
|
|
|
#define CLI_UNPSIZELIMITS(NAME,CHK) \
|
|
if(cli_checklimits(NAME, ctx, (CHK), 0, 0)!=CL_CLEAN) { \
|
|
free(exe_sections); \
|
|
return CL_CLEAN; \
|
|
}
|
|
|
|
#define CLI_UNPTEMP(NAME,FREEME) \
|
|
if(!(tempfile = cli_gentemp(ctx->engine->tmpdir))) { \
|
|
cli_multifree FREEME; \
|
|
return CL_EMEM; \
|
|
} \
|
|
if((ndesc = open(tempfile, O_RDWR|O_CREAT|O_TRUNC|O_BINARY, S_IRWXU)) < 0) { \
|
|
cli_dbgmsg(NAME": Can't create file %s\n", tempfile); \
|
|
free(tempfile); \
|
|
cli_multifree FREEME; \
|
|
return CL_ECREAT; \
|
|
}
|
|
|
|
#define CLI_TMPUNLK() if(!ctx->engine->keeptmp) { \
|
|
if (cli_unlink(tempfile)) { \
|
|
free(tempfile); \
|
|
return CL_EUNLINK; \
|
|
} \
|
|
}
|
|
|
|
#ifdef HAVE__INTERNAL__SHA_COLLECT
|
|
#define SHA_OFF do { ctx->sha_collect = -1; } while(0)
|
|
#define SHA_RESET do { ctx->sha_collect = sha_collect; } while(0)
|
|
#else
|
|
#define SHA_OFF do {} while(0)
|
|
#define SHA_RESET do {} while(0)
|
|
#endif
|
|
|
|
#define FSGCASE(NAME,FREESEC) \
|
|
case 0: /* Unpacked and NOT rebuilt */ \
|
|
cli_dbgmsg(NAME": Successfully decompressed\n"); \
|
|
close(ndesc); \
|
|
if (cli_unlink(tempfile)) { \
|
|
free(exe_sections); \
|
|
free(tempfile); \
|
|
FREESEC; \
|
|
return CL_EUNLINK; \
|
|
} \
|
|
free(tempfile); \
|
|
FREESEC; \
|
|
found = 0; \
|
|
upx_success = 1; \
|
|
break; /* FSG ONLY! - scan raw data after upx block */
|
|
|
|
#define SPINCASE() \
|
|
case 2: \
|
|
free(spinned); \
|
|
close(ndesc); \
|
|
if (cli_unlink(tempfile)) { \
|
|
free(exe_sections); \
|
|
free(tempfile); \
|
|
return CL_EUNLINK; \
|
|
} \
|
|
cli_dbgmsg("PESpin: Size exceeded\n"); \
|
|
free(tempfile); \
|
|
break; \
|
|
|
|
#define CLI_UNPRESULTS_(NAME,FSGSTUFF,EXPR,GOOD,FREEME) \
|
|
switch(EXPR) { \
|
|
case GOOD: /* Unpacked and rebuilt */ \
|
|
if(ctx->engine->keeptmp) \
|
|
cli_dbgmsg(NAME": Unpacked and rebuilt executable saved in %s\n", tempfile); \
|
|
else \
|
|
cli_dbgmsg(NAME": Unpacked and rebuilt executable\n"); \
|
|
cli_multifree FREEME; \
|
|
free(exe_sections); \
|
|
lseek(ndesc, 0, SEEK_SET); \
|
|
cli_dbgmsg("***** Scanning rebuilt PE file *****\n"); \
|
|
SHA_OFF; \
|
|
if(cli_magic_scandesc(ndesc, ctx) == CL_VIRUS) { \
|
|
close(ndesc); \
|
|
CLI_TMPUNLK(); \
|
|
free(tempfile); \
|
|
SHA_RESET; \
|
|
return CL_VIRUS; \
|
|
} \
|
|
SHA_RESET; \
|
|
close(ndesc); \
|
|
CLI_TMPUNLK(); \
|
|
free(tempfile); \
|
|
return CL_CLEAN; \
|
|
\
|
|
FSGSTUFF; \
|
|
\
|
|
default: \
|
|
cli_dbgmsg(NAME": Unpacking failed\n"); \
|
|
close(ndesc); \
|
|
if (cli_unlink(tempfile)) { \
|
|
free(exe_sections); \
|
|
free(tempfile); \
|
|
cli_multifree FREEME; \
|
|
return CL_EUNLINK; \
|
|
} \
|
|
cli_multifree FREEME; \
|
|
free(tempfile); \
|
|
}
|
|
|
|
|
|
#define CLI_UNPRESULTS(NAME,EXPR,GOOD,FREEME) CLI_UNPRESULTS_(NAME,(void)0,EXPR,GOOD,FREEME)
|
|
#define CLI_UNPRESULTSFSG1(NAME,EXPR,GOOD,FREEME) CLI_UNPRESULTS_(NAME,FSGCASE(NAME,free(sections)),EXPR,GOOD,FREEME)
|
|
#define CLI_UNPRESULTSFSG2(NAME,EXPR,GOOD,FREEME) CLI_UNPRESULTS_(NAME,FSGCASE(NAME,(void)0),EXPR,GOOD,FREEME)
|
|
|
|
#define DETECT_BROKEN_PE (DETECT_BROKEN && !ctx->corrupted_input)
|
|
|
|
extern const unsigned int hashlen[];
|
|
|
|
struct offset_list {
|
|
uint32_t offset;
|
|
struct offset_list *next;
|
|
};
|
|
|
|
struct pe_image_import_descriptor {
|
|
union {
|
|
uint32_t Characteristics;
|
|
uint32_t OriginalFirstThunk;
|
|
} u;
|
|
uint32_t TimeDateStamp;
|
|
uint32_t ForwarderChain;
|
|
uint32_t Name;
|
|
uint32_t FirstThunk;
|
|
};
|
|
|
|
#define IMAGE_ORDINAL_FLAG32 0x80000000
|
|
#define IMAGE_ORDINAL_FLAG64 0x8000000000000000L
|
|
|
|
struct pe_image_thunk32 {
|
|
union {
|
|
uint32_t ForwarderString;
|
|
uint32_t Function;
|
|
uint32_t Ordinal;
|
|
uint32_t AddressOfData;
|
|
} u;
|
|
};
|
|
|
|
struct pe_image_thunk64 {
|
|
union {
|
|
uint64_t ForwarderString;
|
|
uint64_t Function;
|
|
uint64_t Ordinal;
|
|
uint64_t AddressOfData;
|
|
} u;
|
|
};
|
|
|
|
struct pe_image_import_by_name {
|
|
uint16_t Hint;
|
|
uint8_t Name[1];
|
|
};
|
|
|
|
static void cli_multifree(void *f, ...) {
|
|
void *ff;
|
|
va_list ap;
|
|
free(f);
|
|
va_start(ap, f);
|
|
while((ff=va_arg(ap, void*))) free(ff);
|
|
va_end(ap);
|
|
}
|
|
|
|
struct vinfo_list {
|
|
uint32_t rvas[16];
|
|
unsigned int count;
|
|
};
|
|
|
|
static int versioninfo_cb(void *opaque, uint32_t type, uint32_t name, uint32_t lang, uint32_t rva) {
|
|
struct vinfo_list *vlist = (struct vinfo_list *)opaque;
|
|
|
|
cli_dbgmsg("versioninfo_cb: type: %x, name: %x, lang: %x, rva: %x\n", type, name, lang, rva);
|
|
vlist->rvas[vlist->count] = rva;
|
|
if(++vlist->count == sizeof(vlist->rvas) / sizeof(vlist->rvas[0]))
|
|
return 1;
|
|
return 0;
|
|
}
|
|
|
|
|
|
uint32_t cli_rawaddr(uint32_t rva, const struct cli_exe_section *shp, uint16_t nos, unsigned int *err, size_t fsize, uint32_t hdr_size)
|
|
{
|
|
int i, found = 0;
|
|
uint32_t ret;
|
|
|
|
if (rva<hdr_size) { /* Out of section EP - mapped to imagebase+rva */
|
|
if (rva >= fsize) {
|
|
*err=1;
|
|
return 0;
|
|
}
|
|
|
|
*err=0;
|
|
return rva;
|
|
}
|
|
|
|
for(i = nos-1; i >= 0; i--) {
|
|
if(shp[i].rsz && shp[i].rva <= rva && shp[i].rsz > rva - shp[i].rva) {
|
|
found = 1;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if(!found) {
|
|
*err = 1;
|
|
return 0;
|
|
}
|
|
|
|
ret = rva - shp[i].rva + shp[i].raw;
|
|
*err = 0;
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
void findres(uint32_t by_type, uint32_t by_name, uint32_t res_rva, cli_ctx *ctx, struct cli_exe_section *exe_sections, uint16_t nsections, uint32_t hdr_size, int (*cb)(void *, uint32_t, uint32_t, uint32_t, uint32_t), void *opaque)
|
|
callback based res lookup
|
|
|
|
by_type: lookup type
|
|
by_name: lookup name or (unsigned)-1 to look for any name
|
|
res_rva: base resource rva (i.e. dirs[2].VirtualAddress)
|
|
ctx, exe_sections, nsections, hdr_size: same as in scanpe
|
|
cb: the callback function executed on each successful match
|
|
opaque: an opaque pointer passed to the callback
|
|
|
|
the callback proto is
|
|
int pe_res_cballback (void *opaque, uint32_t type, uint32_t name, uint32_t lang, uint32_t rva);
|
|
the callback shall return 0 to continue the lookup or 1 to abort
|
|
*/
|
|
void findres(uint32_t by_type, uint32_t by_name, uint32_t res_rva, fmap_t *map, struct cli_exe_section *exe_sections, uint16_t nsections, uint32_t hdr_size, int (*cb)(void *, uint32_t, uint32_t, uint32_t, uint32_t), void *opaque) {
|
|
unsigned int err = 0;
|
|
uint32_t type, type_offs, name, name_offs, lang, lang_offs;
|
|
const uint8_t *resdir, *type_entry, *name_entry, *lang_entry ;
|
|
uint16_t type_cnt, name_cnt, lang_cnt;
|
|
|
|
if (!(resdir = fmap_need_off_once(map, cli_rawaddr(res_rva, exe_sections, nsections, &err, map->len, hdr_size), 16)) || err)
|
|
return;
|
|
|
|
type_cnt = (uint16_t)cli_readint16(resdir+12);
|
|
type_entry = resdir+16;
|
|
if(!(by_type>>31)) {
|
|
type_entry += type_cnt * 8;
|
|
type_cnt = (uint16_t)cli_readint16(resdir+14);
|
|
}
|
|
|
|
while(type_cnt--) {
|
|
if(!fmap_need_ptr_once(map, type_entry, 8))
|
|
return;
|
|
type = cli_readint32(type_entry);
|
|
type_offs = cli_readint32(type_entry+4);
|
|
if(type == by_type && (type_offs>>31)) {
|
|
type_offs &= 0x7fffffff;
|
|
if (!(resdir = fmap_need_off_once(map, cli_rawaddr(res_rva + type_offs, exe_sections, nsections, &err, map->len, hdr_size), 16)) || err)
|
|
return;
|
|
|
|
name_cnt = (uint16_t)cli_readint16(resdir+12);
|
|
name_entry = resdir+16;
|
|
if(by_name == 0xffffffff)
|
|
name_cnt += (uint16_t)cli_readint16(resdir+14);
|
|
else if(!(by_name>>31)) {
|
|
name_entry += name_cnt * 8;
|
|
name_cnt = (uint16_t)cli_readint16(resdir+14);
|
|
}
|
|
while(name_cnt--) {
|
|
if(!fmap_need_ptr_once(map, name_entry, 8))
|
|
return;
|
|
name = cli_readint32(name_entry);
|
|
name_offs = cli_readint32(name_entry+4);
|
|
if((by_name == 0xffffffff || name == by_name) && (name_offs>>31)) {
|
|
name_offs &= 0x7fffffff;
|
|
if (!(resdir = fmap_need_off_once(map, cli_rawaddr(res_rva + name_offs, exe_sections, nsections, &err, map->len, hdr_size), 16)) || err)
|
|
return;
|
|
|
|
lang_cnt = (uint16_t)cli_readint16(resdir+12) + (uint16_t)cli_readint16(resdir+14);
|
|
lang_entry = resdir+16;
|
|
while(lang_cnt--) {
|
|
if(!fmap_need_ptr_once(map, lang_entry, 8))
|
|
return;
|
|
lang = cli_readint32(lang_entry);
|
|
lang_offs = cli_readint32(lang_entry+4);
|
|
if(!(lang_offs >>31)) {
|
|
if(cb(opaque, type, name, lang, res_rva + lang_offs))
|
|
return;
|
|
}
|
|
lang_entry += 8;
|
|
}
|
|
}
|
|
name_entry += 8;
|
|
}
|
|
return; /* FIXME: unless we want to find ALL types */
|
|
}
|
|
type_entry += 8;
|
|
}
|
|
}
|
|
|
|
static void cli_parseres_special(uint32_t base, uint32_t rva, fmap_t *map, struct cli_exe_section *exe_sections, uint16_t nsections, size_t fsize, uint32_t hdr_size, unsigned int level, uint32_t type, unsigned int *maxres, struct swizz_stats *stats) {
|
|
unsigned int err = 0, i;
|
|
const uint8_t *resdir;
|
|
const uint8_t *entry, *oentry;
|
|
uint16_t named, unnamed;
|
|
uint32_t rawaddr = cli_rawaddr(rva, exe_sections, nsections, &err, fsize, hdr_size);
|
|
uint32_t entries;
|
|
|
|
if(level>2 || !*maxres) return;
|
|
*maxres-=1;
|
|
if(err || !(resdir = fmap_need_off_once(map, rawaddr, 16)))
|
|
return;
|
|
named = (uint16_t)cli_readint16(resdir+12);
|
|
unnamed = (uint16_t)cli_readint16(resdir+14);
|
|
|
|
entries = /*named+*/unnamed;
|
|
if (!entries)
|
|
return;
|
|
rawaddr += named*8; /* skip named */
|
|
/* this is just used in a heuristic detection, so don't give error on failure */
|
|
if(!(entry = fmap_need_off(map, rawaddr+16, entries*8))) {
|
|
cli_dbgmsg("cli_parseres_special: failed to read resource directory at:%lu\n", (unsigned long)rawaddr+16);
|
|
return;
|
|
}
|
|
oentry = entry;
|
|
/*for (i=0; i<named; i++) {
|
|
uint32_t id, offs;
|
|
id = cli_readint32(entry);
|
|
offs = cli_readint32(entry+4);
|
|
if(offs>>31)
|
|
cli_parseres( base, base + (offs&0x7fffffff), srcfd, exe_sections, nsections, fsize, hdr_size, level+1, type, maxres, stats);
|
|
entry+=8;
|
|
}*/
|
|
for (i=0; i<unnamed; i++, entry += 8) {
|
|
uint32_t id, offs;
|
|
if (stats->errors >= SWIZZ_MAXERRORS) {
|
|
cli_dbgmsg("cli_parseres_special: resources broken, ignoring\n");
|
|
return;
|
|
}
|
|
id = cli_readint32(entry)&0x7fffffff;
|
|
if(level==0) {
|
|
type = 0;
|
|
switch(id) {
|
|
case 4: /* menu */
|
|
case 5: /* dialog */
|
|
case 6: /* string */
|
|
case 11:/* msgtable */
|
|
type = id;
|
|
break;
|
|
case 16:
|
|
type = id;
|
|
/* 14: version */
|
|
stats->has_version = 1;
|
|
break;
|
|
case 24: /* manifest */
|
|
stats->has_manifest = 1;
|
|
break;
|
|
/* otherwise keep it 0, we don't want it */
|
|
}
|
|
}
|
|
if (!type) {
|
|
/* if we are not interested in this type, skip */
|
|
continue;
|
|
}
|
|
offs = cli_readint32(entry+4);
|
|
if(offs>>31)
|
|
cli_parseres_special(base, base + (offs&0x7fffffff), map, exe_sections, nsections, fsize, hdr_size, level+1, type, maxres, stats);
|
|
else {
|
|
offs = cli_readint32(entry+4);
|
|
rawaddr = cli_rawaddr(base + offs, exe_sections, nsections, &err, fsize, hdr_size);
|
|
if (!err && (resdir = fmap_need_off_once(map, rawaddr, 16))) {
|
|
uint32_t isz = cli_readint32(resdir+4);
|
|
const uint8_t *str;
|
|
rawaddr = cli_rawaddr(cli_readint32(resdir), exe_sections, nsections, &err, fsize, hdr_size);
|
|
if (err || !isz || isz >= fsize || rawaddr+isz >= fsize) {
|
|
cli_dbgmsg("cli_parseres_special: invalid resource table entry: %lu + %lu\n",
|
|
(unsigned long)rawaddr,
|
|
(unsigned long)isz);
|
|
stats->errors++;
|
|
continue;
|
|
}
|
|
if ((id&0xff) != 0x09) /* english res only */
|
|
continue;
|
|
if((str = fmap_need_off_once(map, rawaddr, isz)))
|
|
cli_detect_swizz_str(str, isz, stats, type);
|
|
}
|
|
}
|
|
}
|
|
fmap_unneed_ptr(map, oentry, entries*8);
|
|
}
|
|
|
|
static unsigned int cli_hashsect(fmap_t *map, struct cli_exe_section *s, unsigned char **digest, int * foundhash, int * foundwild)
|
|
{
|
|
const void *hashme;
|
|
|
|
if (s->rsz > CLI_MAX_ALLOCATION) {
|
|
cli_dbgmsg("cli_hashsect: skipping hash calculation for too big section\n");
|
|
return 0;
|
|
}
|
|
|
|
if(!s->rsz) return 0;
|
|
if(!(hashme=fmap_need_off_once(map, s->raw, s->rsz))) {
|
|
cli_dbgmsg("cli_hashsect: unable to read section data\n");
|
|
return 0;
|
|
}
|
|
|
|
if(foundhash[CLI_HASH_MD5] || foundwild[CLI_HASH_MD5])
|
|
cl_hash_data("md5", hashme, s->rsz, digest[CLI_HASH_MD5], NULL);
|
|
if(foundhash[CLI_HASH_SHA1] || foundwild[CLI_HASH_SHA1])
|
|
cl_sha1(hashme, s->rsz, digest[CLI_HASH_SHA1], NULL);
|
|
if(foundhash[CLI_HASH_SHA256] || foundwild[CLI_HASH_SHA256])
|
|
cl_sha256(hashme, s->rsz, digest[CLI_HASH_SHA256], NULL);
|
|
|
|
return 1;
|
|
}
|
|
|
|
/* check hash section sigs */
|
|
static int scan_pe_mdb (cli_ctx * ctx, struct cli_exe_section *exe_section)
|
|
{
|
|
struct cli_matcher * mdb_sect = ctx->engine->hm_mdb;
|
|
unsigned char * hashset[CLI_HASH_AVAIL_TYPES];
|
|
const char * virname = NULL;
|
|
int foundsize[CLI_HASH_AVAIL_TYPES];
|
|
int foundwild[CLI_HASH_AVAIL_TYPES];
|
|
enum CLI_HASH_TYPE type;
|
|
int ret = CL_CLEAN;
|
|
unsigned char * md5 = NULL;
|
|
|
|
/* pick hashtypes to generate */
|
|
for(type = CLI_HASH_MD5; type < CLI_HASH_AVAIL_TYPES; type++) {
|
|
foundsize[type] = cli_hm_have_size(mdb_sect, type, exe_section->rsz);
|
|
foundwild[type] = cli_hm_have_wild(mdb_sect, type);
|
|
if(foundsize[type] || foundwild[type]) {
|
|
hashset[type] = cli_malloc(hashlen[type]);
|
|
if(!hashset[type]) {
|
|
cli_errmsg("scan_pe: cli_malloc failed!\n");
|
|
for(; type > 0;)
|
|
free(hashset[--type]);
|
|
return CL_EMEM;
|
|
}
|
|
}
|
|
else {
|
|
hashset[type] = NULL;
|
|
}
|
|
}
|
|
|
|
/* Generate hashes */
|
|
cli_hashsect(*ctx->fmap, exe_section, hashset, foundsize, foundwild);
|
|
|
|
/* Print hash */
|
|
if (cli_debug_flag) {
|
|
md5 = hashset[CLI_HASH_MD5];
|
|
if (md5) {
|
|
cli_dbgmsg("MDB: %u:%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x\n",
|
|
exe_section->rsz, md5[0], md5[1], md5[2], md5[3], md5[4], md5[5], md5[6], md5[7],
|
|
md5[8], md5[9], md5[10], md5[11], md5[12], md5[13], md5[14], md5[15]);
|
|
} else if (cli_always_gen_section_hash) {
|
|
const void *hashme = fmap_need_off_once(*ctx->fmap, exe_section->raw, exe_section->rsz);
|
|
if (!(hashme)) {
|
|
cli_errmsg("scan_pe_mdb: unable to read section data\n");
|
|
ret = CL_EREAD;
|
|
goto end;
|
|
}
|
|
|
|
md5 = cli_malloc(16);
|
|
if (!(md5)) {
|
|
cli_errmsg("scan_pe_mdb: cli_malloc failed!\n");
|
|
ret = CL_EMEM;
|
|
goto end;
|
|
}
|
|
|
|
cl_hash_data("md5", hashme, exe_section->rsz, md5, NULL);
|
|
|
|
cli_dbgmsg("MDB: %u:%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x\n",
|
|
exe_section->rsz, md5[0], md5[1], md5[2], md5[3], md5[4], md5[5], md5[6], md5[7],
|
|
md5[8], md5[9], md5[10], md5[11], md5[12], md5[13], md5[14], md5[15]);
|
|
|
|
free(md5);
|
|
|
|
} else {
|
|
cli_dbgmsg("MDB: %u:notgenerated\n", exe_section->rsz);
|
|
}
|
|
}
|
|
|
|
/* Do scans */
|
|
for(type = CLI_HASH_MD5; type < CLI_HASH_AVAIL_TYPES; type++) {
|
|
if(foundsize[type] && cli_hm_scan(hashset[type], exe_section->rsz, &virname, mdb_sect, type) == CL_VIRUS) {
|
|
cli_append_virus(ctx, virname);
|
|
ret = CL_VIRUS;
|
|
if (!SCAN_ALL) {
|
|
break;
|
|
}
|
|
}
|
|
if(foundwild[type] && cli_hm_scan_wild(hashset[type], &virname, mdb_sect, type) == CL_VIRUS) {
|
|
cli_append_virus(ctx, virname);
|
|
ret = CL_VIRUS;
|
|
if (!SCAN_ALL) {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
end:
|
|
for(type = CLI_HASH_AVAIL_TYPES; type > 0;)
|
|
free(hashset[--type]);
|
|
return ret;
|
|
}
|
|
|
|
/* imptbl scanning */
|
|
static char *pe_ordinal(char *dll, uint16_t ord)
|
|
{
|
|
char name[64];
|
|
name[0] = '\0';
|
|
|
|
if (strncasecmp(dll, "WS2_32.dll", 10) == 0 ||
|
|
strncasecmp(dll, "wsock32.dll", 11) == 0)
|
|
{
|
|
switch(ord) {
|
|
case 1:
|
|
sprintf(name, "accept");
|
|
break;
|
|
case 2:
|
|
sprintf(name, "bind");
|
|
break;
|
|
case 3:
|
|
sprintf(name, "closesocket");
|
|
break;
|
|
case 4:
|
|
sprintf(name, "connect");
|
|
break;
|
|
case 5:
|
|
sprintf(name, "getpeername");
|
|
break;
|
|
case 6:
|
|
sprintf(name, "getsockname");
|
|
break;
|
|
case 7:
|
|
sprintf(name, "getsockopt");
|
|
break;
|
|
case 8:
|
|
sprintf(name, "htonl");
|
|
break;
|
|
case 9:
|
|
sprintf(name, "htons");
|
|
break;
|
|
case 10:
|
|
sprintf(name, "ioctlsocket");
|
|
break;
|
|
case 11:
|
|
sprintf(name, "inet_addr");
|
|
break;
|
|
case 12:
|
|
sprintf(name, "inet_ntoa");
|
|
break;
|
|
case 13:
|
|
sprintf(name, "listen");
|
|
break;
|
|
case 14:
|
|
sprintf(name, "ntohl");
|
|
break;
|
|
case 15:
|
|
sprintf(name, "ntohs");
|
|
break;
|
|
case 16:
|
|
sprintf(name, "recv");
|
|
break;
|
|
case 17:
|
|
sprintf(name, "recvfrom");
|
|
break;
|
|
case 18:
|
|
sprintf(name, "select");
|
|
break;
|
|
case 19:
|
|
sprintf(name, "send");
|
|
break;
|
|
case 20:
|
|
sprintf(name, "sendto");
|
|
break;
|
|
case 21:
|
|
sprintf(name, "setsockopt");
|
|
break;
|
|
case 22:
|
|
sprintf(name, "shutdown");
|
|
break;
|
|
case 23:
|
|
sprintf(name, "socket");
|
|
break;
|
|
case 24:
|
|
sprintf(name, "GetAddrInfoW");
|
|
break;
|
|
case 25:
|
|
sprintf(name, "GetNameInfoW");
|
|
break;
|
|
case 26:
|
|
sprintf(name, "WSApSetPostRoutine");
|
|
break;
|
|
case 27:
|
|
sprintf(name, "FreeAddrInfoW");
|
|
break;
|
|
case 28:
|
|
sprintf(name, "WPUCompleteOverlappedRequest");
|
|
break;
|
|
case 29:
|
|
sprintf(name, "WSAAccept");
|
|
break;
|
|
case 30:
|
|
sprintf(name, "WSAAddressToStringA");
|
|
break;
|
|
case 31:
|
|
sprintf(name, "WSAAddressToStringW");
|
|
break;
|
|
case 32:
|
|
sprintf(name, "WSACloseEvent");
|
|
break;
|
|
case 33:
|
|
sprintf(name, "WSAConnect");
|
|
break;
|
|
case 34:
|
|
sprintf(name, "WSACreateEvent");
|
|
break;
|
|
case 35:
|
|
sprintf(name, "WSADuplicateSocketA");
|
|
break;
|
|
case 36:
|
|
sprintf(name, "WSADuplicateSocketW");
|
|
break;
|
|
case 37:
|
|
sprintf(name, "WSAEnumNameSpaceProvidersA");
|
|
break;
|
|
case 38:
|
|
sprintf(name, "WSAEnumNameSpaceProvidersW");
|
|
break;
|
|
case 39:
|
|
sprintf(name, "WSAEnumNetworkEvents");
|
|
break;
|
|
case 40:
|
|
sprintf(name, "WSAEnumProtocolsA");
|
|
break;
|
|
case 41:
|
|
sprintf(name, "WSAEnumProtocolsW");
|
|
break;
|
|
case 42:
|
|
sprintf(name, "WSAEventSelect");
|
|
break;
|
|
case 43:
|
|
sprintf(name, "WSAGetOverlappedResult");
|
|
break;
|
|
case 44:
|
|
sprintf(name, "WSAGetQOSByName");
|
|
break;
|
|
case 45:
|
|
sprintf(name, "WSAGetServiceClassInfoA");
|
|
break;
|
|
case 46:
|
|
sprintf(name, "WSAGetServiceClassInfoW");
|
|
break;
|
|
case 47:
|
|
sprintf(name, "WSAGetServiceClassNameByClassIdA");
|
|
break;
|
|
case 48:
|
|
sprintf(name, "WSAGetServiceClassNameByClassIdW");
|
|
break;
|
|
case 49:
|
|
sprintf(name, "WSAHtonl");
|
|
break;
|
|
case 50:
|
|
sprintf(name, "WSAHtons");
|
|
break;
|
|
case 51:
|
|
sprintf(name, "gethostbyaddr");
|
|
break;
|
|
case 52:
|
|
sprintf(name, "gethostbyname");
|
|
break;
|
|
case 53:
|
|
sprintf(name, "getprotobyname");
|
|
break;
|
|
case 54:
|
|
sprintf(name, "getprotobynumber");
|
|
break;
|
|
case 55:
|
|
sprintf(name, "getservbyname");
|
|
break;
|
|
case 56:
|
|
sprintf(name, "getservbyport");
|
|
break;
|
|
case 57:
|
|
sprintf(name, "gethostname");
|
|
break;
|
|
case 58:
|
|
sprintf(name, "WSAInstallServiceClassA");
|
|
break;
|
|
case 59:
|
|
sprintf(name, "WSAInstallServiceClassW");
|
|
break;
|
|
case 60:
|
|
sprintf(name, "WSAIoctl");
|
|
break;
|
|
case 61:
|
|
sprintf(name, "WSAJoinLeaf");
|
|
break;
|
|
case 62:
|
|
sprintf(name, "WSALookupServiceBeginA");
|
|
break;
|
|
case 63:
|
|
sprintf(name, "WSALookupServiceBeginW");
|
|
break;
|
|
case 64:
|
|
sprintf(name, "WSALookupServiceEnd");
|
|
break;
|
|
case 65:
|
|
sprintf(name, "WSALookupServiceNextA");
|
|
break;
|
|
case 66:
|
|
sprintf(name, "WSALookupServiceNextW");
|
|
break;
|
|
case 67:
|
|
sprintf(name, "WSANSPIoctl");
|
|
break;
|
|
case 68:
|
|
sprintf(name, "WSANtohl");
|
|
break;
|
|
case 69:
|
|
sprintf(name, "WSANtohs");
|
|
break;
|
|
case 70:
|
|
sprintf(name, "WSAProviderConfigChange");
|
|
break;
|
|
case 71:
|
|
sprintf(name, "WSARecv");
|
|
break;
|
|
case 72:
|
|
sprintf(name, "WSARecvDisconnect");
|
|
break;
|
|
case 73:
|
|
sprintf(name, "WSARecvFrom");
|
|
break;
|
|
case 74:
|
|
sprintf(name, "WSARemoveServiceClass");
|
|
break;
|
|
case 75:
|
|
sprintf(name, "WSAResetEvent");
|
|
break;
|
|
case 76:
|
|
sprintf(name, "WSASend");
|
|
break;
|
|
case 77:
|
|
sprintf(name, "WSASendDisconnect");
|
|
break;
|
|
case 78:
|
|
sprintf(name, "WSASendTo");
|
|
break;
|
|
case 79:
|
|
sprintf(name, "WSASetEvent");
|
|
break;
|
|
case 80:
|
|
sprintf(name, "WSASetServiceA");
|
|
break;
|
|
case 81:
|
|
sprintf(name, "WSASetServiceW");
|
|
break;
|
|
case 82:
|
|
sprintf(name, "WSASocketA");
|
|
break;
|
|
case 83:
|
|
sprintf(name, "WSASocketW");
|
|
break;
|
|
case 84:
|
|
sprintf(name, "WSAStringToAddressA");
|
|
break;
|
|
case 85:
|
|
sprintf(name, "WSAStringToAddressW");
|
|
break;
|
|
case 86:
|
|
sprintf(name, "WSAWaitForMultipleEvents");
|
|
break;
|
|
case 87:
|
|
sprintf(name, "WSCDeinstallProvider");
|
|
break;
|
|
case 88:
|
|
sprintf(name, "WSCEnableNSProvider");
|
|
break;
|
|
case 89:
|
|
sprintf(name, "WSCEnumProtocols");
|
|
break;
|
|
case 90:
|
|
sprintf(name, "WSCGetProviderPath");
|
|
break;
|
|
case 91:
|
|
sprintf(name, "WSCInstallNameSpace");
|
|
break;
|
|
case 92:
|
|
sprintf(name, "WSCInstallProvider");
|
|
break;
|
|
case 93:
|
|
sprintf(name, "WSCUnInstallNameSpace");
|
|
break;
|
|
case 94:
|
|
sprintf(name, "WSCUpdateProvider");
|
|
break;
|
|
case 95:
|
|
sprintf(name, "WSCWriteNameSpaceOrder");
|
|
break;
|
|
case 96:
|
|
sprintf(name, "WSCWriteProviderOrder");
|
|
break;
|
|
case 97:
|
|
sprintf(name, "freeaddrinfo");
|
|
break;
|
|
case 98:
|
|
sprintf(name, "getaddrinfo");
|
|
break;
|
|
case 99:
|
|
sprintf(name, "getnameinfo");
|
|
break;
|
|
case 101:
|
|
sprintf(name, "WSAAsyncSelect");
|
|
break;
|
|
case 102:
|
|
sprintf(name, "WSAAsyncGetHostByAddr");
|
|
break;
|
|
case 103:
|
|
sprintf(name, "WSAAsyncGetHostByName");
|
|
break;
|
|
case 104:
|
|
sprintf(name, "WSAAsyncGetProtoByNumber");
|
|
break;
|
|
case 105:
|
|
sprintf(name, "WSAAsyncGetProtoByName");
|
|
break;
|
|
case 106:
|
|
sprintf(name, "WSAAsyncGetServByPort");
|
|
break;
|
|
case 107:
|
|
sprintf(name, "WSAAsyncGetServByName");
|
|
break;
|
|
case 108:
|
|
sprintf(name, "WSACancelAsyncRequest");
|
|
break;
|
|
case 109:
|
|
sprintf(name, "WSASetBlockingHook");
|
|
break;
|
|
case 110:
|
|
sprintf(name, "WSAUnhookBlockingHook");
|
|
break;
|
|
case 111:
|
|
sprintf(name, "WSAGetLastError");
|
|
break;
|
|
case 112:
|
|
sprintf(name, "WSASetLastError");
|
|
break;
|
|
case 113:
|
|
sprintf(name, "WSACancelBlockingCall");
|
|
break;
|
|
case 114:
|
|
sprintf(name, "WSAIsBlocking");
|
|
break;
|
|
case 115:
|
|
sprintf(name, "WSAStartup");
|
|
break;
|
|
case 116:
|
|
sprintf(name, "WSACleanup");
|
|
break;
|
|
case 151:
|
|
sprintf(name, "__WSAFDIsSet");
|
|
break;
|
|
case 500:
|
|
sprintf(name, "WEP");
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
else if (strncasecmp(dll, "oleaut32.dll", 12) == 0)
|
|
{
|
|
switch (ord) {
|
|
case 2:
|
|
sprintf(name, "SysAllocString");
|
|
break;
|
|
case 3:
|
|
sprintf(name, "SysReAllocString");
|
|
break;
|
|
case 4:
|
|
sprintf(name, "SysAllocStringLen");
|
|
break;
|
|
case 5:
|
|
sprintf(name, "SysReAllocStringLen");
|
|
break;
|
|
case 6:
|
|
sprintf(name, "SysFreeString");
|
|
break;
|
|
case 7:
|
|
sprintf(name, "SysStringLen");
|
|
break;
|
|
case 8:
|
|
sprintf(name, "VariantInit");
|
|
break;
|
|
case 9:
|
|
sprintf(name, "VariantClear");
|
|
break;
|
|
case 10:
|
|
sprintf(name, "VariantCopy");
|
|
break;
|
|
case 11:
|
|
sprintf(name, "VariantCopyInd");
|
|
break;
|
|
case 12:
|
|
sprintf(name, "VariantChangeType");
|
|
break;
|
|
case 13:
|
|
sprintf(name, "VariantTimeToDosDateTime");
|
|
break;
|
|
case 14:
|
|
sprintf(name, "DosDateTimeToVariantTime");
|
|
break;
|
|
case 15:
|
|
sprintf(name, "SafeArrayCreate");
|
|
break;
|
|
case 16:
|
|
sprintf(name, "SafeArrayDestroy");
|
|
break;
|
|
case 17:
|
|
sprintf(name, "SafeArrayGetDim");
|
|
break;
|
|
case 18:
|
|
sprintf(name, "SafeArrayGetElemsize");
|
|
break;
|
|
case 19:
|
|
sprintf(name, "SafeArrayGetUBound");
|
|
break;
|
|
case 20:
|
|
sprintf(name, "SafeArrayGetLBound");
|
|
break;
|
|
case 21:
|
|
sprintf(name, "SafeArrayLock");
|
|
break;
|
|
case 22:
|
|
sprintf(name, "SafeArrayUnlock");
|
|
break;
|
|
case 23:
|
|
sprintf(name, "SafeArrayAccessData");
|
|
break;
|
|
case 24:
|
|
sprintf(name, "SafeArrayUnaccessData");
|
|
break;
|
|
case 25:
|
|
sprintf(name, "SafeArrayGetElement");
|
|
break;
|
|
case 26:
|
|
sprintf(name, "SafeArrayPutElement");
|
|
break;
|
|
case 27:
|
|
sprintf(name, "SafeArrayCopy");
|
|
break;
|
|
case 28:
|
|
sprintf(name, "DispGetParam");
|
|
break;
|
|
case 29:
|
|
sprintf(name, "DispGetIDsOfNames");
|
|
break;
|
|
case 30:
|
|
sprintf(name, "DispInvoke");
|
|
break;
|
|
case 31:
|
|
sprintf(name, "CreateDispTypeInfo");
|
|
break;
|
|
case 32:
|
|
sprintf(name, "CreateStdDispatch");
|
|
break;
|
|
case 33:
|
|
sprintf(name, "RegisterActiveObject");
|
|
break;
|
|
case 34:
|
|
sprintf(name, "RevokeActiveObject");
|
|
break;
|
|
case 35:
|
|
sprintf(name, "GetActiveObject");
|
|
break;
|
|
case 36:
|
|
sprintf(name, "SafeArrayAllocDescriptor");
|
|
break;
|
|
case 37:
|
|
sprintf(name, "SafeArrayAllocData");
|
|
break;
|
|
case 38:
|
|
sprintf(name, "SafeArrayDestroyDescriptor");
|
|
break;
|
|
case 39:
|
|
sprintf(name, "SafeArrayDestroyData");
|
|
break;
|
|
case 40:
|
|
sprintf(name, "SafeArrayRedim");
|
|
break;
|
|
case 41:
|
|
sprintf(name, "SafeArrayAllocDescriptorEx");
|
|
break;
|
|
case 42:
|
|
sprintf(name, "SafeArrayCreateEx");
|
|
break;
|
|
case 43:
|
|
sprintf(name, "SafeArrayCreateVectorEx");
|
|
break;
|
|
case 44:
|
|
sprintf(name, "SafeArraySetRecordInfo");
|
|
break;
|
|
case 45:
|
|
sprintf(name, "SafeArrayGetRecordInfo");
|
|
break;
|
|
case 46:
|
|
sprintf(name, "VarParseNumFromStr");
|
|
break;
|
|
case 47:
|
|
sprintf(name, "VarNumFromParseNum");
|
|
break;
|
|
case 48:
|
|
sprintf(name, "VarI2FromUI1");
|
|
break;
|
|
case 49:
|
|
sprintf(name, "VarI2FromI4");
|
|
break;
|
|
case 50:
|
|
sprintf(name, "VarI2FromR4");
|
|
break;
|
|
case 51:
|
|
sprintf(name, "VarI2FromR8");
|
|
break;
|
|
case 52:
|
|
sprintf(name, "VarI2FromCy");
|
|
break;
|
|
case 53:
|
|
sprintf(name, "VarI2FromDate");
|
|
break;
|
|
case 54:
|
|
sprintf(name, "VarI2FromStr");
|
|
break;
|
|
case 55:
|
|
sprintf(name, "VarI2FromDisp");
|
|
break;
|
|
case 56:
|
|
sprintf(name, "VarI2FromBool");
|
|
break;
|
|
case 57:
|
|
sprintf(name, "SafeArraySetIID");
|
|
break;
|
|
case 58:
|
|
sprintf(name, "VarI4FromUI1");
|
|
break;
|
|
case 59:
|
|
sprintf(name, "VarI4FromI2");
|
|
break;
|
|
case 60:
|
|
sprintf(name, "VarI4FromR4");
|
|
break;
|
|
case 61:
|
|
sprintf(name, "VarI4FromR8");
|
|
break;
|
|
case 62:
|
|
sprintf(name, "VarI4FromCy");
|
|
break;
|
|
case 63:
|
|
sprintf(name, "VarI4FromDate");
|
|
break;
|
|
case 64:
|
|
sprintf(name, "VarI4FromStr");
|
|
break;
|
|
case 65:
|
|
sprintf(name, "VarI4FromDisp");
|
|
break;
|
|
case 66:
|
|
sprintf(name, "VarI4FromBool");
|
|
break;
|
|
case 67:
|
|
sprintf(name, "SafeArrayGetIID");
|
|
break;
|
|
case 68:
|
|
sprintf(name, "VarR4FromUI1");
|
|
break;
|
|
case 69:
|
|
sprintf(name, "VarR4FromI2");
|
|
break;
|
|
case 70:
|
|
sprintf(name, "VarR4FromI4");
|
|
break;
|
|
case 71:
|
|
sprintf(name, "VarR4FromR8");
|
|
break;
|
|
case 72:
|
|
sprintf(name, "VarR4FromCy");
|
|
break;
|
|
case 73:
|
|
sprintf(name, "VarR4FromDate");
|
|
break;
|
|
case 74:
|
|
sprintf(name, "VarR4FromStr");
|
|
break;
|
|
case 75:
|
|
sprintf(name, "VarR4FromDisp");
|
|
break;
|
|
case 76:
|
|
sprintf(name, "VarR4FromBool");
|
|
break;
|
|
case 77:
|
|
sprintf(name, "SafeArrayGetVartype");
|
|
break;
|
|
case 78:
|
|
sprintf(name, "VarR8FromUI1");
|
|
break;
|
|
case 79:
|
|
sprintf(name, "VarR8FromI2");
|
|
break;
|
|
case 80:
|
|
sprintf(name, "VarR8FromI4");
|
|
break;
|
|
case 81:
|
|
sprintf(name, "VarR8FromR4");
|
|
break;
|
|
case 82:
|
|
sprintf(name, "VarR8FromCy");
|
|
break;
|
|
case 83:
|
|
sprintf(name, "VarR8FromDate");
|
|
break;
|
|
case 84:
|
|
sprintf(name, "VarR8FromStr");
|
|
break;
|
|
case 85:
|
|
sprintf(name, "VarR8FromDisp");
|
|
break;
|
|
case 86:
|
|
sprintf(name, "VarR8FromBool");
|
|
break;
|
|
case 87:
|
|
sprintf(name, "VarFormat");
|
|
break;
|
|
case 88:
|
|
sprintf(name, "VarDateFromUI1");
|
|
break;
|
|
case 89:
|
|
sprintf(name, "VarDateFromI2");
|
|
break;
|
|
case 90:
|
|
sprintf(name, "VarDateFromI4");
|
|
break;
|
|
case 91:
|
|
sprintf(name, "VarDateFromR4");
|
|
break;
|
|
case 92:
|
|
sprintf(name, "VarDateFromR8");
|
|
break;
|
|
case 93:
|
|
sprintf(name, "VarDateFromCy");
|
|
break;
|
|
case 94:
|
|
sprintf(name, "VarDateFromStr");
|
|
break;
|
|
case 95:
|
|
sprintf(name, "VarDateFromDisp");
|
|
break;
|
|
case 96:
|
|
sprintf(name, "VarDateFromBool");
|
|
break;
|
|
case 97:
|
|
sprintf(name, "VarFormatDateTime");
|
|
break;
|
|
case 98:
|
|
sprintf(name, "VarCyFromUI1");
|
|
break;
|
|
case 99:
|
|
sprintf(name, "VarCyFromI2");
|
|
break;
|
|
case 100:
|
|
sprintf(name, "VarCyFromI4");
|
|
break;
|
|
case 101:
|
|
sprintf(name, "VarCyFromR4");
|
|
break;
|
|
case 102:
|
|
sprintf(name, "VarCyFromR8");
|
|
break;
|
|
case 103:
|
|
sprintf(name, "VarCyFromDate");
|
|
break;
|
|
case 104:
|
|
sprintf(name, "VarCyFromStr");
|
|
break;
|
|
case 105:
|
|
sprintf(name, "VarCyFromDisp");
|
|
break;
|
|
case 106:
|
|
sprintf(name, "VarCyFromBool");
|
|
break;
|
|
case 107:
|
|
sprintf(name, "VarFormatNumber");
|
|
break;
|
|
case 108:
|
|
sprintf(name, "VarBstrFromUI1");
|
|
break;
|
|
case 109:
|
|
sprintf(name, "VarBstrFromI2");
|
|
break;
|
|
case 110:
|
|
sprintf(name, "VarBstrFromI4");
|
|
break;
|
|
case 111:
|
|
sprintf(name, "VarBstrFromR4");
|
|
break;
|
|
case 112:
|
|
sprintf(name, "VarBstrFromR8");
|
|
break;
|
|
case 113:
|
|
sprintf(name, "VarBstrFromCy");
|
|
break;
|
|
case 114:
|
|
sprintf(name, "VarBstrFromDate");
|
|
break;
|
|
case 115:
|
|
sprintf(name, "VarBstrFromDisp");
|
|
break;
|
|
case 116:
|
|
sprintf(name, "VarBstrFromBool");
|
|
break;
|
|
case 117:
|
|
sprintf(name, "VarFormatPercent");
|
|
break;
|
|
case 118:
|
|
sprintf(name, "VarBoolFromUI1");
|
|
break;
|
|
case 119:
|
|
sprintf(name, "VarBoolFromI2");
|
|
break;
|
|
case 120:
|
|
sprintf(name, "VarBoolFromI4");
|
|
break;
|
|
case 121:
|
|
sprintf(name, "VarBoolFromR4");
|
|
break;
|
|
case 122:
|
|
sprintf(name, "VarBoolFromR8");
|
|
break;
|
|
case 123:
|
|
sprintf(name, "VarBoolFromDate");
|
|
break;
|
|
case 124:
|
|
sprintf(name, "VarBoolFromCy");
|
|
break;
|
|
case 125:
|
|
sprintf(name, "VarBoolFromStr");
|
|
break;
|
|
case 126:
|
|
sprintf(name, "VarBoolFromDisp");
|
|
break;
|
|
case 127:
|
|
sprintf(name, "VarFormatCurrency");
|
|
break;
|
|
case 128:
|
|
sprintf(name, "VarWeekdayName");
|
|
break;
|
|
case 129:
|
|
sprintf(name, "VarMonthName");
|
|
break;
|
|
case 130:
|
|
sprintf(name, "VarUI1FromI2");
|
|
break;
|
|
case 131:
|
|
sprintf(name, "VarUI1FromI4");
|
|
break;
|
|
case 132:
|
|
sprintf(name, "VarUI1FromR4");
|
|
break;
|
|
case 133:
|
|
sprintf(name, "VarUI1FromR8");
|
|
break;
|
|
case 134:
|
|
sprintf(name, "VarUI1FromCy");
|
|
break;
|
|
case 135:
|
|
sprintf(name, "VarUI1FromDate");
|
|
break;
|
|
case 136:
|
|
sprintf(name, "VarUI1FromStr");
|
|
break;
|
|
case 137:
|
|
sprintf(name, "VarUI1FromDisp");
|
|
break;
|
|
case 138:
|
|
sprintf(name, "VarUI1FromBool");
|
|
break;
|
|
case 139:
|
|
sprintf(name, "VarFormatFromTokens");
|
|
break;
|
|
case 140:
|
|
sprintf(name, "VarTokenizeFormatString");
|
|
break;
|
|
case 141:
|
|
sprintf(name, "VarAdd");
|
|
break;
|
|
case 142:
|
|
sprintf(name, "VarAnd");
|
|
break;
|
|
case 143:
|
|
sprintf(name, "VarDiv");
|
|
break;
|
|
case 144:
|
|
sprintf(name, "DllCanUnloadNow");
|
|
break;
|
|
case 145:
|
|
sprintf(name, "DllGetClassObject");
|
|
break;
|
|
case 146:
|
|
sprintf(name, "DispCallFunc");
|
|
break;
|
|
case 147:
|
|
sprintf(name, "VariantChangeTypeEx");
|
|
break;
|
|
case 148:
|
|
sprintf(name, "SafeArrayPtrOfIndex");
|
|
break;
|
|
case 149:
|
|
sprintf(name, "SysStringByteLen");
|
|
break;
|
|
case 150:
|
|
sprintf(name, "SysAllocStringByteLen");
|
|
break;
|
|
case 151:
|
|
sprintf(name, "DllRegisterServer");
|
|
break;
|
|
case 152:
|
|
sprintf(name, "VarEqv");
|
|
break;
|
|
case 153:
|
|
sprintf(name, "VarIdiv");
|
|
break;
|
|
case 154:
|
|
sprintf(name, "VarImp");
|
|
break;
|
|
case 155:
|
|
sprintf(name, "VarMod");
|
|
break;
|
|
case 156:
|
|
sprintf(name, "VarMul");
|
|
break;
|
|
case 157:
|
|
sprintf(name, "VarOr");
|
|
break;
|
|
case 158:
|
|
sprintf(name, "VarPow");
|
|
break;
|
|
case 159:
|
|
sprintf(name, "VarSub");
|
|
break;
|
|
case 160:
|
|
sprintf(name, "CreateTypeLib");
|
|
break;
|
|
case 161:
|
|
sprintf(name, "LoadTypeLib");
|
|
break;
|
|
case 162:
|
|
sprintf(name, "LoadRegTypeLib");
|
|
break;
|
|
case 163:
|
|
sprintf(name, "RegisterTypeLib");
|
|
break;
|
|
case 164:
|
|
sprintf(name, "QueryPathOfRegTypeLib");
|
|
break;
|
|
case 165:
|
|
sprintf(name, "LHashValOfNameSys");
|
|
break;
|
|
case 166:
|
|
sprintf(name, "LHashValOfNameSysA");
|
|
break;
|
|
case 167:
|
|
sprintf(name, "VarXor");
|
|
break;
|
|
case 168:
|
|
sprintf(name, "VarAbs");
|
|
break;
|
|
case 169:
|
|
sprintf(name, "VarFix");
|
|
break;
|
|
case 170:
|
|
sprintf(name, "OaBuildVersion");
|
|
break;
|
|
case 171:
|
|
sprintf(name, "ClearCustData");
|
|
break;
|
|
case 172:
|
|
sprintf(name, "VarInt");
|
|
break;
|
|
case 173:
|
|
sprintf(name, "VarNeg");
|
|
break;
|
|
case 174:
|
|
sprintf(name, "VarNot");
|
|
break;
|
|
case 175:
|
|
sprintf(name, "VarRound");
|
|
break;
|
|
case 176:
|
|
sprintf(name, "VarCmp");
|
|
break;
|
|
case 177:
|
|
sprintf(name, "VarDecAdd");
|
|
break;
|
|
case 178:
|
|
sprintf(name, "VarDecDiv");
|
|
break;
|
|
case 179:
|
|
sprintf(name, "VarDecMul");
|
|
break;
|
|
case 180:
|
|
sprintf(name, "CreateTypeLib2");
|
|
break;
|
|
case 181:
|
|
sprintf(name, "VarDecSub");
|
|
break;
|
|
case 182:
|
|
sprintf(name, "VarDecAbs");
|
|
break;
|
|
case 183:
|
|
sprintf(name, "LoadTypeLibEx");
|
|
break;
|
|
case 184:
|
|
sprintf(name, "SystemTimeToVariantTime");
|
|
break;
|
|
case 185:
|
|
sprintf(name, "VariantTimeToSystemTime");
|
|
break;
|
|
case 186:
|
|
sprintf(name, "UnRegisterTypeLib");
|
|
break;
|
|
case 187:
|
|
sprintf(name, "VarDecFix");
|
|
break;
|
|
case 188:
|
|
sprintf(name, "VarDecInt");
|
|
break;
|
|
case 189:
|
|
sprintf(name, "VarDecNeg");
|
|
break;
|
|
case 190:
|
|
sprintf(name, "VarDecFromUI1");
|
|
break;
|
|
case 191:
|
|
sprintf(name, "VarDecFromI2");
|
|
break;
|
|
case 192:
|
|
sprintf(name, "VarDecFromI4");
|
|
break;
|
|
case 193:
|
|
sprintf(name, "VarDecFromR4");
|
|
break;
|
|
case 194:
|
|
sprintf(name, "VarDecFromR8");
|
|
break;
|
|
case 195:
|
|
sprintf(name, "VarDecFromDate");
|
|
break;
|
|
case 196:
|
|
sprintf(name, "VarDecFromCy");
|
|
break;
|
|
case 197:
|
|
sprintf(name, "VarDecFromStr");
|
|
break;
|
|
case 198:
|
|
sprintf(name, "VarDecFromDisp");
|
|
break;
|
|
case 199:
|
|
sprintf(name, "VarDecFromBool");
|
|
break;
|
|
case 200:
|
|
sprintf(name, "GetErrorInfo");
|
|
break;
|
|
case 201:
|
|
sprintf(name, "SetErrorInfo");
|
|
break;
|
|
case 202:
|
|
sprintf(name, "CreateErrorInfo");
|
|
break;
|
|
case 203:
|
|
sprintf(name, "VarDecRound");
|
|
break;
|
|
case 204:
|
|
sprintf(name, "VarDecCmp");
|
|
break;
|
|
case 205:
|
|
sprintf(name, "VarI2FromI1");
|
|
break;
|
|
case 206:
|
|
sprintf(name, "VarI2FromUI2");
|
|
break;
|
|
case 207:
|
|
sprintf(name, "VarI2FromUI4");
|
|
break;
|
|
case 208:
|
|
sprintf(name, "VarI2FromDec");
|
|
break;
|
|
case 209:
|
|
sprintf(name, "VarI4FromI1");
|
|
break;
|
|
case 210:
|
|
sprintf(name, "VarI4FromUI2");
|
|
break;
|
|
case 211:
|
|
sprintf(name, "VarI4FromUI4");
|
|
break;
|
|
case 212:
|
|
sprintf(name, "VarI4FromDec");
|
|
break;
|
|
case 213:
|
|
sprintf(name, "VarR4FromI1");
|
|
break;
|
|
case 214:
|
|
sprintf(name, "VarR4FromUI2");
|
|
break;
|
|
case 215:
|
|
sprintf(name, "VarR4FromUI4");
|
|
break;
|
|
case 216:
|
|
sprintf(name, "VarR4FromDec");
|
|
break;
|
|
case 217:
|
|
sprintf(name, "VarR8FromI1");
|
|
break;
|
|
case 218:
|
|
sprintf(name, "VarR8FromUI2");
|
|
break;
|
|
case 219:
|
|
sprintf(name, "VarR8FromUI4");
|
|
break;
|
|
case 220:
|
|
sprintf(name, "VarR8FromDec");
|
|
break;
|
|
case 221:
|
|
sprintf(name, "VarDateFromI1");
|
|
break;
|
|
case 222:
|
|
sprintf(name, "VarDateFromUI2");
|
|
break;
|
|
case 223:
|
|
sprintf(name, "VarDateFromUI4");
|
|
break;
|
|
case 224:
|
|
sprintf(name, "VarDateFromDec");
|
|
break;
|
|
case 225:
|
|
sprintf(name, "VarCyFromI1");
|
|
break;
|
|
case 226:
|
|
sprintf(name, "VarCyFromUI2");
|
|
break;
|
|
case 227:
|
|
sprintf(name, "VarCyFromUI4");
|
|
break;
|
|
case 228:
|
|
sprintf(name, "VarCyFromDec");
|
|
break;
|
|
case 229:
|
|
sprintf(name, "VarBstrFromI1");
|
|
break;
|
|
case 230:
|
|
sprintf(name, "VarBstrFromUI2");
|
|
break;
|
|
case 231:
|
|
sprintf(name, "VarBstrFromUI4");
|
|
break;
|
|
case 232:
|
|
sprintf(name, "VarBstrFromDec");
|
|
break;
|
|
case 233:
|
|
sprintf(name, "VarBoolFromI1");
|
|
break;
|
|
case 234:
|
|
sprintf(name, "VarBoolFromUI2");
|
|
break;
|
|
case 235:
|
|
sprintf(name, "VarBoolFromUI4");
|
|
break;
|
|
case 236:
|
|
sprintf(name, "VarBoolFromDec");
|
|
break;
|
|
case 237:
|
|
sprintf(name, "VarUI1FromI1");
|
|
break;
|
|
case 238:
|
|
sprintf(name, "VarUI1FromUI2");
|
|
break;
|
|
case 239:
|
|
sprintf(name, "VarUI1FromUI4");
|
|
break;
|
|
case 240:
|
|
sprintf(name, "VarUI1FromDec");
|
|
break;
|
|
case 241:
|
|
sprintf(name, "VarDecFromI1");
|
|
break;
|
|
case 242:
|
|
sprintf(name, "VarDecFromUI2");
|
|
break;
|
|
case 243:
|
|
sprintf(name, "VarDecFromUI4");
|
|
break;
|
|
case 244:
|
|
sprintf(name, "VarI1FromUI1");
|
|
break;
|
|
case 245:
|
|
sprintf(name, "VarI1FromI2");
|
|
break;
|
|
case 246:
|
|
sprintf(name, "VarI1FromI4");
|
|
break;
|
|
case 247:
|
|
sprintf(name, "VarI1FromR4");
|
|
break;
|
|
case 248:
|
|
sprintf(name, "VarI1FromR8");
|
|
break;
|
|
case 249:
|
|
sprintf(name, "VarI1FromDate");
|
|
break;
|
|
case 250:
|
|
sprintf(name, "VarI1FromCy");
|
|
break;
|
|
case 251:
|
|
sprintf(name, "VarI1FromStr");
|
|
break;
|
|
case 252:
|
|
sprintf(name, "VarI1FromDisp");
|
|
break;
|
|
case 253:
|
|
sprintf(name, "VarI1FromBool");
|
|
break;
|
|
case 254:
|
|
sprintf(name, "VarI1FromUI2");
|
|
break;
|
|
case 255:
|
|
sprintf(name, "VarI1FromUI4");
|
|
break;
|
|
case 256:
|
|
sprintf(name, "VarI1FromDec");
|
|
break;
|
|
case 257:
|
|
sprintf(name, "VarUI2FromUI1");
|
|
break;
|
|
case 258:
|
|
sprintf(name, "VarUI2FromI2");
|
|
break;
|
|
case 259:
|
|
sprintf(name, "VarUI2FromI4");
|
|
break;
|
|
case 260:
|
|
sprintf(name, "VarUI2FromR4");
|
|
break;
|
|
case 261:
|
|
sprintf(name, "VarUI2FromR8");
|
|
break;
|
|
case 262:
|
|
sprintf(name, "VarUI2FromDate");
|
|
break;
|
|
case 263:
|
|
sprintf(name, "VarUI2FromCy");
|
|
break;
|
|
case 264:
|
|
sprintf(name, "VarUI2FromStr");
|
|
break;
|
|
case 265:
|
|
sprintf(name, "VarUI2FromDisp");
|
|
break;
|
|
case 266:
|
|
sprintf(name, "VarUI2FromBool");
|
|
break;
|
|
case 267:
|
|
sprintf(name, "VarUI2FromI1");
|
|
break;
|
|
case 268:
|
|
sprintf(name, "VarUI2FromUI4");
|
|
break;
|
|
case 269:
|
|
sprintf(name, "VarUI2FromDec");
|
|
break;
|
|
case 270:
|
|
sprintf(name, "VarUI4FromUI1");
|
|
break;
|
|
case 271:
|
|
sprintf(name, "VarUI4FromI2");
|
|
break;
|
|
case 272:
|
|
sprintf(name, "VarUI4FromI4");
|
|
break;
|
|
case 273:
|
|
sprintf(name, "VarUI4FromR4");
|
|
break;
|
|
case 274:
|
|
sprintf(name, "VarUI4FromR8");
|
|
break;
|
|
case 275:
|
|
sprintf(name, "VarUI4FromDate");
|
|
break;
|
|
case 276:
|
|
sprintf(name, "VarUI4FromCy");
|
|
break;
|
|
case 277:
|
|
sprintf(name, "VarUI4FromStr");
|
|
break;
|
|
case 278:
|
|
sprintf(name, "VarUI4FromDisp");
|
|
break;
|
|
case 279:
|
|
sprintf(name, "VarUI4FromBool");
|
|
break;
|
|
case 280:
|
|
sprintf(name, "VarUI4FromI1");
|
|
break;
|
|
case 281:
|
|
sprintf(name, "VarUI4FromUI2");
|
|
break;
|
|
case 282:
|
|
sprintf(name, "VarUI4FromDec");
|
|
break;
|
|
case 283:
|
|
sprintf(name, "BSTR_UserSize");
|
|
break;
|
|
case 284:
|
|
sprintf(name, "BSTR_UserMarshal");
|
|
break;
|
|
case 285:
|
|
sprintf(name, "BSTR_UserUnmarshal");
|
|
break;
|
|
case 286:
|
|
sprintf(name, "BSTR_UserFree");
|
|
break;
|
|
case 287:
|
|
sprintf(name, "VARIANT_UserSize");
|
|
break;
|
|
case 288:
|
|
sprintf(name, "VARIANT_UserMarshal");
|
|
break;
|
|
case 289:
|
|
sprintf(name, "VARIANT_UserUnmarshal");
|
|
break;
|
|
case 290:
|
|
sprintf(name, "VARIANT_UserFree");
|
|
break;
|
|
case 291:
|
|
sprintf(name, "LPSAFEARRAY_UserSize");
|
|
break;
|
|
case 292:
|
|
sprintf(name, "LPSAFEARRAY_UserMarshal");
|
|
break;
|
|
case 293:
|
|
sprintf(name, "LPSAFEARRAY_UserUnmarshal");
|
|
break;
|
|
case 294:
|
|
sprintf(name, "LPSAFEARRAY_UserFree");
|
|
break;
|
|
case 295:
|
|
sprintf(name, "LPSAFEARRAY_Size");
|
|
break;
|
|
case 296:
|
|
sprintf(name, "LPSAFEARRAY_Marshal");
|
|
break;
|
|
case 297:
|
|
sprintf(name, "LPSAFEARRAY_Unmarshal");
|
|
break;
|
|
case 298:
|
|
sprintf(name, "VarDecCmpR8");
|
|
break;
|
|
case 299:
|
|
sprintf(name, "VarCyAdd");
|
|
break;
|
|
case 300:
|
|
sprintf(name, "DllUnregisterServer");
|
|
break;
|
|
case 301:
|
|
sprintf(name, "OACreateTypeLib2");
|
|
break;
|
|
case 303:
|
|
sprintf(name, "VarCyMul");
|
|
break;
|
|
case 304:
|
|
sprintf(name, "VarCyMulI4");
|
|
break;
|
|
case 305:
|
|
sprintf(name, "VarCySub");
|
|
break;
|
|
case 306:
|
|
sprintf(name, "VarCyAbs");
|
|
break;
|
|
case 307:
|
|
sprintf(name, "VarCyFix");
|
|
break;
|
|
case 308:
|
|
sprintf(name, "VarCyInt");
|
|
break;
|
|
case 309:
|
|
sprintf(name, "VarCyNeg");
|
|
break;
|
|
case 310:
|
|
sprintf(name, "VarCyRound");
|
|
break;
|
|
case 311:
|
|
sprintf(name, "VarCyCmp");
|
|
break;
|
|
case 312:
|
|
sprintf(name, "VarCyCmpR8");
|
|
break;
|
|
case 313:
|
|
sprintf(name, "VarBstrCat");
|
|
break;
|
|
case 314:
|
|
sprintf(name, "VarBstrCmp");
|
|
break;
|
|
case 315:
|
|
sprintf(name, "VarR8Pow");
|
|
break;
|
|
case 316:
|
|
sprintf(name, "VarR4CmpR8");
|
|
break;
|
|
case 317:
|
|
sprintf(name, "VarR8Round");
|
|
break;
|
|
case 318:
|
|
sprintf(name, "VarCat");
|
|
break;
|
|
case 319:
|
|
sprintf(name, "VarDateFromUdateEx");
|
|
break;
|
|
case 322:
|
|
sprintf(name, "GetRecordInfoFromGuids");
|
|
break;
|
|
case 323:
|
|
sprintf(name, "GetRecordInfoFromTypeInfo");
|
|
break;
|
|
case 325:
|
|
sprintf(name, "SetVarConversionLocaleSetting");
|
|
break;
|
|
case 326:
|
|
sprintf(name, "GetVarConversionLocaleSetting");
|
|
break;
|
|
case 327:
|
|
sprintf(name, "SetOaNoCache");
|
|
break;
|
|
case 329:
|
|
sprintf(name, "VarCyMulI8");
|
|
break;
|
|
case 330:
|
|
sprintf(name, "VarDateFromUdate");
|
|
break;
|
|
case 331:
|
|
sprintf(name, "VarUdateFromDate");
|
|
break;
|
|
case 332:
|
|
sprintf(name, "GetAltMonthNames");
|
|
break;
|
|
case 333:
|
|
sprintf(name, "VarI8FromUI1");
|
|
break;
|
|
case 334:
|
|
sprintf(name, "VarI8FromI2");
|
|
break;
|
|
case 335:
|
|
sprintf(name, "VarI8FromR4");
|
|
break;
|
|
case 336:
|
|
sprintf(name, "VarI8FromR8");
|
|
break;
|
|
case 337:
|
|
sprintf(name, "VarI8FromCy");
|
|
break;
|
|
case 338:
|
|
sprintf(name, "VarI8FromDate");
|
|
break;
|
|
case 339:
|
|
sprintf(name, "VarI8FromStr");
|
|
break;
|
|
case 340:
|
|
sprintf(name, "VarI8FromDisp");
|
|
break;
|
|
case 341:
|
|
sprintf(name, "VarI8FromBool");
|
|
break;
|
|
case 342:
|
|
sprintf(name, "VarI8FromI1");
|
|
break;
|
|
case 343:
|
|
sprintf(name, "VarI8FromUI2");
|
|
break;
|
|
case 344:
|
|
sprintf(name, "VarI8FromUI4");
|
|
break;
|
|
case 345:
|
|
sprintf(name, "VarI8FromDec");
|
|
break;
|
|
case 346:
|
|
sprintf(name, "VarI2FromI8");
|
|
break;
|
|
case 347:
|
|
sprintf(name, "VarI2FromUI8");
|
|
break;
|
|
case 348:
|
|
sprintf(name, "VarI4FromI8");
|
|
break;
|
|
case 349:
|
|
sprintf(name, "VarI4FromUI8");
|
|
break;
|
|
case 360:
|
|
sprintf(name, "VarR4FromI8");
|
|
break;
|
|
case 361:
|
|
sprintf(name, "VarR4FromUI8");
|
|
break;
|
|
case 362:
|
|
sprintf(name, "VarR8FromI8");
|
|
break;
|
|
case 363:
|
|
sprintf(name, "VarR8FromUI8");
|
|
break;
|
|
case 364:
|
|
sprintf(name, "VarDateFromI8");
|
|
break;
|
|
case 365:
|
|
sprintf(name, "VarDateFromUI8");
|
|
break;
|
|
case 366:
|
|
sprintf(name, "VarCyFromI8");
|
|
break;
|
|
case 367:
|
|
sprintf(name, "VarCyFromUI8");
|
|
break;
|
|
case 368:
|
|
sprintf(name, "VarBstrFromI8");
|
|
break;
|
|
case 369:
|
|
sprintf(name, "VarBstrFromUI8");
|
|
break;
|
|
case 370:
|
|
sprintf(name, "VarBoolFromI8");
|
|
break;
|
|
case 371:
|
|
sprintf(name, "VarBoolFromUI8");
|
|
break;
|
|
case 372:
|
|
sprintf(name, "VarUI1FromI8");
|
|
break;
|
|
case 373:
|
|
sprintf(name, "VarUI1FromUI8");
|
|
break;
|
|
case 374:
|
|
sprintf(name, "VarDecFromI8");
|
|
break;
|
|
case 375:
|
|
sprintf(name, "VarDecFromUI8");
|
|
break;
|
|
case 376:
|
|
sprintf(name, "VarI1FromI8");
|
|
break;
|
|
case 377:
|
|
sprintf(name, "VarI1FromUI8");
|
|
break;
|
|
case 378:
|
|
sprintf(name, "VarUI2FromI8");
|
|
break;
|
|
case 379:
|
|
sprintf(name, "VarUI2FromUI8");
|
|
break;
|
|
case 401:
|
|
sprintf(name, "OleLoadPictureEx");
|
|
break;
|
|
case 402:
|
|
sprintf(name, "OleLoadPictureFileEx");
|
|
break;
|
|
case 411:
|
|
sprintf(name, "SafeArrayCreateVector");
|
|
break;
|
|
case 412:
|
|
sprintf(name, "SafeArrayCopyData");
|
|
break;
|
|
case 413:
|
|
sprintf(name, "VectorFromBstr");
|
|
break;
|
|
case 414:
|
|
sprintf(name, "BstrFromVector");
|
|
break;
|
|
case 415:
|
|
sprintf(name, "OleIconToCursor");
|
|
break;
|
|
case 416:
|
|
sprintf(name, "OleCreatePropertyFrameIndirect");
|
|
break;
|
|
case 417:
|
|
sprintf(name, "OleCreatePropertyFrame");
|
|
break;
|
|
case 418:
|
|
sprintf(name, "OleLoadPicture");
|
|
break;
|
|
case 419:
|
|
sprintf(name, "OleCreatePictureIndirect");
|
|
break;
|
|
case 420:
|
|
sprintf(name, "OleCreateFontIndirect");
|
|
break;
|
|
case 421:
|
|
sprintf(name, "OleTranslateColor");
|
|
break;
|
|
case 422:
|
|
sprintf(name, "OleLoadPictureFile");
|
|
break;
|
|
case 423:
|
|
sprintf(name, "OleSavePictureFile");
|
|
break;
|
|
case 424:
|
|
sprintf(name, "OleLoadPicturePath");
|
|
break;
|
|
case 425:
|
|
sprintf(name, "VarUI4FromI8");
|
|
break;
|
|
case 426:
|
|
sprintf(name, "VarUI4FromUI8");
|
|
break;
|
|
case 427:
|
|
sprintf(name, "VarI8FromUI8");
|
|
break;
|
|
case 428:
|
|
sprintf(name, "VarUI8FromI8");
|
|
break;
|
|
case 429:
|
|
sprintf(name, "VarUI8FromUI1");
|
|
break;
|
|
case 430:
|
|
sprintf(name, "VarUI8FromI2");
|
|
break;
|
|
case 431:
|
|
sprintf(name, "VarUI8FromR4");
|
|
break;
|
|
case 432:
|
|
sprintf(name, "VarUI8FromR8");
|
|
break;
|
|
case 433:
|
|
sprintf(name, "VarUI8FromCy");
|
|
break;
|
|
case 434:
|
|
sprintf(name, "VarUI8FromDate");
|
|
break;
|
|
case 435:
|
|
sprintf(name, "VarUI8FromStr");
|
|
break;
|
|
case 436:
|
|
sprintf(name, "VarUI8FromDisp");
|
|
break;
|
|
case 437:
|
|
sprintf(name, "VarUI8FromBool");
|
|
break;
|
|
case 438:
|
|
sprintf(name, "VarUI8FromI1");
|
|
break;
|
|
case 439:
|
|
sprintf(name, "VarUI8FromUI2");
|
|
break;
|
|
case 440:
|
|
sprintf(name, "VarUI8FromUI4");
|
|
break;
|
|
case 441:
|
|
sprintf(name, "VarUI8FromDec");
|
|
break;
|
|
case 442:
|
|
sprintf(name, "RegisterTypeLibForUser");
|
|
break;
|
|
case 443:
|
|
sprintf(name, "UnRegisterTypeLibForUser");
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (name[0] == '\0')
|
|
sprintf(name, "ord%u", ord);
|
|
|
|
return cli_strdup(name);
|
|
}
|
|
|
|
#define PE_MAXIMPORTS 1024
|
|
#define PE_MAXNAMESIZE 256
|
|
static inline int scan_pe_impfuncs(cli_ctx *ctx, void *md5ctx, struct pe_image_import_descriptor *image, char *dllname, struct cli_exe_section *exe_sections, uint16_t nsections, uint32_t hdr_size, int pe_plus, int *first) {
|
|
uint32_t toff, offset;
|
|
fmap_t *map = *ctx->fmap;
|
|
size_t dlllen = 0, fsize = map->len;
|
|
int i, j, err, num_funcs = 0;
|
|
const char *buffer;
|
|
#if HAVE_JSON
|
|
json_object *imptbl = NULL;
|
|
#endif
|
|
|
|
toff = cli_rawaddr(image->u.OriginalFirstThunk, exe_sections, nsections, &err, fsize, hdr_size);
|
|
if (err)
|
|
toff = cli_rawaddr(image->FirstThunk, exe_sections, nsections, &err, fsize, hdr_size);
|
|
if (err) {
|
|
cli_dbgmsg("IMPTBL: invalid rva for image first thunk\n");
|
|
return CL_SUCCESS;
|
|
}
|
|
|
|
#if HAVE_JSON
|
|
if (ctx->wrkproperty) {
|
|
imptbl = cli_jsonarray(ctx->wrkproperty, "ImportTable");
|
|
if (!imptbl) {
|
|
cli_dbgmsg("IMPTBL: cannot allocate import table json object\n");
|
|
return CL_EMEM;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
if (!pe_plus) {
|
|
struct pe_image_thunk32 thunk32;
|
|
|
|
while (fmap_readn(map, &thunk32, toff, sizeof(struct pe_image_thunk32)) == sizeof(struct pe_image_thunk32) &&
|
|
thunk32.u.Ordinal != 0 && num_funcs < PE_MAXIMPORTS) {
|
|
char *funcname = NULL;
|
|
toff += sizeof(struct pe_image_thunk32);
|
|
|
|
if (!(thunk32.u.Ordinal & IMAGE_ORDINAL_FLAG32)) {
|
|
offset = cli_rawaddr(thunk32.u.Function, exe_sections, nsections, &err, fsize, hdr_size);
|
|
|
|
if (offset >= 0) {
|
|
/* Hint field is a uint16_t and precedes the Name field */
|
|
if ((buffer = fmap_need_off_once(map, offset+sizeof(uint16_t), MIN(PE_MAXNAMESIZE, fsize-offset))) != NULL) {
|
|
funcname = strndup(buffer, MIN(PE_MAXNAMESIZE, fsize-offset));
|
|
if (funcname == NULL) {
|
|
cli_dbgmsg("IMPTBL: cannot duplicate function name\n");
|
|
return CL_EMEM;
|
|
}
|
|
}
|
|
}
|
|
} else {
|
|
/* ordinal lookup */
|
|
funcname = pe_ordinal(dllname, thunk32.u.Ordinal & 0xFFFF);
|
|
if (funcname == NULL) {
|
|
cli_dbgmsg("IMPTBL: cannot duplicate function name\n");
|
|
return CL_EMEM;
|
|
}
|
|
}
|
|
|
|
if (funcname) {
|
|
char *fname;
|
|
size_t funclen;
|
|
|
|
//cli_dbgmsg("IMPTBL: FUNC: %s\n", funcname);
|
|
|
|
if (dlllen == 0) {
|
|
char* ext = strstr(dllname, ".");
|
|
|
|
if (ext && (strncasecmp(ext, ".ocx", 4) == 0 ||
|
|
strncasecmp(ext, ".sys", 4) == 0 ||
|
|
strncasecmp(ext, ".dll", 4) == 0))
|
|
dlllen = ext - dllname;
|
|
else
|
|
dlllen = strlen(dllname);
|
|
}
|
|
|
|
funclen = strlen(funcname);
|
|
|
|
fname = cli_calloc(funclen + dlllen + 3, sizeof(char));
|
|
if (fname == NULL) {
|
|
cli_dbgmsg("IMPTBL: cannot allocate memory for imphash string\n");
|
|
return CL_EMEM;
|
|
}
|
|
j = 0;
|
|
if (!*first)
|
|
fname[j++] = ',';
|
|
for (i = 0; i < dlllen; i++, j++)
|
|
fname[j] = tolower(dllname[i]);
|
|
fname[j++] = '.';
|
|
for (i = 0; i < funclen; i++, j++)
|
|
fname[j] = tolower(funcname[i]);
|
|
|
|
/* JSON TOMFOOLERY */
|
|
#if HAVE_JSON
|
|
if (imptbl) {
|
|
char *jname = *first ? fname : fname+1;
|
|
cli_jsonstr(imptbl, NULL, jname);
|
|
}
|
|
#endif
|
|
|
|
cli_dbgmsg("%u %s\n", strlen(fname), fname);
|
|
|
|
cl_update_hash(md5ctx, fname, strlen(fname));
|
|
|
|
*first = 0;
|
|
free(fname);
|
|
free(funcname);
|
|
}
|
|
}
|
|
} else {
|
|
struct pe_image_thunk64 thunk64;
|
|
|
|
while (fmap_readn(map, &thunk64, toff, sizeof(struct pe_image_thunk64)) == sizeof(struct pe_image_thunk64) &&
|
|
thunk64.u.Ordinal != 0 && num_funcs < PE_MAXIMPORTS) {
|
|
char *funcname = NULL;
|
|
toff += sizeof(struct pe_image_thunk64);
|
|
|
|
if (!(thunk64.u.Ordinal & IMAGE_ORDINAL_FLAG32)) {
|
|
offset = cli_rawaddr(thunk64.u.Function, exe_sections, nsections, &err, fsize, hdr_size);
|
|
|
|
if (offset >= 0) {
|
|
/* Hint field is a uint16_t and precedes the Name field */
|
|
if ((buffer = fmap_need_off_once(map, offset+sizeof(uint16_t), MIN(PE_MAXNAMESIZE, fsize-offset))) != NULL) {
|
|
funcname = strndup(buffer, MIN(PE_MAXNAMESIZE, fsize-offset));
|
|
if (funcname == NULL) {
|
|
cli_dbgmsg("IMPTBL: cannot duplicate function name\n");
|
|
return CL_EMEM;
|
|
}
|
|
}
|
|
}
|
|
} else {
|
|
/* ordinal lookup */
|
|
funcname = cli_strdup(pe_ordinal(dllname, thunk64.u.Ordinal & 0xFFFF));
|
|
if (funcname == NULL) {
|
|
cli_dbgmsg("IMPTBL: cannot duplicate function name\n");
|
|
return CL_EMEM;
|
|
}
|
|
}
|
|
|
|
if (funcname) {
|
|
char *fname;
|
|
size_t funclen;
|
|
|
|
/* JSON TOMFOOLERY */
|
|
//cli_dbgmsg("IMPTBL: FUNC: %s\n", funcname);
|
|
|
|
if (dlllen == 0) {
|
|
char* ext = strstr(dllname, ".");
|
|
|
|
if (ext && (strncasecmp(ext, ".ocx", 4) == 0 ||
|
|
strncasecmp(ext, ".sys", 4) == 0 ||
|
|
strncasecmp(ext, ".dll", 4) == 0))
|
|
dlllen = ext - dllname;
|
|
else
|
|
dlllen = strlen(dllname);
|
|
}
|
|
|
|
funclen = strlen(funcname);
|
|
|
|
fname = cli_calloc(funclen + dlllen + 3, sizeof(char));
|
|
if (fname == NULL) {
|
|
cli_dbgmsg("IMPTBL: cannot allocate memory for imphash string\n");
|
|
return CL_EMEM;
|
|
}
|
|
j = 0;
|
|
if (!*first)
|
|
fname[j++] = ',';
|
|
else
|
|
*first = 0;
|
|
for (i = 0; i < dlllen; i++, j++)
|
|
fname[j] = tolower(dllname[i]);
|
|
fname[j++] = '.';
|
|
for (i = 0; i < funclen; i++, j++)
|
|
fname[j] = tolower(funcname[i]);
|
|
|
|
cli_dbgmsg("%u %s\n", strlen(fname), fname);
|
|
|
|
cl_update_hash(md5ctx, fname, strlen(fname));
|
|
|
|
free(fname);
|
|
free(funcname);
|
|
}
|
|
}
|
|
}
|
|
|
|
return CL_SUCCESS;
|
|
}
|
|
|
|
static int scan_pe_imptbl(cli_ctx *ctx, struct pe_image_data_dir *dirs, struct cli_exe_section *exe_sections, uint16_t nsections, uint32_t hdr_size, int pe_plus) {
|
|
struct cli_matcher *ith = ctx->engine->hm_ith;
|
|
struct pe_image_data_dir *datadir = &(dirs[1]);
|
|
struct pe_image_import_descriptor *image;
|
|
fmap_t *map = *ctx->fmap;
|
|
size_t left, fsize = map->len;
|
|
uint32_t impoff, offset;
|
|
const char *impdes, *buffer, *virname;
|
|
void *md5ctx;
|
|
uint8_t digest[16] = {0};
|
|
char *dstr;
|
|
int i, err, ret = CL_SUCCESS, num_imports = 0, first = 1;
|
|
|
|
if (datadir->VirtualAddress == 0 || datadir->Size == 0) {
|
|
cli_dbgmsg("IMPTBL: import table data directory does not exist\n");
|
|
return CL_SUCCESS;
|
|
}
|
|
|
|
impoff = cli_rawaddr(datadir->VirtualAddress, exe_sections, nsections, &err, fsize, hdr_size);
|
|
if (err || impoff + datadir->Size > fsize) {
|
|
cli_dbgmsg("IMPTBL: invalid rva for import table data\n");
|
|
return CL_SUCCESS;
|
|
}
|
|
|
|
impdes = fmap_need_off(map, impoff, datadir->Size);
|
|
if (impdes == NULL) {
|
|
cli_dbgmsg("IMPTBL: failed to acquire fmap buffer\n");
|
|
return CL_SUCCESS; /* real error: CL_EMAP? */
|
|
}
|
|
left = datadir->Size;
|
|
|
|
md5ctx = cl_hash_init("md5");
|
|
if (md5ctx == NULL)
|
|
return CL_EMEM;
|
|
|
|
image = (struct pe_image_import_descriptor *)impdes;
|
|
while(image->Name != 0 && num_imports < PE_MAXIMPORTS && left > sizeof(struct pe_image_import_descriptor)) {
|
|
char *dllname = NULL;
|
|
|
|
left -= sizeof(struct pe_image_import_descriptor);
|
|
num_imports++;
|
|
|
|
/* DLL name aquisition */
|
|
offset = cli_rawaddr(image->Name, exe_sections, nsections, &err, fsize, hdr_size);
|
|
if (err || offset > fsize) {
|
|
cli_dbgmsg("IMPTBL: invalid rva for dll name\n");
|
|
/* ignore or return? */
|
|
/*
|
|
image++;
|
|
continue;
|
|
*/
|
|
cl_hash_destroy(md5ctx);
|
|
return CL_SUCCESS; /* error value? continue? */
|
|
}
|
|
|
|
if ((buffer = fmap_need_off_once(map, offset, MIN(PE_MAXNAMESIZE, fsize-offset))) != NULL) {
|
|
/* sanitize dllname? */
|
|
dllname = strndup(buffer, MIN(PE_MAXNAMESIZE, fsize-offset));
|
|
if (dllname == NULL) {
|
|
cli_dbgmsg("IMPTBL: cannot duplicate dll name\n");
|
|
cl_hash_destroy(md5ctx);
|
|
return CL_EMEM;
|
|
}
|
|
|
|
//cli_dbgmsg("IMPTBL: DLL: %s\n", dllname);
|
|
/* JSON TOMFOOLERY */
|
|
}
|
|
|
|
/* DLL function handling - inline function TODO - dconf this */
|
|
ret = scan_pe_impfuncs(ctx, md5ctx, image, dllname, exe_sections, nsections, hdr_size, pe_plus, &first);
|
|
if (dllname)
|
|
free(dllname);
|
|
if (ret != CL_SUCCESS) {
|
|
cl_hash_destroy(md5ctx);
|
|
return ret;
|
|
}
|
|
|
|
image++;
|
|
}
|
|
|
|
fmap_unneed_off(map, impoff, datadir->Size);
|
|
|
|
/* send off for md5 comparison - use ret */
|
|
cl_finish_hash(md5ctx, digest);
|
|
dstr = cli_str2hex(digest, sizeof(digest));
|
|
cli_dbgmsg("IMPHASH: %s\n", (char *)dstr);
|
|
#if HAVE_JSON
|
|
if (ctx->wrkproperty)
|
|
cli_jsonstr(ctx->wrkproperty, "Imphash", dstr);
|
|
#endif
|
|
free(dstr);
|
|
|
|
if (ith && (ret = cli_hm_scan_wild(digest, &virname, ith, CLI_HASH_MD5)) == CL_VIRUS)
|
|
cli_append_virus(ctx, virname);
|
|
|
|
return ret;
|
|
}
|
|
|
|
#if HAVE_JSON
|
|
static struct json_object *get_pe_property(cli_ctx *ctx)
|
|
{
|
|
struct json_object *pe;
|
|
|
|
if (!(ctx) || !(ctx->wrkproperty))
|
|
return NULL;
|
|
|
|
if (!json_object_object_get_ex(ctx->wrkproperty, "PE", &pe)) {
|
|
pe = json_object_new_object();
|
|
if (!(pe))
|
|
return NULL;
|
|
|
|
json_object_object_add(ctx->wrkproperty, "PE", pe);
|
|
}
|
|
|
|
return pe;
|
|
}
|
|
|
|
static void pe_add_heuristic_property(cli_ctx *ctx, const char *key)
|
|
{
|
|
struct json_object *heuristics;
|
|
struct json_object *pe;
|
|
struct json_object *str;
|
|
|
|
pe = get_pe_property(ctx);
|
|
if (!(pe))
|
|
return;
|
|
|
|
if (!json_object_object_get_ex(pe, "Heuristics", &heuristics)) {
|
|
heuristics = json_object_new_array();
|
|
if (!(heuristics))
|
|
return;
|
|
|
|
json_object_object_add(pe, "Heuristics", heuristics);
|
|
}
|
|
|
|
str = json_object_new_string(key);
|
|
if (!(str))
|
|
return;
|
|
|
|
json_object_array_add(heuristics, str);
|
|
}
|
|
|
|
static struct json_object *get_section_json(cli_ctx *ctx)
|
|
{
|
|
struct json_object *pe;
|
|
struct json_object *section;
|
|
|
|
pe = get_pe_property(ctx);
|
|
if (!(pe))
|
|
return NULL;
|
|
|
|
if (!json_object_object_get_ex(pe, "Sections", §ion)) {
|
|
section = json_object_new_array();
|
|
if (!(section))
|
|
return NULL;
|
|
|
|
json_object_object_add(pe, "Sections", section);
|
|
}
|
|
|
|
return section;
|
|
}
|
|
|
|
static void add_section_info(cli_ctx *ctx, struct cli_exe_section *s)
|
|
{
|
|
struct json_object *sections, *section, *obj;
|
|
char address[16];
|
|
|
|
sections = get_section_json(ctx);
|
|
if (!(sections))
|
|
return;
|
|
|
|
section = json_object_new_object();
|
|
if (!(section))
|
|
return;
|
|
|
|
obj = json_object_new_int((int32_t)(s->rsz));
|
|
if (!(obj))
|
|
return;
|
|
|
|
json_object_object_add(section, "RawSize", obj);
|
|
|
|
obj = json_object_new_int((int32_t)(s->raw));
|
|
if (!(obj))
|
|
return;
|
|
|
|
json_object_object_add(section, "RawOffset", obj);
|
|
|
|
snprintf(address, sizeof(address), "0x%08x", s->rva);
|
|
|
|
obj = json_object_new_string(address);
|
|
if (!(obj))
|
|
return;
|
|
|
|
json_object_object_add(section, "VirtualAddress", obj);
|
|
|
|
obj = json_object_new_boolean((s->chr & 0x20000000) == 0x20000000);
|
|
if ((obj))
|
|
json_object_object_add(section, "Executable", obj);
|
|
|
|
obj = json_object_new_boolean((s->chr & 0x80000000) == 0x80000000);
|
|
if ((obj))
|
|
json_object_object_add(section, "Writable", obj);
|
|
|
|
obj = json_object_new_boolean(s->urva>>31 || s->uvsz>>31 || (s->rsz && s->uraw>>31) || s->ursz>>31);
|
|
if ((obj))
|
|
json_object_object_add(section, "Signed", obj);
|
|
|
|
json_object_array_add(sections, section);
|
|
}
|
|
#endif
|
|
|
|
int cli_scanpe(cli_ctx *ctx)
|
|
{
|
|
uint16_t e_magic; /* DOS signature ("MZ") */
|
|
uint16_t nsections;
|
|
uint32_t e_lfanew; /* address of new exe header */
|
|
uint32_t ep, vep; /* entry point (raw, virtual) */
|
|
uint8_t polipos = 0;
|
|
time_t timestamp;
|
|
struct pe_image_file_hdr file_hdr;
|
|
union {
|
|
struct pe_image_optional_hdr64 opt64;
|
|
struct pe_image_optional_hdr32 opt32;
|
|
} pe_opt;
|
|
struct pe_image_section_hdr *section_hdr;
|
|
char sname[9], epbuff[4096], *tempfile;
|
|
uint32_t epsize;
|
|
ssize_t bytes, at;
|
|
unsigned int i, j, found, upx_success = 0, min = 0, max = 0, err, overlays = 0, rescan = 1;
|
|
unsigned int ssize = 0, dsize = 0, dll = 0, pe_plus = 0, corrupted_cur;
|
|
int (*upxfn)(const char *, uint32_t, char *, uint32_t *, uint32_t, uint32_t, uint32_t) = NULL;
|
|
const char *src = NULL;
|
|
char *dest = NULL;
|
|
int ndesc, ret = CL_CLEAN, upack = 0, native=0;
|
|
size_t fsize;
|
|
uint32_t valign, falign, hdr_size;
|
|
struct cli_exe_section *exe_sections;
|
|
char timestr[32];
|
|
struct pe_image_data_dir *dirs;
|
|
struct cli_bc_ctx *bc_ctx;
|
|
fmap_t *map;
|
|
struct cli_pe_hook_data pedata;
|
|
#ifdef HAVE__INTERNAL__SHA_COLLECT
|
|
int sha_collect = ctx->sha_collect;
|
|
#endif
|
|
const char *archtype=NULL, *subsystem=NULL;
|
|
uint32_t viruses_found = 0;
|
|
#if HAVE_JSON
|
|
int toval = 0;
|
|
struct json_object *pe_json=NULL;
|
|
char jsonbuf[128];
|
|
#endif
|
|
|
|
if(!ctx) {
|
|
cli_errmsg("cli_scanpe: ctx == NULL\n");
|
|
return CL_ENULLARG;
|
|
}
|
|
|
|
#if HAVE_JSON
|
|
if (cli_json_timeout_cycle_check(ctx, &toval) != CL_SUCCESS) {
|
|
return CL_ETIMEOUT;
|
|
}
|
|
|
|
if (ctx->options & CL_SCAN_FILE_PROPERTIES) {
|
|
pe_json = get_pe_property(ctx);
|
|
}
|
|
#endif
|
|
map = *ctx->fmap;
|
|
if(fmap_readn(map, &e_magic, 0, sizeof(e_magic)) != sizeof(e_magic)) {
|
|
cli_dbgmsg("Can't read DOS signature\n");
|
|
return CL_CLEAN;
|
|
}
|
|
|
|
if(EC16(e_magic) != PE_IMAGE_DOS_SIGNATURE && EC16(e_magic) != PE_IMAGE_DOS_SIGNATURE_OLD) {
|
|
cli_dbgmsg("Invalid DOS signature\n");
|
|
return CL_CLEAN;
|
|
}
|
|
|
|
if(fmap_readn(map, &e_lfanew, 58 + sizeof(e_magic), sizeof(e_lfanew)) != sizeof(e_lfanew)) {
|
|
cli_dbgmsg("Can't read new header address\n");
|
|
/* truncated header? */
|
|
if(DETECT_BROKEN_PE) {
|
|
cli_append_virus(ctx,"Heuristics.Broken.Executable");
|
|
return CL_VIRUS;
|
|
}
|
|
|
|
return CL_CLEAN;
|
|
}
|
|
|
|
e_lfanew = EC32(e_lfanew);
|
|
cli_dbgmsg("e_lfanew == %d\n", e_lfanew);
|
|
if(!e_lfanew) {
|
|
cli_dbgmsg("Not a PE file\n");
|
|
return CL_CLEAN;
|
|
}
|
|
|
|
if(fmap_readn(map, &file_hdr, e_lfanew, sizeof(struct pe_image_file_hdr)) != sizeof(struct pe_image_file_hdr)) {
|
|
/* bad information in e_lfanew - probably not a PE file */
|
|
cli_dbgmsg("Can't read file header\n");
|
|
return CL_CLEAN;
|
|
}
|
|
|
|
if(EC32(file_hdr.Magic) != PE_IMAGE_NT_SIGNATURE) {
|
|
cli_dbgmsg("Invalid PE signature (probably NE file)\n");
|
|
return CL_CLEAN;
|
|
}
|
|
|
|
if(EC16(file_hdr.Characteristics) & 0x2000) {
|
|
#if HAVE_JSON
|
|
if (pe_json != NULL)
|
|
cli_jsonstr(pe_json, "Type", "DLL");
|
|
#endif
|
|
cli_dbgmsg("File type: DLL\n");
|
|
dll = 1;
|
|
} else if(EC16(file_hdr.Characteristics) & 0x01) {
|
|
#if HAVE_JSON
|
|
if (pe_json != NULL)
|
|
cli_jsonstr(pe_json, "Type", "EXE");
|
|
#endif
|
|
cli_dbgmsg("File type: Executable\n");
|
|
}
|
|
|
|
switch(EC16(file_hdr.Machine)) {
|
|
case 0x0:
|
|
archtype = "Unknown";
|
|
break;
|
|
case 0x14c:
|
|
archtype = "80386";
|
|
break;
|
|
case 0x14d:
|
|
archtype = "80486";
|
|
break;
|
|
case 0x14e:
|
|
archtype = "80586";
|
|
break;
|
|
case 0x160:
|
|
archtype = "R30000 (big-endian)";
|
|
break;
|
|
case 0x162:
|
|
archtype = "R3000";
|
|
break;
|
|
case 0x166:
|
|
archtype = "R4000";
|
|
break;
|
|
case 0x168:
|
|
archtype = "R10000";
|
|
break;
|
|
case 0x184:
|
|
archtype = "DEC Alpha AXP";
|
|
break;
|
|
case 0x284:
|
|
archtype = "DEC Alpha AXP 64bit";
|
|
break;
|
|
case 0x1f0:
|
|
archtype = "PowerPC";
|
|
break;
|
|
case 0x200:
|
|
archtype = "IA64";
|
|
break;
|
|
case 0x268:
|
|
archtype = "M68k";
|
|
break;
|
|
case 0x266:
|
|
archtype = "MIPS16";
|
|
break;
|
|
case 0x366:
|
|
archtype = "MIPS+FPU";
|
|
break;
|
|
case 0x466:
|
|
archtype = "MIPS16+FPU";
|
|
break;
|
|
case 0x1a2:
|
|
archtype = "Hitachi SH3";
|
|
break;
|
|
case 0x1a3:
|
|
archtype = "Hitachi SH3-DSP";
|
|
break;
|
|
case 0x1a4:
|
|
archtype = "Hitachi SH3-E";
|
|
break;
|
|
case 0x1a6:
|
|
archtype = "Hitachi SH4";
|
|
break;
|
|
case 0x1a8:
|
|
archtype = "Hitachi SH5";
|
|
break;
|
|
case 0x1c0:
|
|
archtype = "ARM";
|
|
break;
|
|
case 0x1c2:
|
|
archtype = "THUMB";
|
|
break;
|
|
case 0x1d3:
|
|
archtype = "AM33";
|
|
break;
|
|
case 0x520:
|
|
archtype = "Infineon TriCore";
|
|
break;
|
|
case 0xcef:
|
|
archtype = "CEF";
|
|
break;
|
|
case 0xebc:
|
|
archtype = "EFI Byte Code";
|
|
break;
|
|
case 0x9041:
|
|
archtype = "M32R";
|
|
break;
|
|
case 0xc0ee:
|
|
archtype = "CEEE";
|
|
break;
|
|
case 0x8664:
|
|
archtype = "AMD64";
|
|
break;
|
|
default:
|
|
archtype = "Unknown";
|
|
}
|
|
|
|
if ((archtype)) {
|
|
cli_dbgmsg("Machine type: %s\n", archtype);
|
|
#if HAVE_JSON
|
|
if (pe_json != NULL)
|
|
cli_jsonstr(pe_json, "ArchType", archtype);
|
|
#endif
|
|
}
|
|
|
|
nsections = EC16(file_hdr.NumberOfSections);
|
|
if(nsections < 1 || nsections > 96) {
|
|
#if HAVE_JSON
|
|
pe_add_heuristic_property(ctx, "BadNumberOfSections");
|
|
#endif
|
|
if(DETECT_BROKEN_PE) {
|
|
cli_append_virus(ctx,"Heuristics.Broken.Executable");
|
|
return CL_VIRUS;
|
|
}
|
|
|
|
if(!ctx->corrupted_input) {
|
|
if(nsections)
|
|
cli_warnmsg("PE file contains %d sections\n", nsections);
|
|
else
|
|
cli_warnmsg("PE file contains no sections\n");
|
|
}
|
|
|
|
return CL_CLEAN;
|
|
}
|
|
|
|
cli_dbgmsg("NumberOfSections: %d\n", nsections);
|
|
|
|
timestamp = (time_t) EC32(file_hdr.TimeDateStamp);
|
|
cli_dbgmsg("TimeDateStamp: %s", cli_ctime(×tamp, timestr, sizeof(timestr)));
|
|
|
|
#if HAVE_JSON
|
|
if (pe_json != NULL)
|
|
cli_jsonstr(pe_json, "TimeDateStamp", cli_ctime(×tamp, timestr, sizeof(timestr)));
|
|
#endif
|
|
|
|
cli_dbgmsg("SizeOfOptionalHeader: %x\n", EC16(file_hdr.SizeOfOptionalHeader));
|
|
|
|
#if HAVE_JSON
|
|
if (pe_json != NULL)
|
|
cli_jsonint(pe_json, "SizeOfOptionalHeader", EC16(file_hdr.SizeOfOptionalHeader));
|
|
#endif
|
|
|
|
if (EC16(file_hdr.SizeOfOptionalHeader) < sizeof(struct pe_image_optional_hdr32)) {
|
|
#if HAVE_JSON
|
|
pe_add_heuristic_property(ctx, "BadOptionalHeaderSize");
|
|
#endif
|
|
cli_dbgmsg("SizeOfOptionalHeader too small\n");
|
|
if(DETECT_BROKEN_PE) {
|
|
cli_append_virus(ctx,"Heuristics.Broken.Executable");
|
|
return CL_VIRUS;
|
|
}
|
|
|
|
return CL_CLEAN;
|
|
}
|
|
|
|
at = e_lfanew + sizeof(struct pe_image_file_hdr);
|
|
if(fmap_readn(map, &optional_hdr32, at, sizeof(struct pe_image_optional_hdr32)) != sizeof(struct pe_image_optional_hdr32)) {
|
|
cli_dbgmsg("Can't read optional file header\n");
|
|
if(DETECT_BROKEN_PE) {
|
|
cli_append_virus(ctx,"Heuristics.Broken.Executable");
|
|
return CL_VIRUS;
|
|
}
|
|
|
|
return CL_CLEAN;
|
|
}
|
|
at += sizeof(struct pe_image_optional_hdr32);
|
|
|
|
/* This will be a chicken and egg problem until we drop 9x */
|
|
if(EC16(optional_hdr64.Magic)==PE32P_SIGNATURE) {
|
|
#if HAVE_JSON
|
|
pe_add_heuristic_property(ctx, "BadOptionalHeaderSizePE32Plus");
|
|
#endif
|
|
if(EC16(file_hdr.SizeOfOptionalHeader)!=sizeof(struct pe_image_optional_hdr64)) {
|
|
/* FIXME: need to play around a bit more with xp64 */
|
|
cli_dbgmsg("Incorrect SizeOfOptionalHeader for PE32+\n");
|
|
|
|
if(DETECT_BROKEN_PE) {
|
|
cli_append_virus(ctx,"Heuristics.Broken.Executable");
|
|
return CL_VIRUS;
|
|
}
|
|
|
|
return CL_CLEAN;
|
|
}
|
|
pe_plus = 1;
|
|
}
|
|
|
|
if(!pe_plus) { /* PE */
|
|
if (EC16(file_hdr.SizeOfOptionalHeader)!=sizeof(struct pe_image_optional_hdr32)) {
|
|
/* Seek to the end of the long header */
|
|
at += EC16(file_hdr.SizeOfOptionalHeader)-sizeof(struct pe_image_optional_hdr32);
|
|
}
|
|
|
|
if(DCONF & PE_CONF_UPACK)
|
|
upack = (EC16(file_hdr.SizeOfOptionalHeader)==0x148);
|
|
|
|
vep = EC32(optional_hdr32.AddressOfEntryPoint);
|
|
hdr_size = EC32(optional_hdr32.SizeOfHeaders);
|
|
cli_dbgmsg("File format: PE\n");
|
|
|
|
cli_dbgmsg("MajorLinkerVersion: %d\n", optional_hdr32.MajorLinkerVersion);
|
|
cli_dbgmsg("MinorLinkerVersion: %d\n", optional_hdr32.MinorLinkerVersion);
|
|
cli_dbgmsg("SizeOfCode: 0x%x\n", EC32(optional_hdr32.SizeOfCode));
|
|
cli_dbgmsg("SizeOfInitializedData: 0x%x\n", EC32(optional_hdr32.SizeOfInitializedData));
|
|
cli_dbgmsg("SizeOfUninitializedData: 0x%x\n", EC32(optional_hdr32.SizeOfUninitializedData));
|
|
cli_dbgmsg("AddressOfEntryPoint: 0x%x\n", vep);
|
|
cli_dbgmsg("BaseOfCode: 0x%x\n", EC32(optional_hdr32.BaseOfCode));
|
|
cli_dbgmsg("SectionAlignment: 0x%x\n", EC32(optional_hdr32.SectionAlignment));
|
|
cli_dbgmsg("FileAlignment: 0x%x\n", EC32(optional_hdr32.FileAlignment));
|
|
cli_dbgmsg("MajorSubsystemVersion: %d\n", EC16(optional_hdr32.MajorSubsystemVersion));
|
|
cli_dbgmsg("MinorSubsystemVersion: %d\n", EC16(optional_hdr32.MinorSubsystemVersion));
|
|
cli_dbgmsg("SizeOfImage: 0x%x\n", EC32(optional_hdr32.SizeOfImage));
|
|
cli_dbgmsg("SizeOfHeaders: 0x%x\n", hdr_size);
|
|
cli_dbgmsg("NumberOfRvaAndSizes: %d\n", EC32(optional_hdr32.NumberOfRvaAndSizes));
|
|
dirs = optional_hdr32.DataDirectory;
|
|
#if HAVE_JSON
|
|
if (pe_json != NULL) {
|
|
cli_jsonint(pe_json, "MajorLinkerVersion", optional_hdr32.MajorLinkerVersion);
|
|
cli_jsonint(pe_json, "MinorLinkerVersion", optional_hdr32.MinorLinkerVersion);
|
|
cli_jsonint(pe_json, "SizeOfCode", EC32(optional_hdr32.SizeOfCode));
|
|
cli_jsonint(pe_json, "SizeOfInitializedData", EC32(optional_hdr32.SizeOfInitializedData));
|
|
cli_jsonint(pe_json, "SizeOfUninitializedData", EC32(optional_hdr32.SizeOfUninitializedData));
|
|
cli_jsonint(pe_json, "NumberOfRvaAndSizes", EC32(optional_hdr32.NumberOfRvaAndSizes));
|
|
cli_jsonint(pe_json, "MajorSubsystemVersion", EC16(optional_hdr32.MajorSubsystemVersion));
|
|
cli_jsonint(pe_json, "MinorSubsystemVersion", EC16(optional_hdr32.MinorSubsystemVersion));
|
|
|
|
snprintf(jsonbuf, sizeof(jsonbuf), "0x%x", EC32(optional_hdr32.BaseOfCode));
|
|
cli_jsonstr(pe_json, "BaseOfCode", jsonbuf);
|
|
|
|
snprintf(jsonbuf, sizeof(jsonbuf), "0x%x", EC32(optional_hdr32.SectionAlignment));
|
|
cli_jsonstr(pe_json, "SectionAlignment", jsonbuf);
|
|
|
|
snprintf(jsonbuf, sizeof(jsonbuf), "0x%x", EC32(optional_hdr32.FileAlignment));
|
|
cli_jsonstr(pe_json, "FileAlignment", jsonbuf);
|
|
|
|
snprintf(jsonbuf, sizeof(jsonbuf), "0x%x", EC32(optional_hdr32.SizeOfImage));
|
|
cli_jsonstr(pe_json, "SizeOfImage", jsonbuf);
|
|
|
|
snprintf(jsonbuf, sizeof(jsonbuf), "0x%x", hdr_size);
|
|
cli_jsonstr(pe_json, "SizeOfHeaders", jsonbuf);
|
|
}
|
|
#endif
|
|
|
|
} else { /* PE+ */
|
|
/* read the remaining part of the header */
|
|
if(fmap_readn(map, &optional_hdr32 + 1, at, sizeof(struct pe_image_optional_hdr64) - sizeof(struct pe_image_optional_hdr32)) != sizeof(struct pe_image_optional_hdr64) - sizeof(struct pe_image_optional_hdr32)) {
|
|
cli_dbgmsg("Can't read optional file header\n");
|
|
if(DETECT_BROKEN_PE) {
|
|
cli_append_virus(ctx,"Heuristics.Broken.Executable");
|
|
return CL_VIRUS;
|
|
}
|
|
|
|
return CL_CLEAN;
|
|
}
|
|
|
|
at += sizeof(struct pe_image_optional_hdr64) - sizeof(struct pe_image_optional_hdr32);
|
|
vep = EC32(optional_hdr64.AddressOfEntryPoint);
|
|
hdr_size = EC32(optional_hdr64.SizeOfHeaders);
|
|
cli_dbgmsg("File format: PE32+\n");
|
|
|
|
cli_dbgmsg("MajorLinkerVersion: %d\n", optional_hdr64.MajorLinkerVersion);
|
|
cli_dbgmsg("MinorLinkerVersion: %d\n", optional_hdr64.MinorLinkerVersion);
|
|
cli_dbgmsg("SizeOfCode: 0x%x\n", EC32(optional_hdr64.SizeOfCode));
|
|
cli_dbgmsg("SizeOfInitializedData: 0x%x\n", EC32(optional_hdr64.SizeOfInitializedData));
|
|
cli_dbgmsg("SizeOfUninitializedData: 0x%x\n", EC32(optional_hdr64.SizeOfUninitializedData));
|
|
cli_dbgmsg("AddressOfEntryPoint: 0x%x\n", vep);
|
|
cli_dbgmsg("BaseOfCode: 0x%x\n", EC32(optional_hdr64.BaseOfCode));
|
|
cli_dbgmsg("SectionAlignment: 0x%x\n", EC32(optional_hdr64.SectionAlignment));
|
|
cli_dbgmsg("FileAlignment: 0x%x\n", EC32(optional_hdr64.FileAlignment));
|
|
cli_dbgmsg("MajorSubsystemVersion: %d\n", EC16(optional_hdr64.MajorSubsystemVersion));
|
|
cli_dbgmsg("MinorSubsystemVersion: %d\n", EC16(optional_hdr64.MinorSubsystemVersion));
|
|
cli_dbgmsg("SizeOfImage: 0x%x\n", EC32(optional_hdr64.SizeOfImage));
|
|
cli_dbgmsg("SizeOfHeaders: 0x%x\n", hdr_size);
|
|
cli_dbgmsg("NumberOfRvaAndSizes: %d\n", EC32(optional_hdr64.NumberOfRvaAndSizes));
|
|
dirs = optional_hdr64.DataDirectory;
|
|
#if HAVE_JSON
|
|
if (pe_json != NULL) {
|
|
cli_jsonint(pe_json, "MajorLinkerVersion", optional_hdr64.MajorLinkerVersion);
|
|
cli_jsonint(pe_json, "MinorLinkerVersion", optional_hdr64.MinorLinkerVersion);
|
|
cli_jsonint(pe_json, "SizeOfCode", EC32(optional_hdr64.SizeOfCode));
|
|
cli_jsonint(pe_json, "SizeOfInitializedData", EC32(optional_hdr64.SizeOfInitializedData));
|
|
cli_jsonint(pe_json, "SizeOfUninitializedData", EC32(optional_hdr64.SizeOfUninitializedData));
|
|
cli_jsonint(pe_json, "NumberOfRvaAndSizes", EC32(optional_hdr64.NumberOfRvaAndSizes));
|
|
cli_jsonint(pe_json, "MajorSubsystemVersion", EC16(optional_hdr64.MajorSubsystemVersion));
|
|
cli_jsonint(pe_json, "MinorSubsystemVersion", EC16(optional_hdr64.MinorSubsystemVersion));
|
|
|
|
snprintf(jsonbuf, sizeof(jsonbuf), "0x%x", EC32(optional_hdr64.BaseOfCode));
|
|
cli_jsonstr(pe_json, "BaseOfCode", jsonbuf);
|
|
|
|
snprintf(jsonbuf, sizeof(jsonbuf), "0x%x", EC32(optional_hdr64.SectionAlignment));
|
|
cli_jsonstr(pe_json, "SectionAlignment", jsonbuf);
|
|
|
|
snprintf(jsonbuf, sizeof(jsonbuf), "0x%x", EC32(optional_hdr64.FileAlignment));
|
|
cli_jsonstr(pe_json, "FileAlignment", jsonbuf);
|
|
|
|
snprintf(jsonbuf, sizeof(jsonbuf), "0x%x", EC32(optional_hdr64.SizeOfImage));
|
|
cli_jsonstr(pe_json, "SizeOfImage", jsonbuf);
|
|
|
|
snprintf(jsonbuf, sizeof(jsonbuf), "0x%x", hdr_size);
|
|
cli_jsonstr(pe_json, "SizeOfHeaders", jsonbuf);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
#if HAVE_JSON
|
|
if (ctx->options & CL_SCAN_FILE_PROPERTIES) {
|
|
snprintf(jsonbuf, sizeof(jsonbuf), "0x%x", vep);
|
|
if (pe_json != NULL)
|
|
cli_jsonstr(pe_json, "EntryPoint", jsonbuf);
|
|
}
|
|
#endif
|
|
|
|
|
|
switch(pe_plus ? EC16(optional_hdr64.Subsystem) : EC16(optional_hdr32.Subsystem)) {
|
|
case 0:
|
|
subsystem = "Unknown";
|
|
break;
|
|
case 1:
|
|
subsystem = "Native (svc)";
|
|
native = 1;
|
|
break;
|
|
case 2:
|
|
subsystem = "Win32 GUI";
|
|
break;
|
|
case 3:
|
|
subsystem = "Win32 console";
|
|
break;
|
|
case 5:
|
|
subsystem = "OS/2 console";
|
|
break;
|
|
case 7:
|
|
subsystem = "POSIX console";
|
|
break;
|
|
case 8:
|
|
subsystem = "Native Win9x driver";
|
|
break;
|
|
case 9:
|
|
subsystem = "WinCE GUI";
|
|
break;
|
|
case 10:
|
|
subsystem = "EFI application";
|
|
break;
|
|
case 11:
|
|
subsystem = "EFI driver";
|
|
break;
|
|
case 12:
|
|
subsystem = "EFI runtime driver";
|
|
break;
|
|
case 13:
|
|
subsystem = "EFI ROM image";
|
|
break;
|
|
case 14:
|
|
subsystem = "Xbox";
|
|
break;
|
|
case 16:
|
|
subsystem = "Boot application";
|
|
break;
|
|
default:
|
|
subsystem = "Unknown";
|
|
}
|
|
|
|
cli_dbgmsg("Subsystem: %s\n", subsystem);
|
|
|
|
#if HAVE_JSON
|
|
if (pe_json != NULL)
|
|
cli_jsonstr(pe_json, "Subsystem", subsystem);
|
|
#endif
|
|
|
|
cli_dbgmsg("------------------------------------\n");
|
|
|
|
if (DETECT_BROKEN_PE && !native && (!(pe_plus?EC32(optional_hdr64.SectionAlignment):EC32(optional_hdr32.SectionAlignment)) || (pe_plus?EC32(optional_hdr64.SectionAlignment):EC32(optional_hdr32.SectionAlignment))%0x1000)) {
|
|
cli_dbgmsg("Bad virtual alignemnt\n");
|
|
cli_append_virus(ctx,"Heuristics.Broken.Executable");
|
|
return CL_VIRUS;
|
|
}
|
|
|
|
if (DETECT_BROKEN_PE && !native && (!(pe_plus?EC32(optional_hdr64.FileAlignment):EC32(optional_hdr32.FileAlignment)) || (pe_plus?EC32(optional_hdr64.FileAlignment):EC32(optional_hdr32.FileAlignment))%0x200)) {
|
|
cli_dbgmsg("Bad file alignemnt\n");
|
|
cli_append_virus(ctx, "Heuristics.Broken.Executable");
|
|
return CL_VIRUS;
|
|
}
|
|
|
|
fsize = map->len;
|
|
|
|
section_hdr = (struct pe_image_section_hdr *) cli_calloc(nsections, sizeof(struct pe_image_section_hdr));
|
|
|
|
if(!section_hdr) {
|
|
cli_dbgmsg("Can't allocate memory for section headers\n");
|
|
return CL_EMEM;
|
|
}
|
|
|
|
exe_sections = (struct cli_exe_section *) cli_calloc(nsections, sizeof(struct cli_exe_section));
|
|
|
|
if(!exe_sections) {
|
|
cli_dbgmsg("Can't allocate memory for section headers\n");
|
|
free(section_hdr);
|
|
return CL_EMEM;
|
|
}
|
|
|
|
valign = (pe_plus)?EC32(optional_hdr64.SectionAlignment):EC32(optional_hdr32.SectionAlignment);
|
|
falign = (pe_plus)?EC32(optional_hdr64.FileAlignment):EC32(optional_hdr32.FileAlignment);
|
|
|
|
if(fmap_readn(map, section_hdr, at, sizeof(struct pe_image_section_hdr)*nsections) != (int)(nsections*sizeof(struct pe_image_section_hdr))) {
|
|
cli_dbgmsg("Can't read section header\n");
|
|
cli_dbgmsg("Possibly broken PE file\n");
|
|
|
|
free(section_hdr);
|
|
free(exe_sections);
|
|
|
|
if(DETECT_BROKEN_PE) {
|
|
cli_append_virus(ctx,"Heuristics.Broken.Executable");
|
|
return CL_VIRUS;
|
|
}
|
|
|
|
return CL_CLEAN;
|
|
}
|
|
|
|
at += sizeof(struct pe_image_section_hdr)*nsections;
|
|
|
|
for(i = 0; falign!=0x200 && i<nsections; i++) {
|
|
/* file alignment fallback mode - blah */
|
|
if (falign && section_hdr[i].SizeOfRawData && EC32(section_hdr[i].PointerToRawData)%falign && !(EC32(section_hdr[i].PointerToRawData)%0x200)) {
|
|
cli_dbgmsg("Found misaligned section, using 0x200\n");
|
|
falign = 0x200;
|
|
}
|
|
}
|
|
|
|
hdr_size = PESALIGN(hdr_size, valign); /* Aligned headers virtual size */
|
|
|
|
#if HAVE_JSON
|
|
if (pe_json != NULL)
|
|
cli_jsonint(pe_json, "NumberOfSections", nsections);
|
|
#endif
|
|
|
|
while (rescan==1) {
|
|
rescan=0;
|
|
for (i=0; i < nsections; i++) {
|
|
exe_sections[i].rva = PEALIGN(EC32(section_hdr[i].VirtualAddress), valign);
|
|
exe_sections[i].vsz = PESALIGN(EC32(section_hdr[i].VirtualSize), valign);
|
|
exe_sections[i].raw = PEALIGN(EC32(section_hdr[i].PointerToRawData), falign);
|
|
exe_sections[i].rsz = PESALIGN(EC32(section_hdr[i].SizeOfRawData), falign);
|
|
exe_sections[i].chr = EC32(section_hdr[i].Characteristics);
|
|
exe_sections[i].urva = EC32(section_hdr[i].VirtualAddress); /* Just in case */
|
|
exe_sections[i].uvsz = EC32(section_hdr[i].VirtualSize);
|
|
exe_sections[i].uraw = EC32(section_hdr[i].PointerToRawData);
|
|
exe_sections[i].ursz = EC32(section_hdr[i].SizeOfRawData);
|
|
|
|
if (exe_sections[i].rsz) { /* Don't bother with virtual only sections */
|
|
if (exe_sections[i].raw >= fsize || exe_sections[i].uraw > fsize) {
|
|
cli_dbgmsg("Broken PE file - Section %d starts or exists beyond the end of file (Offset@ %lu, Total filesize %lu)\n", i, (unsigned long)exe_sections[i].raw, (unsigned long)fsize);
|
|
if (nsections == 1) {
|
|
free(section_hdr);
|
|
free(exe_sections);
|
|
|
|
if(DETECT_BROKEN_PE) {
|
|
cli_append_virus(ctx, "Heuristics.Broken.Executable");
|
|
return CL_VIRUS;
|
|
}
|
|
|
|
return CL_CLEAN; /* no ninjas to see here! move along! */
|
|
}
|
|
|
|
for (j=i; j < nsections-1; j++)
|
|
memcpy(&exe_sections[j], &exe_sections[j+1], sizeof(struct cli_exe_section));
|
|
|
|
for (j=i; j < nsections-1; j++)
|
|
memcpy(§ion_hdr[j], §ion_hdr[j+1], sizeof(struct pe_image_section_hdr));
|
|
|
|
nsections--;
|
|
rescan=1;
|
|
break;
|
|
}
|
|
|
|
if (!CLI_ISCONTAINED(0, (uint32_t) fsize, exe_sections[i].raw, exe_sections[i].rsz))
|
|
exe_sections[i].rsz = fsize - exe_sections[i].raw;
|
|
|
|
if (!CLI_ISCONTAINED(0, fsize, exe_sections[i].uraw, exe_sections[i].ursz))
|
|
exe_sections[i].ursz = fsize - exe_sections[i].uraw;
|
|
}
|
|
}
|
|
}
|
|
|
|
for(i = 0; i < nsections; i++) {
|
|
strncpy(sname, (char *) section_hdr[i].Name, 8);
|
|
sname[8] = 0;
|
|
|
|
#if HAVE_JSON
|
|
add_section_info(ctx, &exe_sections[i]);
|
|
|
|
if (cli_json_timeout_cycle_check(ctx, &toval) != CL_SUCCESS) {
|
|
free(section_hdr);
|
|
free(exe_sections);
|
|
return CL_ETIMEOUT;
|
|
}
|
|
#endif
|
|
|
|
if (!exe_sections[i].vsz && exe_sections[i].rsz)
|
|
exe_sections[i].vsz=PESALIGN(exe_sections[i].ursz, valign);
|
|
|
|
cli_dbgmsg("Section %d\n", i);
|
|
cli_dbgmsg("Section name: %s\n", sname);
|
|
cli_dbgmsg("Section data (from headers - in memory)\n");
|
|
cli_dbgmsg("VirtualSize: 0x%x 0x%x\n", exe_sections[i].uvsz, exe_sections[i].vsz);
|
|
cli_dbgmsg("VirtualAddress: 0x%x 0x%x\n", exe_sections[i].urva, exe_sections[i].rva);
|
|
cli_dbgmsg("SizeOfRawData: 0x%x 0x%x\n", exe_sections[i].ursz, exe_sections[i].rsz);
|
|
cli_dbgmsg("PointerToRawData: 0x%x 0x%x\n", exe_sections[i].uraw, exe_sections[i].raw);
|
|
|
|
if(exe_sections[i].chr & 0x20) {
|
|
cli_dbgmsg("Section contains executable code\n");
|
|
|
|
if(exe_sections[i].vsz < exe_sections[i].rsz) {
|
|
cli_dbgmsg("Section contains free space\n");
|
|
/*
|
|
cli_dbgmsg("Dumping %d bytes\n", section_hdr.SizeOfRawData - section_hdr.VirtualSize);
|
|
ddump(desc, section_hdr.PointerToRawData + section_hdr.VirtualSize, section_hdr.SizeOfRawData - section_hdr.VirtualSize, cli_gentemp(NULL));
|
|
*/
|
|
}
|
|
}
|
|
|
|
if(exe_sections[i].chr & 0x20000000)
|
|
cli_dbgmsg("Section's memory is executable\n");
|
|
|
|
if(exe_sections[i].chr & 0x80000000)
|
|
cli_dbgmsg("Section's memory is writeable\n");
|
|
|
|
if (DETECT_BROKEN_PE && (!valign || (exe_sections[i].urva % valign))) { /* Bad virtual alignment */
|
|
cli_dbgmsg("VirtualAddress is misaligned\n");
|
|
cli_dbgmsg("------------------------------------\n");
|
|
cli_append_virus(ctx, "Heuristics.Broken.Executable");
|
|
free(section_hdr);
|
|
free(exe_sections);
|
|
return CL_VIRUS;
|
|
}
|
|
|
|
if (exe_sections[i].rsz) { /* Don't bother with virtual only sections */
|
|
if(SCAN_ALGO && (DCONF & PE_CONF_POLIPOS) && !*sname && exe_sections[i].vsz > 40000 && exe_sections[i].vsz < 70000 && exe_sections[i].chr == 0xe0000060) polipos = i;
|
|
|
|
/* check hash section sigs */
|
|
if((DCONF & PE_CONF_MD5SECT) && ctx->engine->hm_mdb) {
|
|
ret = scan_pe_mdb(ctx, &exe_sections[i]);
|
|
if (ret != CL_CLEAN) {
|
|
if (ret != CL_VIRUS)
|
|
cli_errmsg("scan_pe: scan_pe_mdb failed: %s!\n", cl_strerror(ret));
|
|
|
|
cli_dbgmsg("------------------------------------\n");
|
|
free(section_hdr);
|
|
free(exe_sections);
|
|
return ret;
|
|
}
|
|
}
|
|
}
|
|
cli_dbgmsg("------------------------------------\n");
|
|
|
|
if (exe_sections[i].urva>>31 || exe_sections[i].uvsz>>31 || (exe_sections[i].rsz && exe_sections[i].uraw>>31) || exe_sections[i].ursz>>31) {
|
|
cli_dbgmsg("Found PE values with sign bit set\n");
|
|
|
|
free(section_hdr);
|
|
free(exe_sections);
|
|
if(DETECT_BROKEN_PE) {
|
|
cli_append_virus(ctx, "Heuristics.Broken.Executable");
|
|
return CL_VIRUS;
|
|
}
|
|
|
|
return CL_CLEAN;
|
|
}
|
|
|
|
if(!i) {
|
|
if (DETECT_BROKEN_PE && exe_sections[i].urva!=hdr_size) { /* Bad first section RVA */
|
|
cli_dbgmsg("First section is in the wrong place\n");
|
|
cli_append_virus(ctx, "Heuristics.Broken.Executable");
|
|
free(section_hdr);
|
|
free(exe_sections);
|
|
return CL_VIRUS;
|
|
}
|
|
|
|
min = exe_sections[i].rva;
|
|
max = exe_sections[i].rva + exe_sections[i].rsz;
|
|
} else {
|
|
if (DETECT_BROKEN_PE && exe_sections[i].urva - exe_sections[i-1].urva != exe_sections[i-1].vsz) { /* No holes, no overlapping, no virtual disorder */
|
|
cli_dbgmsg("Virtually misplaced section (wrong order, overlapping, non contiguous)\n");
|
|
cli_append_virus(ctx, "Heuristics.Broken.Executable");
|
|
free(section_hdr);
|
|
free(exe_sections);
|
|
return CL_VIRUS;
|
|
}
|
|
|
|
if(exe_sections[i].rva < min)
|
|
min = exe_sections[i].rva;
|
|
|
|
if(exe_sections[i].rva + exe_sections[i].rsz > max) {
|
|
max = exe_sections[i].rva + exe_sections[i].rsz;
|
|
overlays = exe_sections[i].raw + exe_sections[i].rsz;
|
|
}
|
|
}
|
|
}
|
|
|
|
free(section_hdr);
|
|
|
|
if(!(ep = cli_rawaddr(vep, exe_sections, nsections, &err, fsize, hdr_size)) && err) {
|
|
cli_dbgmsg("EntryPoint out of file\n");
|
|
free(exe_sections);
|
|
if(DETECT_BROKEN_PE) {
|
|
cli_append_virus(ctx,"Heuristics.Broken.Executable");
|
|
return CL_VIRUS;
|
|
}
|
|
|
|
return CL_CLEAN;
|
|
}
|
|
|
|
#if HAVE_JSON
|
|
if (pe_json != NULL)
|
|
cli_jsonint(pe_json, "EntryPointOffset", ep);
|
|
|
|
if (cli_json_timeout_cycle_check(ctx, &toval) != CL_SUCCESS) {
|
|
return CL_ETIMEOUT;
|
|
}
|
|
#endif
|
|
|
|
cli_dbgmsg("EntryPoint offset: 0x%x (%d)\n", ep, ep);
|
|
|
|
if(pe_plus) { /* Do not continue for PE32+ files */
|
|
free(exe_sections);
|
|
return CL_CLEAN;
|
|
}
|
|
|
|
epsize = fmap_readn(map, epbuff, ep, 4096);
|
|
|
|
|
|
/* Disasm scan disabled since it's now handled by the bytecode */
|
|
|
|
/* CLI_UNPTEMP("DISASM",(exe_sections,0)); */
|
|
/* if(disasmbuf((unsigned char*)epbuff, epsize, ndesc)) */
|
|
/* ret = cli_scandesc(ndesc, ctx, CL_TYPE_PE_DISASM, 1, NULL, AC_SCAN_VIR); */
|
|
/* close(ndesc); */
|
|
/* CLI_TMPUNLK(); */
|
|
/* free(tempfile); */
|
|
/* if(ret == CL_VIRUS) { */
|
|
/* free(exe_sections); */
|
|
/* return ret; */
|
|
/* } */
|
|
|
|
if(overlays) {
|
|
int overlays_sz = fsize - overlays;
|
|
if(overlays_sz > 0) {
|
|
ret = cli_scanishield(ctx, overlays, overlays_sz);
|
|
if(ret != CL_CLEAN) {
|
|
free(exe_sections);
|
|
return ret;
|
|
}
|
|
}
|
|
}
|
|
|
|
pedata.nsections = nsections;
|
|
pedata.ep = ep;
|
|
pedata.offset = 0;
|
|
memcpy(&pedata.file_hdr, &file_hdr, sizeof(file_hdr));
|
|
memcpy(&pedata.opt32, &pe_opt.opt32, sizeof(pe_opt.opt32));
|
|
memcpy(&pedata.opt64, &pe_opt.opt64, sizeof(pe_opt.opt64));
|
|
memcpy(&pedata.dirs, dirs, sizeof(pedata.dirs));
|
|
pedata.e_lfanew = e_lfanew;
|
|
pedata.overlays = overlays;
|
|
pedata.overlays_sz = fsize - overlays;
|
|
pedata.hdr_size = hdr_size;
|
|
|
|
/* Bytecode BC_PE_ALL hook */
|
|
bc_ctx = cli_bytecode_context_alloc();
|
|
if (!bc_ctx) {
|
|
cli_errmsg("cli_scanpe: can't allocate memory for bc_ctx\n");
|
|
free(exe_sections);
|
|
return CL_EMEM;
|
|
}
|
|
|
|
cli_bytecode_context_setpe(bc_ctx, &pedata, exe_sections);
|
|
cli_bytecode_context_setctx(bc_ctx, ctx);
|
|
ret = cli_bytecode_runhook(ctx, ctx->engine, bc_ctx, BC_PE_ALL, map);
|
|
switch (ret) {
|
|
case CL_ENULLARG:
|
|
cli_warnmsg("cli_scanpe: NULL argument supplied\n");
|
|
break;
|
|
case CL_VIRUS:
|
|
case CL_BREAK:
|
|
free(exe_sections);
|
|
cli_bytecode_context_destroy(bc_ctx);
|
|
return ret == CL_VIRUS ? CL_VIRUS : CL_CLEAN;
|
|
}
|
|
cli_bytecode_context_destroy(bc_ctx);
|
|
|
|
/* Attempt to run scans on import table */
|
|
/* Run if there are existing signatures and/or preclassing */
|
|
if (ctx->dconf->pe & PE_CONF_IMPTBL) {
|
|
ret = scan_pe_imptbl(ctx, dirs, exe_sections, nsections, hdr_size, pe_plus);
|
|
switch (ret) {
|
|
case CL_ENULLARG:
|
|
cli_warnmsg("cli_scanpe: NULL argument supplied\n");
|
|
break;
|
|
case CL_VIRUS:
|
|
if (SCAN_ALL)
|
|
break;
|
|
/* intentional fall-through */
|
|
case CL_BREAK:
|
|
free(exe_sections);
|
|
return ret == CL_VIRUS ? CL_VIRUS : CL_CLEAN;
|
|
}
|
|
}
|
|
/* Attempt to detect some popular polymorphic viruses */
|
|
|
|
/* W32.Parite.B */
|
|
if(SCAN_ALGO && (DCONF & PE_CONF_PARITE) && !dll && epsize == 4096 && ep == exe_sections[nsections - 1].raw) {
|
|
const char *pt = cli_memstr(epbuff, 4040, "\x47\x65\x74\x50\x72\x6f\x63\x41\x64\x64\x72\x65\x73\x73\x00", 15);
|
|
if(pt) {
|
|
pt += 15;
|
|
if((((uint32_t)cli_readint32(pt) ^ (uint32_t)cli_readint32(pt + 4)) == 0x505a4f) && (((uint32_t)cli_readint32(pt + 8) ^ (uint32_t)cli_readint32(pt + 12)) == 0xffffb) && (((uint32_t)cli_readint32(pt + 16) ^ (uint32_t)cli_readint32(pt + 20)) == 0xb8)) {
|
|
cli_append_virus(ctx,"Heuristics.W32.Parite.B");
|
|
if (!SCAN_ALL) {
|
|
free(exe_sections);
|
|
return CL_VIRUS;
|
|
}
|
|
|
|
viruses_found++;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Kriz */
|
|
if(SCAN_ALGO && (DCONF & PE_CONF_KRIZ) && epsize >= 200 && CLI_ISCONTAINED(exe_sections[nsections - 1].raw, exe_sections[nsections - 1].rsz, ep, 0x0fd2) && epbuff[1]=='\x9c' && epbuff[2]=='\x60') {
|
|
enum {KZSTRASH,KZSCDELTA,KZSPDELTA,KZSGETSIZE,KZSXORPRFX,KZSXOR,KZSDDELTA,KZSLOOP,KZSTOP};
|
|
uint8_t kzs[] = {KZSTRASH,KZSCDELTA,KZSPDELTA,KZSGETSIZE,KZSTRASH,KZSXORPRFX,KZSXOR,KZSTRASH,KZSDDELTA,KZSTRASH,KZSLOOP,KZSTOP};
|
|
uint8_t *kzstate = kzs;
|
|
uint8_t *kzcode = (uint8_t *)epbuff + 3;
|
|
uint8_t kzdptr=0xff, kzdsize=0xff;
|
|
int kzlen = 197, kzinitlen=0xffff, kzxorlen=-1;
|
|
cli_dbgmsg("in kriz\n");
|
|
|
|
while(*kzstate!=KZSTOP) {
|
|
uint8_t op;
|
|
if(kzlen<=6)
|
|
break;
|
|
|
|
op = *kzcode++;
|
|
kzlen--;
|
|
|
|
switch (*kzstate) {
|
|
case KZSTRASH:
|
|
case KZSGETSIZE: {
|
|
int opsz=0;
|
|
switch(op) {
|
|
case 0x81:
|
|
kzcode+=5;
|
|
kzlen-=5;
|
|
break;
|
|
case 0xb8:
|
|
case 0xb9:
|
|
case 0xba:
|
|
case 0xbb:
|
|
case 0xbd:
|
|
case 0xbe:
|
|
case 0xbf:
|
|
if(*kzstate==KZSGETSIZE && cli_readint32(kzcode)==0x0fd2) {
|
|
kzinitlen = kzlen-5;
|
|
kzdsize=op-0xb8;
|
|
kzstate++;
|
|
op=4; /* fake the register to avoid breaking out */
|
|
|
|
cli_dbgmsg("kriz: using #%d as size counter\n", kzdsize);
|
|
}
|
|
opsz=4;
|
|
case 0x48:
|
|
case 0x49:
|
|
case 0x4a:
|
|
case 0x4b:
|
|
case 0x4d:
|
|
case 0x4e:
|
|
case 0x4f:
|
|
op&=7;
|
|
if(op!=kzdptr && op!=kzdsize) {
|
|
kzcode+=opsz;
|
|
kzlen-=opsz;
|
|
break;
|
|
}
|
|
default:
|
|
kzcode--;
|
|
kzlen++;
|
|
kzstate++;
|
|
}
|
|
|
|
break;
|
|
}
|
|
case KZSCDELTA:
|
|
if(op==0xe8 && (uint32_t)cli_readint32(kzcode) < 0xff) {
|
|
kzlen-=*kzcode+4;
|
|
kzcode+=*kzcode+4;
|
|
kzstate++;
|
|
} else {
|
|
*kzstate=KZSTOP;
|
|
}
|
|
|
|
break;
|
|
case KZSPDELTA:
|
|
if((op&0xf8)==0x58 && (kzdptr=op-0x58)!=4) {
|
|
kzstate++;
|
|
cli_dbgmsg("kriz: using #%d as pointer\n", kzdptr);
|
|
} else {
|
|
*kzstate=KZSTOP;
|
|
}
|
|
|
|
break;
|
|
case KZSXORPRFX:
|
|
kzstate++;
|
|
if(op==0x3e)
|
|
break;
|
|
case KZSXOR:
|
|
if (op==0x80 && *kzcode==kzdptr+0xb0) {
|
|
kzxorlen=kzlen;
|
|
kzcode+=+6;
|
|
kzlen-=+6;
|
|
kzstate++;
|
|
} else {
|
|
*kzstate=KZSTOP;
|
|
}
|
|
|
|
break;
|
|
case KZSDDELTA:
|
|
if (op==kzdptr+0x48)
|
|
kzstate++;
|
|
else
|
|
*kzstate=KZSTOP;
|
|
|
|
break;
|
|
case KZSLOOP:
|
|
if (op==kzdsize+0x48 && *kzcode==0x75 && kzlen-(int8_t)kzcode[1]-3<=kzinitlen && kzlen-(int8_t)kzcode[1]>=kzxorlen) {
|
|
cli_append_virus(ctx,"Heuristics.W32.Kriz");
|
|
if (!SCAN_ALL) {
|
|
free(exe_sections);
|
|
return CL_VIRUS;
|
|
}
|
|
|
|
viruses_found++;
|
|
}
|
|
|
|
cli_dbgmsg("kriz: loop out of bounds, corrupted sample?\n");
|
|
kzstate++;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* W32.Magistr.A/B */
|
|
if(SCAN_ALGO && (DCONF & PE_CONF_MAGISTR) && !dll && (nsections>1) && (exe_sections[nsections - 1].chr & 0x80000000)) {
|
|
uint32_t rsize, vsize, dam = 0;
|
|
|
|
vsize = exe_sections[nsections - 1].uvsz;
|
|
rsize = exe_sections[nsections - 1].rsz;
|
|
if(rsize < exe_sections[nsections - 1].ursz) {
|
|
rsize = exe_sections[nsections - 1].ursz;
|
|
dam = 1;
|
|
}
|
|
|
|
if(vsize >= 0x612c && rsize >= 0x612c && ((vsize & 0xff) == 0xec)) {
|
|
int bw = rsize < 0x7000 ? rsize : 0x7000;
|
|
const char *tbuff;
|
|
|
|
if((tbuff = fmap_need_off_once(map, exe_sections[nsections - 1].raw + rsize - bw, 4096))) {
|
|
if(cli_memstr(tbuff, 4091, "\xe8\x2c\x61\x00\x00", 5)) {
|
|
cli_append_virus(ctx, dam ? "Heuristics.W32.Magistr.A.dam" : "Heuristics.W32.Magistr.A");
|
|
if (!SCAN_ALL) {
|
|
free(exe_sections);
|
|
return CL_VIRUS;
|
|
}
|
|
|
|
viruses_found++;
|
|
}
|
|
}
|
|
} else if(rsize >= 0x7000 && vsize >= 0x7000 && ((vsize & 0xff) == 0xed)) {
|
|
int bw = rsize < 0x8000 ? rsize : 0x8000;
|
|
const char *tbuff;
|
|
|
|
if((tbuff = fmap_need_off_once(map, exe_sections[nsections - 1].raw + rsize - bw, 4096))) {
|
|
if(cli_memstr(tbuff, 4091, "\xe8\x04\x72\x00\x00", 5)) {
|
|
cli_append_virus(ctx,dam ? "Heuristics.W32.Magistr.B.dam" : "Heuristics.W32.Magistr.B");
|
|
if (!SCAN_ALL) {
|
|
free(exe_sections);
|
|
return CL_VIRUS;
|
|
}
|
|
|
|
viruses_found++;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/* W32.Polipos.A */
|
|
while(polipos && !dll && nsections > 2 && nsections < 13 && e_lfanew <= 0x800 && (EC16(optional_hdr32.Subsystem) == 2 || EC16(optional_hdr32.Subsystem) == 3) && EC16(file_hdr.Machine) == 0x14c && optional_hdr32.SizeOfStackReserve >= 0x80000) {
|
|
uint32_t jump, jold, *jumps = NULL;
|
|
const uint8_t *code;
|
|
unsigned int xsjs = 0;
|
|
|
|
if(exe_sections[0].rsz > CLI_MAX_ALLOCATION)
|
|
break;
|
|
if(exe_sections[0].rsz < 5)
|
|
break;
|
|
if(!(code=fmap_need_off_once(map, exe_sections[0].raw, exe_sections[0].rsz)))
|
|
break;
|
|
|
|
for(i=0; i<exe_sections[0].rsz - 5; i++) {
|
|
if((uint8_t)(code[i]-0xe8) > 1)
|
|
continue;
|
|
|
|
jump = cli_rawaddr(exe_sections[0].rva+i+5+cli_readint32(&code[i+1]), exe_sections, nsections, &err, fsize, hdr_size);
|
|
if(err || !CLI_ISCONTAINED(exe_sections[polipos].raw, exe_sections[polipos].rsz, jump, 9))
|
|
continue;
|
|
|
|
if(xsjs % 128 == 0) {
|
|
if(xsjs == 1280)
|
|
break;
|
|
|
|
if(!(jumps=(uint32_t *)cli_realloc2(jumps, (xsjs+128)*sizeof(uint32_t)))) {
|
|
free(exe_sections);
|
|
return CL_EMEM;
|
|
}
|
|
}
|
|
|
|
j=0;
|
|
for(; j<xsjs; j++) {
|
|
if(jumps[j]<jump)
|
|
continue;
|
|
if(jumps[j]==jump) {
|
|
xsjs--;
|
|
break;
|
|
}
|
|
|
|
jold=jumps[j];
|
|
jumps[j]=jump;
|
|
jump=jold;
|
|
}
|
|
|
|
jumps[j]=jump;
|
|
xsjs++;
|
|
}
|
|
|
|
if(!xsjs)
|
|
break;
|
|
|
|
cli_dbgmsg("Polipos: Checking %d xsect jump(s)\n", xsjs);
|
|
for(i=0;i<xsjs;i++) {
|
|
if(!(code = fmap_need_off_once(map, jumps[i], 9)))
|
|
continue;
|
|
|
|
if((jump=cli_readint32(code))==0x60ec8b55 || (code[4]==0x0ec && ((jump==0x83ec8b55 && code[6]==0x60) || (jump==0x81ec8b55 && !code[7] && !code[8])))) {
|
|
cli_append_virus(ctx,"Heuristics.W32.Polipos.A");
|
|
if (!SCAN_ALL) {
|
|
free(jumps);
|
|
free(exe_sections);
|
|
return CL_VIRUS;
|
|
}
|
|
|
|
viruses_found++;
|
|
}
|
|
}
|
|
|
|
free(jumps);
|
|
break;
|
|
}
|
|
|
|
/* Trojan.Swizzor.Gen */
|
|
if (SCAN_ALGO && (DCONF & PE_CONF_SWIZZOR) && nsections > 1 && fsize > 64*1024 && fsize < 4*1024*1024) {
|
|
if(dirs[2].Size) {
|
|
struct swizz_stats *stats = cli_calloc(1, sizeof(*stats));
|
|
unsigned int m = 1000;
|
|
ret = CL_CLEAN;
|
|
|
|
if (!stats) {
|
|
ret = CL_EMEM;
|
|
} else {
|
|
cli_parseres_special(EC32(dirs[2].VirtualAddress), EC32(dirs[2].VirtualAddress), map, exe_sections, nsections, fsize, hdr_size, 0, 0, &m, stats);
|
|
if ((ret = cli_detect_swizz(stats)) == CL_VIRUS)
|
|
cli_append_virus(ctx,"Heuristics.Trojan.Swizzor.Gen");
|
|
|
|
free(stats);
|
|
}
|
|
if (ret != CL_CLEAN) {
|
|
if (!(ret == CL_VIRUS && SCAN_ALL)) {
|
|
free(exe_sections);
|
|
return ret;
|
|
}
|
|
|
|
viruses_found++;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/* !!!!!!!!!!!!!! PACKERS START HERE !!!!!!!!!!!!!! */
|
|
corrupted_cur = ctx->corrupted_input;
|
|
ctx->corrupted_input = 2; /* caller will reset on return */
|
|
|
|
|
|
/* UPX, FSG, MEW support */
|
|
|
|
/* try to find the first section with physical size == 0 */
|
|
found = 0;
|
|
if(DCONF & (PE_CONF_UPX | PE_CONF_FSG | PE_CONF_MEW)) {
|
|
for(i = 0; i < (unsigned int) nsections - 1; i++) {
|
|
if(!exe_sections[i].rsz && exe_sections[i].vsz && exe_sections[i + 1].rsz && exe_sections[i + 1].vsz) {
|
|
found = 1;
|
|
cli_dbgmsg("UPX/FSG/MEW: empty section found - assuming compression\n");
|
|
#if HAVE_JSON
|
|
if (pe_json != NULL)
|
|
cli_jsonbool(pe_json, "HasEmptySection", 1);
|
|
#endif
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* MEW support */
|
|
if (found && (DCONF & PE_CONF_MEW) && epsize>=16 && epbuff[0]=='\xe9') {
|
|
uint32_t fileoffset;
|
|
const char *tbuff;
|
|
|
|
fileoffset = (vep + cli_readint32(epbuff + 1) + 5);
|
|
while (fileoffset == 0x154 || fileoffset == 0x158) {
|
|
char *src;
|
|
uint32_t offdiff, uselzma;
|
|
|
|
cli_dbgmsg ("MEW: found MEW characteristics %08X + %08X + 5 = %08X\n",
|
|
cli_readint32(epbuff + 1), vep, cli_readint32(epbuff + 1) + vep + 5);
|
|
|
|
if(!(tbuff = fmap_need_off_once(map, fileoffset, 0xb0)))
|
|
break;
|
|
|
|
if (fileoffset == 0x154)
|
|
cli_dbgmsg("MEW: Win9x compatibility was set!\n");
|
|
else
|
|
cli_dbgmsg("MEW: Win9x compatibility was NOT set!\n");
|
|
|
|
if((offdiff = cli_readint32(tbuff+1) - EC32(optional_hdr32.ImageBase)) <= exe_sections[i + 1].rva || offdiff >= exe_sections[i + 1].rva + exe_sections[i + 1].raw - 4) {
|
|
cli_dbgmsg("MEW: ESI is not in proper section\n");
|
|
break;
|
|
}
|
|
|
|
offdiff -= exe_sections[i + 1].rva;
|
|
|
|
if(!exe_sections[i + 1].rsz) {
|
|
cli_dbgmsg("MEW: mew section is empty\n");
|
|
break;
|
|
}
|
|
|
|
ssize = exe_sections[i + 1].vsz;
|
|
dsize = exe_sections[i].vsz;
|
|
|
|
cli_dbgmsg("MEW: ssize %08x dsize %08x offdiff: %08x\n", ssize, dsize, offdiff);
|
|
|
|
CLI_UNPSIZELIMITS("MEW", MAX(ssize, dsize));
|
|
CLI_UNPSIZELIMITS("MEW", MAX(ssize + dsize, exe_sections[i + 1].rsz));
|
|
|
|
if (exe_sections[i + 1].rsz < offdiff + 12 || exe_sections[i + 1].rsz > ssize) {
|
|
cli_dbgmsg("MEW: Size mismatch: %08x\n", exe_sections[i + 1].rsz);
|
|
break;
|
|
}
|
|
|
|
/* allocate needed buffer */
|
|
if (!(src = cli_calloc (ssize + dsize, sizeof(char)))) {
|
|
free(exe_sections);
|
|
return CL_EMEM;
|
|
}
|
|
|
|
if((bytes = fmap_readn(map, src + dsize, exe_sections[i + 1].raw, exe_sections[i + 1].rsz)) != exe_sections[i + 1].rsz) {
|
|
cli_dbgmsg("MEW: Can't read %d bytes [read: %lu]\n", exe_sections[i + 1].rsz, (unsigned long)bytes);
|
|
free(exe_sections);
|
|
free(src);
|
|
return CL_EREAD;
|
|
}
|
|
|
|
cli_dbgmsg("MEW: %u (%08x) bytes read\n", (unsigned int)bytes, (unsigned int)bytes);
|
|
|
|
/* count offset to lzma proc, if lzma used, 0xe8 -> call */
|
|
if (tbuff[0x7b] == '\xe8') {
|
|
if (!CLI_ISCONTAINED(exe_sections[1].rva, exe_sections[1].vsz, cli_readint32(tbuff + 0x7c) + fileoffset + 0x80, 4)) {
|
|
cli_dbgmsg("MEW: lzma proc out of bounds!\n");
|
|
free(src);
|
|
break; /* to next unpacker in chain */
|
|
}
|
|
|
|
uselzma = cli_readint32(tbuff + 0x7c) - (exe_sections[0].rva - fileoffset - 0x80);
|
|
} else {
|
|
uselzma = 0;
|
|
}
|
|
|
|
#if HAVE_JSON
|
|
if (pe_json != NULL)
|
|
cli_jsonstr(pe_json, "Packer", "MEW");
|
|
#endif
|
|
|
|
CLI_UNPTEMP("MEW",(src,exe_sections,0));
|
|
CLI_UNPRESULTS("MEW",(unmew11(src, offdiff, ssize, dsize, EC32(optional_hdr32.ImageBase), exe_sections[0].rva, uselzma, ndesc)),1,(src,0));
|
|
break;
|
|
}
|
|
}
|
|
|
|
if(epsize<168) {
|
|
free(exe_sections);
|
|
return CL_CLEAN;
|
|
}
|
|
|
|
if (found || upack) {
|
|
/* Check EP for UPX vs. FSG vs. Upack */
|
|
|
|
/* Upack 0.39 produces 2 types of executables
|
|
* 3 sections: | 2 sections (one empty, I don't chech found if !upack, since it's in OR above):
|
|
* mov esi, value | pusha
|
|
* lodsd | call $+0x9
|
|
* push eax |
|
|
*
|
|
* Upack 1.1/1.2 Beta produces [based on 2 samples (sUx) provided by aCaB]:
|
|
* 2 sections
|
|
* mov esi, value
|
|
* loads
|
|
* mov edi, eax
|
|
*
|
|
* Upack unknown [sample 0297729]
|
|
* 3 sections
|
|
* mov esi, value
|
|
* push [esi]
|
|
* jmp
|
|
*
|
|
*/
|
|
/* upack 0.39-3s + sample 0151477*/
|
|
while(((upack && nsections == 3) && /* 3 sections */
|
|
((
|
|
epbuff[0] == '\xbe' && cli_readint32(epbuff + 1) - EC32(optional_hdr32.ImageBase) > min && /* mov esi */
|
|
epbuff[5] == '\xad' && epbuff[6] == '\x50' /* lodsd; push eax */
|
|
)
|
|
||
|
|
/* based on 0297729 sample from aCaB */
|
|
(epbuff[0] == '\xbe' && cli_readint32(epbuff + 1) - EC32(optional_hdr32.ImageBase) > min && /* mov esi */
|
|
epbuff[5] == '\xff' && epbuff[6] == '\x36' /* push [esi] */
|
|
)
|
|
))
|
|
||
|
|
((!upack && nsections == 2) && /* 2 sections */
|
|
(( /* upack 0.39-2s */
|
|
epbuff[0] == '\x60' && epbuff[1] == '\xe8' && cli_readint32(epbuff+2) == 0x9 /* pusha; call+9 */
|
|
)
|
|
||
|
|
( /* upack 1.1/1.2, based on 2 samples */
|
|
epbuff[0] == '\xbe' && cli_readint32(epbuff+1) - EC32(optional_hdr32.ImageBase) < min && /* mov esi */
|
|
cli_readint32(epbuff + 1) - EC32(optional_hdr32.ImageBase) > 0 &&
|
|
epbuff[5] == '\xad' && epbuff[6] == '\x8b' && epbuff[7] == '\xf8' /* loads; mov edi, eax */
|
|
)
|
|
))
|
|
) {
|
|
uint32_t vma, off;
|
|
int a,b,c;
|
|
|
|
cli_dbgmsg("Upack characteristics found.\n");
|
|
a = exe_sections[0].vsz;
|
|
b = exe_sections[1].vsz;
|
|
if (upack) {
|
|
cli_dbgmsg("Upack: var set\n");
|
|
|
|
c = exe_sections[2].vsz;
|
|
ssize = exe_sections[0].ursz + exe_sections[0].uraw;
|
|
off = exe_sections[0].rva;
|
|
vma = EC32(optional_hdr32.ImageBase) + exe_sections[0].rva;
|
|
} else {
|
|
cli_dbgmsg("Upack: var NOT set\n");
|
|
c = exe_sections[1].rva;
|
|
ssize = exe_sections[1].uraw;
|
|
off = 0;
|
|
vma = exe_sections[1].rva - exe_sections[1].uraw;
|
|
}
|
|
|
|
dsize = a+b+c;
|
|
|
|
CLI_UNPSIZELIMITS("Upack", MAX(MAX(dsize, ssize), exe_sections[1].ursz));
|
|
|
|
if (!CLI_ISCONTAINED(0, dsize, exe_sections[1].rva - off, exe_sections[1].ursz) || (upack && !CLI_ISCONTAINED(0, dsize, exe_sections[2].rva - exe_sections[0].rva, ssize)) || ssize > dsize) {
|
|
cli_dbgmsg("Upack: probably malformed pe-header, skipping to next unpacker\n");
|
|
break;
|
|
}
|
|
|
|
if((dest = (char *) cli_calloc(dsize, sizeof(char))) == NULL) {
|
|
free(exe_sections);
|
|
return CL_EMEM;
|
|
}
|
|
|
|
if((unsigned int)fmap_readn(map, dest, 0, ssize) != ssize) {
|
|
cli_dbgmsg("Upack: Can't read raw data of section 0\n");
|
|
free(dest);
|
|
break;
|
|
}
|
|
|
|
if(upack)
|
|
memmove(dest + exe_sections[2].rva - exe_sections[0].rva, dest, ssize);
|
|
|
|
if((unsigned int)fmap_readn(map, dest + exe_sections[1].rva - off, exe_sections[1].uraw, exe_sections[1].ursz) != exe_sections[1].ursz) {
|
|
cli_dbgmsg("Upack: Can't read raw data of section 1\n");
|
|
free(dest);
|
|
break;
|
|
}
|
|
|
|
#if HAVE_JSON
|
|
if (pe_json != NULL)
|
|
cli_jsonstr(pe_json, "Packer", "Upack");
|
|
#endif
|
|
|
|
CLI_UNPTEMP("Upack",(dest,exe_sections,0));
|
|
CLI_UNPRESULTS("Upack",(unupack(upack, dest, dsize, epbuff, vma, ep, EC32(optional_hdr32.ImageBase), exe_sections[0].rva, ndesc)),1,(dest,0));
|
|
|
|
break;
|
|
}
|
|
}
|
|
|
|
while(found && (DCONF & PE_CONF_FSG) && epbuff[0] == '\x87' && epbuff[1] == '\x25') {
|
|
const char *dst;
|
|
uint32_t newesi, newedi, newebx, newedx;
|
|
|
|
/* FSG v2.0 support - thanks to aCaB ! */
|
|
|
|
ssize = exe_sections[i + 1].rsz;
|
|
dsize = exe_sections[i].vsz;
|
|
|
|
CLI_UNPSIZELIMITS("FSG", MAX(dsize, ssize));
|
|
|
|
if(ssize <= 0x19 || dsize <= ssize) {
|
|
cli_dbgmsg("FSG: Size mismatch (ssize: %d, dsize: %d)\n", ssize, dsize);
|
|
free(exe_sections);
|
|
return CL_CLEAN;
|
|
}
|
|
|
|
newedx = cli_readint32(epbuff + 2) - EC32(optional_hdr32.ImageBase);
|
|
if(!CLI_ISCONTAINED(exe_sections[i + 1].rva, exe_sections[i + 1].rsz, newedx, 4)) {
|
|
cli_dbgmsg("FSG: xchg out of bounds (%x), giving up\n", newedx);
|
|
break;
|
|
}
|
|
|
|
if(!exe_sections[i + 1].rsz || !(src = fmap_need_off_once(map, exe_sections[i + 1].raw, ssize))) {
|
|
cli_dbgmsg("Can't read raw data of section %d\n", i + 1);
|
|
free(exe_sections);
|
|
return CL_ESEEK;
|
|
}
|
|
|
|
dst = src + newedx - exe_sections[i + 1].rva;
|
|
if(newedx < exe_sections[i + 1].rva || !CLI_ISCONTAINED(src, ssize, dst, 4)) {
|
|
cli_dbgmsg("FSG: New ESP out of bounds\n");
|
|
break;
|
|
}
|
|
|
|
newedx = cli_readint32(dst) - EC32(optional_hdr32.ImageBase);
|
|
if(!CLI_ISCONTAINED(exe_sections[i + 1].rva, exe_sections[i + 1].rsz, newedx, 4)) {
|
|
cli_dbgmsg("FSG: New ESP (%x) is wrong\n", newedx);
|
|
break;
|
|
}
|
|
|
|
dst = src + newedx - exe_sections[i + 1].rva;
|
|
if(!CLI_ISCONTAINED(src, ssize, dst, 32)) {
|
|
cli_dbgmsg("FSG: New stack out of bounds\n");
|
|
break;
|
|
}
|
|
|
|
newedi = cli_readint32(dst) - EC32(optional_hdr32.ImageBase);
|
|
newesi = cli_readint32(dst + 4) - EC32(optional_hdr32.ImageBase);
|
|
newebx = cli_readint32(dst + 16) - EC32(optional_hdr32.ImageBase);
|
|
newedx = cli_readint32(dst + 20);
|
|
|
|
if(newedi != exe_sections[i].rva) {
|
|
cli_dbgmsg("FSG: Bad destination buffer (edi is %x should be %x)\n", newedi, exe_sections[i].rva);
|
|
break;
|
|
}
|
|
|
|
if(newesi < exe_sections[i + 1].rva || newesi - exe_sections[i + 1].rva >= exe_sections[i + 1].rsz) {
|
|
cli_dbgmsg("FSG: Source buffer out of section bounds\n");
|
|
break;
|
|
}
|
|
|
|
if(!CLI_ISCONTAINED(exe_sections[i + 1].rva, exe_sections[i + 1].rsz, newebx, 16)) {
|
|
cli_dbgmsg("FSG: Array of functions out of bounds\n");
|
|
break;
|
|
}
|
|
|
|
newedx=cli_readint32(newebx + 12 - exe_sections[i + 1].rva + src) - EC32(optional_hdr32.ImageBase);
|
|
cli_dbgmsg("FSG: found old EP @%x\n",newedx);
|
|
|
|
if((dest = (char *) cli_calloc(dsize, sizeof(char))) == NULL) {
|
|
free(exe_sections);
|
|
return CL_EMEM;
|
|
}
|
|
|
|
#if HAVE_JSON
|
|
if (pe_json != NULL)
|
|
cli_jsonstr(pe_json, "Packer", "FSG");
|
|
#endif
|
|
|
|
CLI_UNPTEMP("FSG",(dest,exe_sections,0));
|
|
CLI_UNPRESULTSFSG2("FSG",(unfsg_200(newesi - exe_sections[i + 1].rva + src, dest, ssize + exe_sections[i + 1].rva - newesi, dsize, newedi, EC32(optional_hdr32.ImageBase), newedx, ndesc)),1,(dest,0));
|
|
break;
|
|
}
|
|
|
|
|
|
while(found && (DCONF & PE_CONF_FSG) && epbuff[0] == '\xbe' && cli_readint32(epbuff + 1) - EC32(optional_hdr32.ImageBase) < min) {
|
|
int sectcnt = 0;
|
|
const char *support;
|
|
uint32_t newesi, newedi, oldep, gp, t;
|
|
struct cli_exe_section *sections;
|
|
|
|
/* FSG support - v. 1.33 (thx trog for the many samples) */
|
|
|
|
ssize = exe_sections[i + 1].rsz;
|
|
dsize = exe_sections[i].vsz;
|
|
|
|
CLI_UNPSIZELIMITS("FSG", MAX(dsize, ssize));
|
|
|
|
if(ssize <= 0x19 || dsize <= ssize) {
|
|
cli_dbgmsg("FSG: Size mismatch (ssize: %d, dsize: %d)\n", ssize, dsize);
|
|
free(exe_sections);
|
|
return CL_CLEAN;
|
|
}
|
|
|
|
if(!(t = cli_rawaddr(cli_readint32(epbuff + 1) - EC32(optional_hdr32.ImageBase), NULL, 0 , &err, fsize, hdr_size)) && err ) {
|
|
cli_dbgmsg("FSG: Support data out of padding area\n");
|
|
break;
|
|
}
|
|
|
|
gp = exe_sections[i + 1].raw - t;
|
|
|
|
CLI_UNPSIZELIMITS("FSG", gp);
|
|
|
|
if(!(support = fmap_need_off_once(map, t, gp))) {
|
|
cli_dbgmsg("Can't read %d bytes from padding area\n", gp);
|
|
free(exe_sections);
|
|
return CL_EREAD;
|
|
}
|
|
|
|
/* newebx = cli_readint32(support) - EC32(optional_hdr32.ImageBase); Unused */
|
|
newedi = cli_readint32(support + 4) - EC32(optional_hdr32.ImageBase); /* 1st dest */
|
|
newesi = cli_readint32(support + 8) - EC32(optional_hdr32.ImageBase); /* Source */
|
|
|
|
if(newesi < exe_sections[i + 1].rva || newesi - exe_sections[i + 1].rva >= exe_sections[i + 1].rsz) {
|
|
cli_dbgmsg("FSG: Source buffer out of section bounds\n");
|
|
break;
|
|
}
|
|
|
|
if(newedi != exe_sections[i].rva) {
|
|
cli_dbgmsg("FSG: Bad destination (is %x should be %x)\n", newedi, exe_sections[i].rva);
|
|
break;
|
|
}
|
|
|
|
/* Counting original sections */
|
|
for(t = 12; t < gp - 4; t += 4) {
|
|
uint32_t rva = cli_readint32(support+t);
|
|
|
|
if(!rva)
|
|
break;
|
|
|
|
rva -= EC32(optional_hdr32.ImageBase)+1;
|
|
sectcnt++;
|
|
|
|
if(rva % 0x1000)
|
|
cli_dbgmsg("FSG: Original section %d is misaligned\n", sectcnt);
|
|
|
|
if(rva < exe_sections[i].rva || rva - exe_sections[i].rva >= exe_sections[i].vsz) {
|
|
cli_dbgmsg("FSG: Original section %d is out of bounds\n", sectcnt);
|
|
break;
|
|
}
|
|
}
|
|
|
|
if(t >= gp - 4 || cli_readint32(support + t)) {
|
|
break;
|
|
}
|
|
|
|
if((sections = (struct cli_exe_section *) cli_malloc((sectcnt + 1) * sizeof(struct cli_exe_section))) == NULL) {
|
|
cli_errmsg("FSG: Unable to allocate memory for sections %llu\n", (long long unsigned)((sectcnt + 1) * sizeof(struct cli_exe_section)));
|
|
free(exe_sections);
|
|
return CL_EMEM;
|
|
}
|
|
|
|
sections[0].rva = newedi;
|
|
for(t = 1; t <= (uint32_t)sectcnt; t++)
|
|
sections[t].rva = cli_readint32(support + 8 + t * 4) - 1 - EC32(optional_hdr32.ImageBase);
|
|
|
|
if(!exe_sections[i + 1].rsz || !(src = fmap_need_off_once(map, exe_sections[i + 1].raw, ssize))) {
|
|
cli_dbgmsg("Can't read raw data of section %d\n", i);
|
|
free(exe_sections);
|
|
free(sections);
|
|
return CL_EREAD;
|
|
}
|
|
|
|
if((dest = (char *) cli_calloc(dsize, sizeof(char))) == NULL) {
|
|
free(exe_sections);
|
|
free(sections);
|
|
return CL_EMEM;
|
|
}
|
|
|
|
oldep = vep + 161 + 6 + cli_readint32(epbuff+163);
|
|
cli_dbgmsg("FSG: found old EP @%x\n", oldep);
|
|
|
|
#if HAVE_JSON
|
|
if (pe_json != NULL)
|
|
cli_jsonstr(pe_json, "Packer", "FSG");
|
|
#endif
|
|
|
|
CLI_UNPTEMP("FSG",(dest,sections,exe_sections,0));
|
|
CLI_UNPRESULTSFSG1("FSG",(unfsg_133(src + newesi - exe_sections[i + 1].rva, dest, ssize + exe_sections[i + 1].rva - newesi, dsize, sections, sectcnt, EC32(optional_hdr32.ImageBase), oldep, ndesc)),1,(dest,sections,0));
|
|
break; /* were done with 1.33 */
|
|
}
|
|
|
|
while(found && (DCONF & PE_CONF_FSG) && epbuff[0] == '\xbb' && cli_readint32(epbuff + 1) - EC32(optional_hdr32.ImageBase) < min && epbuff[5] == '\xbf' && epbuff[10] == '\xbe' && vep >= exe_sections[i + 1].rva && vep - exe_sections[i + 1].rva > exe_sections[i + 1].rva - 0xe0 ) {
|
|
int sectcnt = 0;
|
|
uint32_t gp, t = cli_rawaddr(cli_readint32(epbuff+1) - EC32(optional_hdr32.ImageBase), NULL, 0 , &err, fsize, hdr_size);
|
|
const char *support;
|
|
uint32_t newesi = cli_readint32(epbuff+11) - EC32(optional_hdr32.ImageBase);
|
|
uint32_t newedi = cli_readint32(epbuff+6) - EC32(optional_hdr32.ImageBase);
|
|
uint32_t oldep = vep - exe_sections[i + 1].rva;
|
|
struct cli_exe_section *sections;
|
|
|
|
/* FSG support - v. 1.31 */
|
|
|
|
ssize = exe_sections[i + 1].rsz;
|
|
dsize = exe_sections[i].vsz;
|
|
|
|
if(err) {
|
|
cli_dbgmsg("FSG: Support data out of padding area\n");
|
|
break;
|
|
}
|
|
|
|
if(newesi < exe_sections[i + 1].rva || newesi - exe_sections[i + 1].rva >= exe_sections[i + 1].raw) {
|
|
cli_dbgmsg("FSG: Source buffer out of section bounds\n");
|
|
break;
|
|
}
|
|
|
|
if(newedi != exe_sections[i].rva) {
|
|
cli_dbgmsg("FSG: Bad destination (is %x should be %x)\n", newedi, exe_sections[i].rva);
|
|
break;
|
|
}
|
|
|
|
CLI_UNPSIZELIMITS("FSG", MAX(dsize, ssize));
|
|
|
|
if(ssize <= 0x19 || dsize <= ssize) {
|
|
cli_dbgmsg("FSG: Size mismatch (ssize: %d, dsize: %d)\n", ssize, dsize);
|
|
free(exe_sections);
|
|
return CL_CLEAN;
|
|
}
|
|
|
|
gp = exe_sections[i + 1].raw - t;
|
|
|
|
CLI_UNPSIZELIMITS("FSG", gp)
|
|
|
|
if(!(support = fmap_need_off_once(map, t, gp))) {
|
|
cli_dbgmsg("Can't read %d bytes from padding area\n", gp);
|
|
free(exe_sections);
|
|
return CL_EREAD;
|
|
}
|
|
|
|
/* Counting original sections */
|
|
for(t = 0; t < gp - 2; t += 2) {
|
|
uint32_t rva = support[t]|(support[t+1]<<8);
|
|
|
|
if (rva == 2 || rva == 1)
|
|
break;
|
|
|
|
rva = ((rva-2)<<12) - EC32(optional_hdr32.ImageBase);
|
|
sectcnt++;
|
|
|
|
if(rva < exe_sections[i].rva || rva - exe_sections[i].rva >= exe_sections[i].vsz) {
|
|
cli_dbgmsg("FSG: Original section %d is out of bounds\n", sectcnt);
|
|
break;
|
|
}
|
|
}
|
|
|
|
if(t >= gp-10 || cli_readint32(support + t + 6) != 2)
|
|
break;
|
|
|
|
if((sections = (struct cli_exe_section *) cli_malloc((sectcnt + 1) * sizeof(struct cli_exe_section))) == NULL) {
|
|
cli_errmsg("FSG: Unable to allocate memory for sections %llu\n", (long long unsigned)((sectcnt + 1) * sizeof(struct cli_exe_section)));
|
|
free(exe_sections);
|
|
return CL_EMEM;
|
|
}
|
|
|
|
sections[0].rva = newedi;
|
|
for(t = 0; t <= (uint32_t)sectcnt - 1; t++)
|
|
sections[t+1].rva = (((support[t*2]|(support[t*2+1]<<8))-2)<<12)-EC32(optional_hdr32.ImageBase);
|
|
|
|
if(!exe_sections[i + 1].rsz || !(src = fmap_need_off_once(map, exe_sections[i + 1].raw, ssize))) {
|
|
cli_dbgmsg("FSG: Can't read raw data of section %d\n", i);
|
|
free(exe_sections);
|
|
free(sections);
|
|
return CL_EREAD;
|
|
}
|
|
|
|
if((dest = (char *) cli_calloc(dsize, sizeof(char))) == NULL) {
|
|
free(exe_sections);
|
|
free(sections);
|
|
return CL_EMEM;
|
|
}
|
|
|
|
gp = 0xda + 6*(epbuff[16]=='\xe8');
|
|
oldep = vep + gp + 6 + cli_readint32(src+gp+2+oldep);
|
|
cli_dbgmsg("FSG: found old EP @%x\n", oldep);
|
|
|
|
#if HAVE_JSON
|
|
if (pe_json != NULL)
|
|
cli_jsonstr(pe_json, "Packer", "FSG");
|
|
#endif
|
|
|
|
CLI_UNPTEMP("FSG",(dest,sections,exe_sections,0));
|
|
CLI_UNPRESULTSFSG1("FSG",(unfsg_133(src + newesi - exe_sections[i + 1].rva, dest, ssize + exe_sections[i + 1].rva - newesi, dsize, sections, sectcnt, EC32(optional_hdr32.ImageBase), oldep, ndesc)),1,(dest,sections,0));
|
|
|
|
break; /* were done with 1.31 */
|
|
}
|
|
|
|
|
|
if(found && (DCONF & PE_CONF_UPX)) {
|
|
ssize = exe_sections[i + 1].rsz;
|
|
dsize = exe_sections[i].vsz + exe_sections[i + 1].vsz;
|
|
|
|
/*
|
|
* UPX support
|
|
* we assume (i + 1) is UPX1
|
|
*/
|
|
|
|
/* cli_dbgmsg("UPX: ssize %u dsize %u\n", ssize, dsize); */
|
|
|
|
CLI_UNPSIZELIMITS("UPX", MAX(dsize, ssize));
|
|
|
|
if(ssize <= 0x19 || dsize <= ssize || dsize > CLI_MAX_ALLOCATION ) {
|
|
cli_dbgmsg("UPX: Size mismatch or dsize too big (ssize: %d, dsize: %d)\n", ssize, dsize);
|
|
free(exe_sections);
|
|
return CL_CLEAN;
|
|
}
|
|
|
|
if(!exe_sections[i + 1].rsz || !(src = fmap_need_off_once(map, exe_sections[i + 1].raw, ssize))) {
|
|
cli_dbgmsg("UPX: Can't read raw data of section %d\n", i+1);
|
|
free(exe_sections);
|
|
return CL_EREAD;
|
|
}
|
|
|
|
if((dest = (char *) cli_calloc(dsize + 8192, sizeof(char))) == NULL) {
|
|
free(exe_sections);
|
|
return CL_EMEM;
|
|
}
|
|
|
|
/* try to detect UPX code */
|
|
if(cli_memstr(UPX_NRV2B, 24, epbuff + 0x69, 13) || cli_memstr(UPX_NRV2B, 24, epbuff + 0x69 + 8, 13)) {
|
|
cli_dbgmsg("UPX: Looks like a NRV2B decompression routine\n");
|
|
upxfn = upx_inflate2b;
|
|
} else if(cli_memstr(UPX_NRV2D, 24, epbuff + 0x69, 13) || cli_memstr(UPX_NRV2D, 24, epbuff + 0x69 + 8, 13)) {
|
|
cli_dbgmsg("UPX: Looks like a NRV2D decompression routine\n");
|
|
upxfn = upx_inflate2d;
|
|
} else if(cli_memstr(UPX_NRV2E, 24, epbuff + 0x69, 13) || cli_memstr(UPX_NRV2E, 24, epbuff + 0x69 + 8, 13)) {
|
|
cli_dbgmsg("UPX: Looks like a NRV2E decompression routine\n");
|
|
upxfn = upx_inflate2e;
|
|
}
|
|
|
|
if(upxfn) {
|
|
int skew = cli_readint32(epbuff + 2) - EC32(optional_hdr32.ImageBase) - exe_sections[i + 1].rva;
|
|
|
|
if(epbuff[1] != '\xbe' || skew <= 0 || skew > 0xfff) {
|
|
/* FIXME: legit skews?? */
|
|
skew = 0;
|
|
} else if ((unsigned int)skew > ssize) {
|
|
/* Ignore suggested skew larger than section size */
|
|
skew = 0;
|
|
} else {
|
|
cli_dbgmsg("UPX: UPX1 seems skewed by %d bytes\n", skew);
|
|
}
|
|
|
|
/* Try skewed first (skew may be zero) */
|
|
if(upxfn(src + skew, ssize - skew, dest, &dsize, exe_sections[i].rva, exe_sections[i + 1].rva, vep-skew) >= 0) {
|
|
upx_success = 1;
|
|
}
|
|
/* If skew not successful and non-zero, try no skew */
|
|
else if(skew && (upxfn(src, ssize, dest, &dsize, exe_sections[i].rva, exe_sections[i + 1].rva, vep) >= 0)) {
|
|
upx_success = 1;
|
|
}
|
|
|
|
if(upx_success)
|
|
cli_dbgmsg("UPX: Successfully decompressed\n");
|
|
else
|
|
cli_dbgmsg("UPX: Preferred decompressor failed\n");
|
|
}
|
|
|
|
if(!upx_success && upxfn != upx_inflate2b) {
|
|
if(upx_inflate2b(src, ssize, dest, &dsize, exe_sections[i].rva, exe_sections[i + 1].rva, vep) == -1 && upx_inflate2b(src + 0x15, ssize - 0x15, dest, &dsize, exe_sections[i].rva, exe_sections[i + 1].rva, vep - 0x15) == -1) {
|
|
|
|
cli_dbgmsg("UPX: NRV2B decompressor failed\n");
|
|
} else {
|
|
upx_success = 1;
|
|
cli_dbgmsg("UPX: Successfully decompressed with NRV2B\n");
|
|
}
|
|
}
|
|
|
|
if(!upx_success && upxfn != upx_inflate2d) {
|
|
if(upx_inflate2d(src, ssize, dest, &dsize, exe_sections[i].rva, exe_sections[i + 1].rva, vep) == -1 && upx_inflate2d(src + 0x15, ssize - 0x15, dest, &dsize, exe_sections[i].rva, exe_sections[i + 1].rva, vep - 0x15) == -1) {
|
|
|
|
cli_dbgmsg("UPX: NRV2D decompressor failed\n");
|
|
} else {
|
|
upx_success = 1;
|
|
cli_dbgmsg("UPX: Successfully decompressed with NRV2D\n");
|
|
}
|
|
}
|
|
|
|
if(!upx_success && upxfn != upx_inflate2e) {
|
|
if(upx_inflate2e(src, ssize, dest, &dsize, exe_sections[i].rva, exe_sections[i + 1].rva, vep) == -1 && upx_inflate2e(src + 0x15, ssize - 0x15, dest, &dsize, exe_sections[i].rva, exe_sections[i + 1].rva, vep - 0x15) == -1) {
|
|
cli_dbgmsg("UPX: NRV2E decompressor failed\n");
|
|
} else {
|
|
upx_success = 1;
|
|
cli_dbgmsg("UPX: Successfully decompressed with NRV2E\n");
|
|
}
|
|
}
|
|
|
|
if(cli_memstr(UPX_LZMA2, 20, epbuff + 0x2f, 20)) {
|
|
uint32_t strictdsize=cli_readint32(epbuff+0x21), skew = 0;
|
|
if(ssize > 0x15 && epbuff[0] == '\x60' && epbuff[1] == '\xbe') {
|
|
skew = cli_readint32(epbuff+2) - exe_sections[i + 1].rva - optional_hdr32.ImageBase;
|
|
if(skew!=0x15)
|
|
skew = 0;
|
|
}
|
|
|
|
if(strictdsize<=dsize)
|
|
upx_success = upx_inflatelzma(src+skew, ssize-skew, dest, &strictdsize, exe_sections[i].rva, exe_sections[i + 1].rva, vep) >=0;
|
|
} else if (cli_memstr(UPX_LZMA1, 20, epbuff + 0x39, 20)) {
|
|
uint32_t strictdsize=cli_readint32(epbuff+0x2b), skew = 0;
|
|
if(ssize > 0x15 && epbuff[0] == '\x60' && epbuff[1] == '\xbe') {
|
|
skew = cli_readint32(epbuff+2) - exe_sections[i + 1].rva - optional_hdr32.ImageBase;
|
|
if(skew!=0x15)
|
|
skew = 0;
|
|
}
|
|
|
|
if(strictdsize<=dsize)
|
|
upx_success = upx_inflatelzma(src+skew, ssize-skew, dest, &strictdsize, exe_sections[i].rva, exe_sections[i + 1].rva, vep) >=0;
|
|
}
|
|
|
|
if(!upx_success) {
|
|
cli_dbgmsg("UPX: All decompressors failed\n");
|
|
free(dest);
|
|
}
|
|
}
|
|
|
|
if(upx_success) {
|
|
free(exe_sections);
|
|
|
|
CLI_UNPTEMP("UPX/FSG",(dest,0));
|
|
#if HAVE_JSON
|
|
if (pe_json != NULL)
|
|
cli_jsonstr(pe_json, "Packer", "UPX");
|
|
#endif
|
|
|
|
if((unsigned int) write(ndesc, dest, dsize) != dsize) {
|
|
cli_dbgmsg("UPX/FSG: Can't write %d bytes\n", dsize);
|
|
free(tempfile);
|
|
free(dest);
|
|
close(ndesc);
|
|
return CL_EWRITE;
|
|
}
|
|
|
|
free(dest);
|
|
if (lseek(ndesc, 0, SEEK_SET) == -1) {
|
|
cli_dbgmsg("UPX/FSG: lseek() failed\n");
|
|
close(ndesc);
|
|
CLI_TMPUNLK();
|
|
free(tempfile);
|
|
SHA_RESET;
|
|
return CL_ESEEK;
|
|
}
|
|
|
|
if(ctx->engine->keeptmp)
|
|
cli_dbgmsg("UPX/FSG: Decompressed data saved in %s\n", tempfile);
|
|
|
|
cli_dbgmsg("***** Scanning decompressed file *****\n");
|
|
SHA_OFF;
|
|
if((ret = cli_magic_scandesc(ndesc, ctx)) == CL_VIRUS) {
|
|
close(ndesc);
|
|
CLI_TMPUNLK();
|
|
free(tempfile);
|
|
SHA_RESET;
|
|
return CL_VIRUS;
|
|
}
|
|
|
|
SHA_RESET;
|
|
close(ndesc);
|
|
CLI_TMPUNLK();
|
|
free(tempfile);
|
|
return ret;
|
|
}
|
|
|
|
|
|
/* Petite */
|
|
|
|
if(epsize<200) {
|
|
free(exe_sections);
|
|
return CL_CLEAN;
|
|
}
|
|
|
|
found = 2;
|
|
|
|
if(epbuff[0] != '\xb8' || (uint32_t) cli_readint32(epbuff + 1) != exe_sections[nsections - 1].rva + EC32(optional_hdr32.ImageBase)) {
|
|
if(nsections < 2 || epbuff[0] != '\xb8' || (uint32_t) cli_readint32(epbuff + 1) != exe_sections[nsections - 2].rva + EC32(optional_hdr32.ImageBase))
|
|
found = 0;
|
|
else
|
|
found = 1;
|
|
}
|
|
|
|
if(found && (DCONF & PE_CONF_PETITE)) {
|
|
cli_dbgmsg("Petite: v2.%d compression detected\n", found);
|
|
|
|
if(cli_readint32(epbuff + 0x80) == 0x163c988d) {
|
|
cli_dbgmsg("Petite: level zero compression is not supported yet\n");
|
|
} else {
|
|
dsize = max - min;
|
|
|
|
CLI_UNPSIZELIMITS("Petite", dsize);
|
|
|
|
if((dest = (char *) cli_calloc(dsize, sizeof(char))) == NULL) {
|
|
cli_dbgmsg("Petite: Can't allocate %d bytes\n", dsize);
|
|
free(exe_sections);
|
|
return CL_EMEM;
|
|
}
|
|
|
|
for(i = 0 ; i < nsections; i++) {
|
|
if(exe_sections[i].raw) {
|
|
unsigned int r_ret;
|
|
|
|
if (!exe_sections[i].rsz)
|
|
goto out_no_petite;
|
|
|
|
if (!CLI_ISCONTAINED(dest, dsize,
|
|
dest + exe_sections[i].rva - min,
|
|
exe_sections[i].ursz))
|
|
goto out_no_petite;
|
|
|
|
r_ret = fmap_readn(map, dest + exe_sections[i].rva - min,
|
|
exe_sections[i].raw,
|
|
exe_sections[i].ursz);
|
|
if (r_ret != exe_sections[i].ursz) {
|
|
out_no_petite:
|
|
free(exe_sections);
|
|
free(dest);
|
|
return CL_CLEAN;
|
|
}
|
|
}
|
|
}
|
|
|
|
#if HAVE_JSON
|
|
if (pe_json != NULL)
|
|
cli_jsonstr(pe_json, "Packer", "Petite");
|
|
#endif
|
|
|
|
CLI_UNPTEMP("Petite",(dest,exe_sections,0));
|
|
CLI_UNPRESULTS("Petite",(petite_inflate2x_1to9(dest, min, max - min, exe_sections, nsections - (found == 1 ? 1 : 0), EC32(optional_hdr32.ImageBase),vep, ndesc, found, EC32(optional_hdr32.DataDirectory[2].VirtualAddress),EC32(optional_hdr32.DataDirectory[2].Size))),0,(dest,0));
|
|
}
|
|
}
|
|
|
|
/* PESpin 1.1 */
|
|
|
|
if((DCONF & PE_CONF_PESPIN) && nsections > 1 &&
|
|
vep >= exe_sections[nsections - 1].rva &&
|
|
0x3217 - 4 <= exe_sections[nsections - 1].rva + exe_sections[nsections - 1].rsz &&
|
|
vep < exe_sections[nsections - 1].rva + exe_sections[nsections - 1].rsz - 0x3217 - 4 &&
|
|
memcmp(epbuff+4, "\xe8\x00\x00\x00\x00\x8b\x1c\x24\x83\xc3", 10) == 0) {
|
|
|
|
char *spinned;
|
|
|
|
CLI_UNPSIZELIMITS("PEspin", fsize);
|
|
|
|
if((spinned = (char *) cli_malloc(fsize)) == NULL) {
|
|
cli_errmsg("PESping: Unable to allocate memory for spinned %lu\n", (unsigned long)fsize);
|
|
free(exe_sections);
|
|
return CL_EMEM;
|
|
}
|
|
|
|
if((size_t) fmap_readn(map, spinned, 0, fsize) != fsize) {
|
|
cli_dbgmsg("PESpin: Can't read %lu bytes\n", (unsigned long)fsize);
|
|
free(spinned);
|
|
free(exe_sections);
|
|
return CL_EREAD;
|
|
}
|
|
|
|
#if HAVE_JSON
|
|
if (pe_json != NULL)
|
|
cli_jsonstr(pe_json, "Packer", "PEspin");
|
|
#endif
|
|
|
|
CLI_UNPTEMP("PESpin",(spinned,exe_sections,0));
|
|
CLI_UNPRESULTS_("PEspin",SPINCASE(),(unspin(spinned, fsize, exe_sections, nsections - 1, vep, ndesc, ctx)),0,(spinned,0));
|
|
}
|
|
|
|
|
|
/* yC 1.3 & variants */
|
|
if((DCONF & PE_CONF_YC) && nsections > 1 &&
|
|
(EC32(optional_hdr32.AddressOfEntryPoint) == exe_sections[nsections - 1].rva + 0x60)) {
|
|
|
|
uint32_t ecx = 0;
|
|
int16_t offset;
|
|
|
|
/* yC 1.3 */
|
|
if (!memcmp(epbuff, "\x55\x8B\xEC\x53\x56\x57\x60\xE8\x00\x00\x00\x00\x5D\x81\xED", 15) &&
|
|
!memcmp(epbuff+0x26, "\x8D\x3A\x8B\xF7\x33\xC0\xEB\x04\x90\xEB\x01\xC2\xAC", 13) &&
|
|
((uint8_t)epbuff[0x13] == 0xB9) &&
|
|
((uint16_t)(cli_readint16(epbuff+0x18)) == 0xE981) &&
|
|
!memcmp(epbuff+0x1e,"\x8B\xD5\x81\xC2", 4)) {
|
|
|
|
offset = 0;
|
|
if (0x6c - cli_readint32(epbuff+0xf) + cli_readint32(epbuff+0x22) == 0xC6)
|
|
ecx = cli_readint32(epbuff+0x14) - cli_readint32(epbuff+0x1a);
|
|
}
|
|
|
|
/* yC 1.3 variant */
|
|
if (!ecx && !memcmp(epbuff, "\x55\x8B\xEC\x83\xEC\x40\x53\x56\x57", 9) &&
|
|
!memcmp(epbuff+0x17, "\xe8\x00\x00\x00\x00\x5d\x81\xed", 8) &&
|
|
((uint8_t)epbuff[0x23] == 0xB9)) {
|
|
|
|
offset = 0x10;
|
|
if (0x6c - cli_readint32(epbuff+0x1f) + cli_readint32(epbuff+0x32) == 0xC6)
|
|
ecx = cli_readint32(epbuff+0x24) - cli_readint32(epbuff+0x2a);
|
|
}
|
|
|
|
/* yC 1.x/modified */
|
|
if (!ecx && !memcmp(epbuff, "\x60\xe8\x00\x00\x00\x00\x5d\x81\xed",9) &&
|
|
((uint8_t)epbuff[0xd] == 0xb9) &&
|
|
((uint16_t)cli_readint16(epbuff + 0x12)== 0xbd8d) &&
|
|
!memcmp(epbuff+0x18, "\x8b\xf7\xac", 3)) {
|
|
|
|
offset = -0x18;
|
|
if (0x66 - cli_readint32(epbuff+0x9) + cli_readint32(epbuff+0x14) == 0xae)
|
|
ecx = cli_readint32(epbuff+0xe);
|
|
}
|
|
|
|
if (ecx > 0x800 && ecx < 0x2000 &&
|
|
!memcmp(epbuff+0x63+offset, "\xaa\xe2\xcc", 3) &&
|
|
(fsize >= exe_sections[nsections-1].raw + 0xC6 + ecx + offset)) {
|
|
|
|
char *spinned;
|
|
|
|
if((spinned = (char *) cli_malloc(fsize)) == NULL) {
|
|
cli_errmsg("yC: Unable to allocate memory for spinned %lu\n", (unsigned long)fsize);
|
|
free(exe_sections);
|
|
return CL_EMEM;
|
|
}
|
|
|
|
if((size_t) fmap_readn(map, spinned, 0, fsize) != fsize) {
|
|
cli_dbgmsg("yC: Can't read %lu bytes\n", (unsigned long)fsize);
|
|
free(spinned);
|
|
free(exe_sections);
|
|
return CL_EREAD;
|
|
}
|
|
|
|
#if HAVE_JSON
|
|
if (pe_json != NULL)
|
|
cli_jsonstr(pe_json, "Packer", "yC");
|
|
#endif
|
|
|
|
do {
|
|
unsigned int yc_unp_num_viruses = ctx->num_viruses;
|
|
const char *yc_unp_virname = NULL;
|
|
|
|
if (ctx->virname)
|
|
yc_unp_virname = ctx->virname[0];
|
|
|
|
cli_dbgmsg("%d,%d,%d,%d\n", nsections-1, e_lfanew, ecx, offset);
|
|
CLI_UNPTEMP("yC",(spinned,exe_sections,0));
|
|
CLI_UNPRESULTS("yC",(yc_decrypt(ctx, spinned, fsize, exe_sections, nsections-1, e_lfanew, ndesc, ecx, offset)),0,(spinned,0));
|
|
|
|
if (SCAN_ALL && yc_unp_num_viruses != ctx->num_viruses) {
|
|
free(exe_sections);
|
|
return CL_VIRUS;
|
|
}
|
|
else if (ctx->virname && yc_unp_virname != ctx->virname[0]) {
|
|
free(exe_sections);
|
|
return CL_VIRUS;
|
|
}
|
|
} while(0);
|
|
}
|
|
}
|
|
|
|
/* WWPack */
|
|
|
|
while ((DCONF & PE_CONF_WWPACK) && nsections > 1 &&
|
|
vep == exe_sections[nsections - 1].rva &&
|
|
memcmp(epbuff, "\x53\x55\x8b\xe8\x33\xdb\xeb", 7) == 0 &&
|
|
memcmp(epbuff+0x68, "\xe8\x00\x00\x00\x00\x58\x2d\x6d\x00\x00\x00\x50\x60\x33\xc9\x50\x58\x50\x50", 19) == 0) {
|
|
uint32_t head = exe_sections[nsections - 1].raw;
|
|
uint8_t *packer;
|
|
char *src;
|
|
|
|
ssize = 0;
|
|
for(i=0 ; ; i++) {
|
|
if(exe_sections[i].raw<head)
|
|
head=exe_sections[i].raw;
|
|
|
|
if(i+1==nsections)
|
|
break;
|
|
|
|
if(ssize<exe_sections[i].rva+exe_sections[i].vsz)
|
|
ssize=exe_sections[i].rva+exe_sections[i].vsz;
|
|
}
|
|
|
|
if(!head || !ssize || head>ssize)
|
|
break;
|
|
|
|
CLI_UNPSIZELIMITS("WWPack", ssize);
|
|
|
|
if(!(src=(char *)cli_calloc(ssize, sizeof(char)))) {
|
|
free(exe_sections);
|
|
return CL_EMEM;
|
|
}
|
|
|
|
if((size_t) fmap_readn(map, src, 0, head) != head) {
|
|
cli_dbgmsg("WWPack: Can't read %d bytes from headers\n", head);
|
|
free(src);
|
|
free(exe_sections);
|
|
return CL_EREAD;
|
|
}
|
|
|
|
for(i = 0 ; i < (unsigned int)nsections-1; i++) {
|
|
if(!exe_sections[i].rsz)
|
|
continue;
|
|
|
|
if(!CLI_ISCONTAINED(src, ssize, src+exe_sections[i].rva, exe_sections[i].rsz))
|
|
break;
|
|
|
|
if((unsigned int)fmap_readn(map, src+exe_sections[i].rva, exe_sections[i].raw, exe_sections[i].rsz)!=exe_sections[i].rsz)
|
|
break;
|
|
}
|
|
|
|
if(i+1!=nsections) {
|
|
cli_dbgmsg("WWpack: Probably hacked/damaged file.\n");
|
|
free(src);
|
|
break;
|
|
}
|
|
|
|
if((packer = (uint8_t *) cli_calloc(exe_sections[nsections - 1].rsz, sizeof(char))) == NULL) {
|
|
free(src);
|
|
free(exe_sections);
|
|
return CL_EMEM;
|
|
}
|
|
|
|
if(!exe_sections[nsections - 1].rsz || (size_t) fmap_readn(map, packer, exe_sections[nsections - 1].raw, exe_sections[nsections - 1].rsz) != exe_sections[nsections - 1].rsz) {
|
|
cli_dbgmsg("WWPack: Can't read %d bytes from wwpack sect\n", exe_sections[nsections - 1].rsz);
|
|
free(src);
|
|
free(packer);
|
|
free(exe_sections);
|
|
return CL_EREAD;
|
|
}
|
|
|
|
#if HAVE_JSON
|
|
if (pe_json != NULL)
|
|
cli_jsonstr(pe_json, "Packer", "WWPack");
|
|
#endif
|
|
|
|
CLI_UNPTEMP("WWPack",(src,packer,exe_sections,0));
|
|
CLI_UNPRESULTS("WWPack",(wwunpack((uint8_t *)src, ssize, packer, exe_sections, nsections-1, e_lfanew, ndesc)),0,(src,packer,0));
|
|
break;
|
|
}
|
|
|
|
|
|
/* ASPACK support */
|
|
while((DCONF & PE_CONF_ASPACK) && ep+58+0x70e < fsize && !memcmp(epbuff,"\x60\xe8\x03\x00\x00\x00\xe9\xeb",8)) {
|
|
char *src;
|
|
|
|
if(epsize<0x3bf || memcmp(epbuff+0x3b9, "\x68\x00\x00\x00\x00\xc3",6))
|
|
break;
|
|
ssize = 0;
|
|
for(i=0 ; i< nsections ; i++)
|
|
if(ssize<exe_sections[i].rva+exe_sections[i].vsz)
|
|
ssize=exe_sections[i].rva+exe_sections[i].vsz;
|
|
|
|
if(!ssize)
|
|
break;
|
|
|
|
CLI_UNPSIZELIMITS("Aspack", ssize);
|
|
|
|
if(!(src=(char *)cli_calloc(ssize, sizeof(char)))) {
|
|
free(exe_sections);
|
|
return CL_EMEM;
|
|
}
|
|
for(i = 0 ; i < (unsigned int)nsections; i++) {
|
|
if(!exe_sections[i].rsz)
|
|
continue;
|
|
|
|
if(!CLI_ISCONTAINED(src, ssize, src+exe_sections[i].rva, exe_sections[i].rsz))
|
|
break;
|
|
|
|
if((unsigned int)fmap_readn(map, src+exe_sections[i].rva, exe_sections[i].raw, exe_sections[i].rsz)!=exe_sections[i].rsz)
|
|
break;
|
|
}
|
|
|
|
if(i!=nsections) {
|
|
cli_dbgmsg("Aspack: Probably hacked/damaged Aspack file.\n");
|
|
free(src);
|
|
break;
|
|
}
|
|
|
|
#if HAVE_JSON
|
|
if (pe_json != NULL)
|
|
cli_jsonstr(pe_json, "Packer", "Aspack");
|
|
#endif
|
|
|
|
CLI_UNPTEMP("Aspack",(src,exe_sections,0));
|
|
CLI_UNPRESULTS("Aspack",(unaspack212((uint8_t *)src, ssize, exe_sections, nsections, vep-1, EC32(optional_hdr32.ImageBase), ndesc)),1,(src,0));
|
|
break;
|
|
}
|
|
|
|
/* NsPack */
|
|
|
|
while (DCONF & PE_CONF_NSPACK) {
|
|
uint32_t eprva = vep;
|
|
uint32_t start_of_stuff, rep = ep;
|
|
unsigned int nowinldr;
|
|
const char *nbuff;
|
|
|
|
src=epbuff;
|
|
if (*epbuff=='\xe9') { /* bitched headers */
|
|
eprva = cli_readint32(epbuff+1)+vep+5;
|
|
if (!(rep = cli_rawaddr(eprva, exe_sections, nsections, &err, fsize, hdr_size)) && err)
|
|
break;
|
|
|
|
if (!(nbuff = fmap_need_off_once(map, rep, 24)))
|
|
break;
|
|
|
|
src = nbuff;
|
|
}
|
|
|
|
if (memcmp(src, "\x9c\x60\xe8\x00\x00\x00\x00\x5d\xb8\x07\x00\x00\x00", 13))
|
|
break;
|
|
|
|
nowinldr = 0x54-cli_readint32(src+17);
|
|
cli_dbgmsg("NsPack: Found *start_of_stuff @delta-%x\n", nowinldr);
|
|
|
|
if(!(nbuff = fmap_need_off_once(map, rep-nowinldr, 4)))
|
|
break;
|
|
|
|
start_of_stuff=rep+cli_readint32(nbuff);
|
|
if(!(nbuff = fmap_need_off_once(map, start_of_stuff, 20)))
|
|
break;
|
|
|
|
src = nbuff;
|
|
if (!cli_readint32(nbuff)) {
|
|
start_of_stuff+=4; /* FIXME: more to do */
|
|
src+=4;
|
|
}
|
|
|
|
ssize = cli_readint32(src+5)|0xff;
|
|
dsize = cli_readint32(src+9);
|
|
|
|
CLI_UNPSIZELIMITS("NsPack", MAX(ssize,dsize));
|
|
|
|
if (!ssize || !dsize || dsize != exe_sections[0].vsz)
|
|
break;
|
|
|
|
if (!(dest=cli_malloc(dsize))) {
|
|
cli_errmsg("NsPack: Unable to allocate memory for dest %u\n", dsize);
|
|
break;
|
|
}
|
|
/* memset(dest, 0xfc, dsize); */
|
|
|
|
if(!(src = fmap_need_off(map, start_of_stuff, ssize))) {
|
|
free(dest);
|
|
break;
|
|
}
|
|
/* memset(src, 0x00, ssize); */
|
|
|
|
eprva+=0x27a;
|
|
if (!(rep = cli_rawaddr(eprva, exe_sections, nsections, &err, fsize, hdr_size)) && err) {
|
|
free(dest);
|
|
break;
|
|
}
|
|
|
|
if(!(nbuff = fmap_need_off_once(map, rep, 5))) {
|
|
free(dest);
|
|
break;
|
|
}
|
|
|
|
fmap_unneed_off(map, start_of_stuff, ssize);
|
|
eprva=eprva+5+cli_readint32(nbuff+1);
|
|
cli_dbgmsg("NsPack: OEP = %08x\n", eprva);
|
|
|
|
#if HAVE_JSON
|
|
if (pe_json != NULL)
|
|
cli_jsonstr(pe_json, "Packer", "NsPack");
|
|
#endif
|
|
|
|
CLI_UNPTEMP("NsPack",(dest,exe_sections,0));
|
|
CLI_UNPRESULTS("NsPack",(unspack(src, dest, ctx, exe_sections[0].rva, EC32(optional_hdr32.ImageBase), eprva, ndesc)),0,(dest,0));
|
|
break;
|
|
}
|
|
|
|
/* to be continued ... */
|
|
|
|
/* !!!!!!!!!!!!!! PACKERS END HERE !!!!!!!!!!!!!! */
|
|
ctx->corrupted_input = corrupted_cur;
|
|
|
|
/* Bytecode BC_PE_UNPACKER hook */
|
|
bc_ctx = cli_bytecode_context_alloc();
|
|
if (!bc_ctx) {
|
|
cli_errmsg("cli_scanpe: can't allocate memory for bc_ctx\n");
|
|
return CL_EMEM;
|
|
}
|
|
|
|
cli_bytecode_context_setpe(bc_ctx, &pedata, exe_sections);
|
|
cli_bytecode_context_setctx(bc_ctx, ctx);
|
|
|
|
ret = cli_bytecode_runhook(ctx, ctx->engine, bc_ctx, BC_PE_UNPACKER, map);
|
|
switch (ret) {
|
|
case CL_VIRUS:
|
|
free(exe_sections);
|
|
cli_bytecode_context_destroy(bc_ctx);
|
|
return CL_VIRUS;
|
|
case CL_SUCCESS:
|
|
ndesc = cli_bytecode_context_getresult_file(bc_ctx, &tempfile);
|
|
cli_bytecode_context_destroy(bc_ctx);
|
|
if (ndesc != -1 && tempfile) {
|
|
CLI_UNPRESULTS("bytecode PE hook", 1, 1, (0));
|
|
}
|
|
|
|
break;
|
|
default:
|
|
cli_bytecode_context_destroy(bc_ctx);
|
|
}
|
|
|
|
free(exe_sections);
|
|
|
|
#if HAVE_JSON
|
|
if (cli_json_timeout_cycle_check(ctx, &toval) != CL_SUCCESS)
|
|
return CL_ETIMEOUT;
|
|
#endif
|
|
|
|
if (SCAN_ALL && viruses_found)
|
|
return CL_VIRUS;
|
|
|
|
return CL_CLEAN;
|
|
}
|
|
|
|
int cli_peheader(fmap_t *map, struct cli_exe_info *peinfo)
|
|
{
|
|
uint16_t e_magic; /* DOS signature ("MZ") */
|
|
uint32_t e_lfanew; /* address of new exe header */
|
|
/* Obsolete - see below
|
|
uint32_t min = 0, max = 0;
|
|
*/
|
|
struct pe_image_file_hdr file_hdr;
|
|
union {
|
|
struct pe_image_optional_hdr64 opt64;
|
|
struct pe_image_optional_hdr32 opt32;
|
|
} pe_opt;
|
|
struct pe_image_section_hdr *section_hdr;
|
|
unsigned int i;
|
|
unsigned int err, pe_plus = 0;
|
|
uint32_t valign, falign, hdr_size;
|
|
size_t fsize;
|
|
ssize_t at;
|
|
struct pe_image_data_dir *dirs;
|
|
|
|
cli_dbgmsg("in cli_peheader\n");
|
|
|
|
fsize = map->len - peinfo->offset;
|
|
if(fmap_readn(map, &e_magic, peinfo->offset, sizeof(e_magic)) != sizeof(e_magic)) {
|
|
cli_dbgmsg("Can't read DOS signature\n");
|
|
return -1;
|
|
}
|
|
|
|
if(EC16(e_magic) != PE_IMAGE_DOS_SIGNATURE && EC16(e_magic) != PE_IMAGE_DOS_SIGNATURE_OLD) {
|
|
cli_dbgmsg("Invalid DOS signature\n");
|
|
return -1;
|
|
}
|
|
|
|
if(fmap_readn(map, &e_lfanew, peinfo->offset + 58 + sizeof(e_magic), sizeof(e_lfanew)) != sizeof(e_lfanew)) {
|
|
/* truncated header? */
|
|
return -1;
|
|
}
|
|
|
|
e_lfanew = EC32(e_lfanew);
|
|
if(!e_lfanew) {
|
|
cli_dbgmsg("Not a PE file\n");
|
|
return -1;
|
|
}
|
|
|
|
if(fmap_readn(map, &file_hdr, peinfo->offset + e_lfanew, sizeof(struct pe_image_file_hdr)) != sizeof(struct pe_image_file_hdr)) {
|
|
/* bad information in e_lfanew - probably not a PE file */
|
|
cli_dbgmsg("Can't read file header\n");
|
|
return -1;
|
|
}
|
|
|
|
if(EC32(file_hdr.Magic) != PE_IMAGE_NT_SIGNATURE) {
|
|
cli_dbgmsg("Invalid PE signature (probably NE file)\n");
|
|
return -1;
|
|
}
|
|
|
|
if ( (peinfo->nsections = EC16(file_hdr.NumberOfSections)) < 1 || peinfo->nsections > 96 ) return -1;
|
|
|
|
if (EC16(file_hdr.SizeOfOptionalHeader) < sizeof(struct pe_image_optional_hdr32)) {
|
|
cli_dbgmsg("SizeOfOptionalHeader too small\n");
|
|
return -1;
|
|
}
|
|
|
|
at = peinfo->offset + e_lfanew + sizeof(struct pe_image_file_hdr);
|
|
if(fmap_readn(map, &optional_hdr32, at, sizeof(struct pe_image_optional_hdr32)) != sizeof(struct pe_image_optional_hdr32)) {
|
|
cli_dbgmsg("Can't read optional file header\n");
|
|
return -1;
|
|
}
|
|
at += sizeof(struct pe_image_optional_hdr32);
|
|
|
|
if(EC16(optional_hdr64.Magic)==PE32P_SIGNATURE) { /* PE+ */
|
|
if(EC16(file_hdr.SizeOfOptionalHeader)!=sizeof(struct pe_image_optional_hdr64)) {
|
|
cli_dbgmsg("Incorrect SizeOfOptionalHeader for PE32+\n");
|
|
return -1;
|
|
}
|
|
|
|
if(fmap_readn(map, &optional_hdr32 + 1, at, sizeof(struct pe_image_optional_hdr64) - sizeof(struct pe_image_optional_hdr32)) != sizeof(struct pe_image_optional_hdr64) - sizeof(struct pe_image_optional_hdr32)) {
|
|
cli_dbgmsg("Can't read optional file header\n");
|
|
return -1;
|
|
}
|
|
|
|
at += sizeof(struct pe_image_optional_hdr64) - sizeof(struct pe_image_optional_hdr32);
|
|
hdr_size = EC32(optional_hdr64.SizeOfHeaders);
|
|
pe_plus=1;
|
|
} else { /* PE */
|
|
if (EC16(file_hdr.SizeOfOptionalHeader)!=sizeof(struct pe_image_optional_hdr32)) {
|
|
/* Seek to the end of the long header */
|
|
at += EC16(file_hdr.SizeOfOptionalHeader)-sizeof(struct pe_image_optional_hdr32);
|
|
}
|
|
|
|
hdr_size = EC32(optional_hdr32.SizeOfHeaders);
|
|
}
|
|
|
|
valign = (pe_plus)?EC32(optional_hdr64.SectionAlignment):EC32(optional_hdr32.SectionAlignment);
|
|
falign = (pe_plus)?EC32(optional_hdr64.FileAlignment):EC32(optional_hdr32.FileAlignment);
|
|
|
|
peinfo->hdr_size = hdr_size = PESALIGN(hdr_size, valign);
|
|
|
|
peinfo->section = (struct cli_exe_section *) cli_calloc(peinfo->nsections, sizeof(struct cli_exe_section));
|
|
|
|
if(!peinfo->section) {
|
|
cli_dbgmsg("Can't allocate memory for section headers\n");
|
|
return -1;
|
|
}
|
|
|
|
section_hdr = (struct pe_image_section_hdr *) cli_calloc(peinfo->nsections, sizeof(struct pe_image_section_hdr));
|
|
|
|
if(!section_hdr) {
|
|
cli_dbgmsg("Can't allocate memory for section headers\n");
|
|
free(peinfo->section);
|
|
peinfo->section = NULL;
|
|
return -1;
|
|
}
|
|
|
|
if(fmap_readn(map, section_hdr, at, peinfo->nsections * sizeof(struct pe_image_section_hdr)) != peinfo->nsections * sizeof(struct pe_image_section_hdr)) {
|
|
cli_dbgmsg("Can't read section header\n");
|
|
cli_dbgmsg("Possibly broken PE file\n");
|
|
free(section_hdr);
|
|
free(peinfo->section);
|
|
peinfo->section = NULL;
|
|
return -1;
|
|
}
|
|
at += sizeof(struct pe_image_section_hdr)*peinfo->nsections;
|
|
|
|
for(i = 0; falign!=0x200 && i<peinfo->nsections; i++) {
|
|
/* file alignment fallback mode - blah */
|
|
if (falign && section_hdr[i].SizeOfRawData && EC32(section_hdr[i].PointerToRawData)%falign && !(EC32(section_hdr[i].PointerToRawData)%0x200)) {
|
|
falign = 0x200;
|
|
}
|
|
}
|
|
|
|
for(i = 0; i < peinfo->nsections; i++) {
|
|
peinfo->section[i].rva = PEALIGN(EC32(section_hdr[i].VirtualAddress), valign);
|
|
peinfo->section[i].vsz = PESALIGN(EC32(section_hdr[i].VirtualSize), valign);
|
|
peinfo->section[i].raw = PEALIGN(EC32(section_hdr[i].PointerToRawData), falign);
|
|
peinfo->section[i].rsz = PESALIGN(EC32(section_hdr[i].SizeOfRawData), falign);
|
|
|
|
if (!peinfo->section[i].vsz && peinfo->section[i].rsz)
|
|
peinfo->section[i].vsz=PESALIGN(EC32(section_hdr[i].SizeOfRawData), valign);
|
|
|
|
if (peinfo->section[i].rsz && !CLI_ISCONTAINED(0, (uint32_t) fsize, peinfo->section[i].raw, peinfo->section[i].rsz))
|
|
peinfo->section[i].rsz = (fsize - peinfo->section[i].raw)*(fsize>peinfo->section[i].raw);
|
|
}
|
|
|
|
if(pe_plus) {
|
|
peinfo->ep = EC32(optional_hdr64.AddressOfEntryPoint);
|
|
dirs = optional_hdr64.DataDirectory;
|
|
} else {
|
|
peinfo->ep = EC32(optional_hdr32.AddressOfEntryPoint);
|
|
dirs = optional_hdr32.DataDirectory;
|
|
}
|
|
|
|
if(!(peinfo->ep = cli_rawaddr(peinfo->ep, peinfo->section, peinfo->nsections, &err, fsize, hdr_size)) && err) {
|
|
cli_dbgmsg("Broken PE file\n");
|
|
free(section_hdr);
|
|
free(peinfo->section);
|
|
peinfo->section = NULL;
|
|
return -1;
|
|
}
|
|
|
|
if(EC16(file_hdr.Characteristics) & 0x2000 || !dirs[2].Size)
|
|
peinfo->res_addr = 0;
|
|
else
|
|
peinfo->res_addr = EC32(dirs[2].VirtualAddress);
|
|
|
|
while(dirs[2].Size) {
|
|
struct vinfo_list vlist;
|
|
const uint8_t *vptr, *baseptr;
|
|
uint32_t rva, res_sz;
|
|
|
|
memset(&vlist, 0, sizeof(vlist));
|
|
findres(0x10, 0xffffffff, EC32(dirs[2].VirtualAddress), map, peinfo->section, peinfo->nsections, hdr_size, versioninfo_cb, &vlist);
|
|
if(!vlist.count)
|
|
break; /* No version_information */
|
|
|
|
if(cli_hashset_init(&peinfo->vinfo, 32, 80)) {
|
|
cli_errmsg("cli_peheader: Unable to init vinfo hashset\n");
|
|
free(section_hdr);
|
|
free(peinfo->section);
|
|
peinfo->section = NULL;
|
|
return -1;
|
|
}
|
|
|
|
err = 0;
|
|
for(i=0; i<vlist.count; i++) { /* enum all version_information res - RESUMABLE */
|
|
cli_dbgmsg("cli_peheader: parsing version info @ rva %x (%u/%u)\n", vlist.rvas[i], i+1, vlist.count);
|
|
rva = cli_rawaddr(vlist.rvas[i], peinfo->section, peinfo->nsections, &err, fsize, hdr_size);
|
|
if(err)
|
|
continue;
|
|
|
|
if(!(vptr = fmap_need_off_once(map, rva, 16)))
|
|
continue;
|
|
|
|
baseptr = vptr - rva;
|
|
/* parse resource */
|
|
rva = cli_readint32(vptr); /* ptr to version_info */
|
|
res_sz = cli_readint32(vptr+4); /* sizeof(resource) */
|
|
rva = cli_rawaddr(rva, peinfo->section, peinfo->nsections, &err, fsize, hdr_size);
|
|
if(err)
|
|
continue;
|
|
if(!(vptr = fmap_need_off_once(map, rva, res_sz)))
|
|
continue;
|
|
|
|
while(res_sz>4) { /* look for version_info - NOT RESUMABLE (expecting exactly one versioninfo) */
|
|
uint32_t vinfo_sz, vinfo_val_sz, got_varfileinfo = 0;
|
|
|
|
vinfo_sz = vinfo_val_sz = cli_readint32(vptr);
|
|
vinfo_sz &= 0xffff;
|
|
if(vinfo_sz > res_sz)
|
|
break; /* the content is larger than the container */
|
|
|
|
vinfo_val_sz >>= 16;
|
|
if(vinfo_sz <= 6 + 0x20 + 2 + 0x34 ||
|
|
vinfo_val_sz != 0x34 ||
|
|
memcmp(vptr+6, "V\0S\0_\0V\0E\0R\0S\0I\0O\0N\0_\0I\0N\0F\0O\0\0\0", 0x20) ||
|
|
(unsigned int)cli_readint32(vptr + 0x28) != 0xfeef04bd) {
|
|
/* - there should be enough room for the header(6), the key "VS_VERSION_INFO"(20), the padding(2) and the value(34)
|
|
* - the value should be sizeof(fixedfileinfo)
|
|
* - the key should match
|
|
* - there should be some proper magic for fixedfileinfo */
|
|
break; /* there's no point in looking further */
|
|
}
|
|
|
|
/* move to the end of fixedfileinfo where the child elements are located */
|
|
vptr += 6 + 0x20 + 2 + 0x34;
|
|
vinfo_sz -= 6 + 0x20 + 2 + 0x34;
|
|
|
|
while(vinfo_sz > 6) { /* look for stringfileinfo - NOT RESUMABLE (expecting at most one stringfileinfo) */
|
|
uint32_t sfi_sz = cli_readint32(vptr) & 0xffff;
|
|
|
|
if(sfi_sz > vinfo_sz)
|
|
break; /* the content is larger than the container */
|
|
|
|
if(!got_varfileinfo && sfi_sz > 6 + 0x18 && !memcmp(vptr+6, "V\0a\0r\0F\0i\0l\0e\0I\0n\0f\0o\0\0\0", 0x18)) {
|
|
/* skip varfileinfo as it sometimes appear before stringtableinfo */
|
|
vptr += sfi_sz;
|
|
vinfo_sz -= sfi_sz;
|
|
got_varfileinfo = 1;
|
|
continue;
|
|
}
|
|
|
|
if(sfi_sz <= 6 + 0x1e || memcmp(vptr+6, "S\0t\0r\0i\0n\0g\0F\0i\0l\0e\0I\0n\0f\0o\0\0\0", 0x1e)) {
|
|
/* - there should be enough room for the header(6) and the key "StringFileInfo"(1e)
|
|
* - the key should match */
|
|
break; /* this is an implicit hard fail: parent is not resumable */
|
|
}
|
|
|
|
/* move to the end of stringfileinfo where the child elements are located */
|
|
vptr += 6 + 0x1e;
|
|
sfi_sz -= 6 + 0x1e;
|
|
|
|
while(sfi_sz > 6) { /* enum all stringtables - RESUMABLE */
|
|
uint32_t st_sz = cli_readint32(vptr) & 0xffff;
|
|
const uint8_t *next_vptr = vptr + st_sz;
|
|
uint32_t next_sfi_sz = sfi_sz - st_sz;
|
|
|
|
if(st_sz > sfi_sz || st_sz <= 24) {
|
|
/* - the content is larger than the container
|
|
- there's no room for a stringtables (headers(6) + key(16) + padding(2)) */
|
|
break; /* this is an implicit hard fail: parent is not resumable */
|
|
}
|
|
|
|
/* move to the end of stringtable where the child elements are located */
|
|
vptr += 24;
|
|
st_sz -= 24;
|
|
|
|
while(st_sz > 6) { /* enum all strings - RESUMABLE */
|
|
uint32_t s_sz, s_key_sz, s_val_sz;
|
|
|
|
s_sz = (cli_readint32(vptr) & 0xffff) + 3;
|
|
s_sz &= ~3;
|
|
if(s_sz > st_sz || s_sz <= 6 + 2 + 8) {
|
|
/* - the content is larger than the container
|
|
* - there's no room for a minimal string
|
|
* - there's no room for the value */
|
|
st_sz = 0;
|
|
sfi_sz = 0;
|
|
break; /* force a hard fail */
|
|
}
|
|
|
|
/* ~wcstrlen(key) */
|
|
for(s_key_sz = 6; s_key_sz+1 < s_sz; s_key_sz += 2) {
|
|
if(vptr[s_key_sz] || vptr[s_key_sz+1])
|
|
continue;
|
|
|
|
s_key_sz += 2;
|
|
break;
|
|
}
|
|
|
|
s_key_sz += 3;
|
|
s_key_sz &= ~3;
|
|
|
|
if(s_key_sz >= s_sz) {
|
|
/* key overflow */
|
|
vptr += s_sz;
|
|
st_sz -= s_sz;
|
|
continue;
|
|
}
|
|
|
|
s_val_sz = s_sz - s_key_sz;
|
|
s_key_sz -= 6;
|
|
|
|
if(s_val_sz <= 2) {
|
|
/* skip unset value */
|
|
vptr += s_sz;
|
|
st_sz -= s_sz;
|
|
continue;
|
|
}
|
|
|
|
if(cli_hashset_addkey(&peinfo->vinfo, (uint32_t)(vptr - baseptr + 6))) {
|
|
cli_errmsg("cli_peheader: Unable to add rva to vinfo hashset\n");
|
|
cli_hashset_destroy(&peinfo->vinfo);
|
|
free(section_hdr);
|
|
free(peinfo->section);
|
|
peinfo->section = NULL;
|
|
return -1;
|
|
}
|
|
|
|
if(cli_debug_flag) {
|
|
char *k, *v, *s;
|
|
|
|
/* FIXME: skip too long strings */
|
|
k = cli_utf16toascii((const char*)vptr + 6, s_key_sz);
|
|
if(k) {
|
|
v = cli_utf16toascii((const char*)vptr + s_key_sz + 6, s_val_sz);
|
|
if(v) {
|
|
s = cli_str2hex((const char*)vptr + 6, s_key_sz + s_val_sz);
|
|
if(s) {
|
|
cli_dbgmsg("VersionInfo (%x): '%s'='%s' - VI:%s\n", (uint32_t)(vptr - baseptr + 6), k, v, s);
|
|
free(s);
|
|
}
|
|
free(v);
|
|
}
|
|
free(k);
|
|
}
|
|
}
|
|
vptr += s_sz;
|
|
st_sz -= s_sz;
|
|
} /* enum all strings - RESUMABLE */
|
|
vptr = next_vptr;
|
|
sfi_sz = next_sfi_sz * (sfi_sz != 0);
|
|
} /* enum all stringtables - RESUMABLE */
|
|
break;
|
|
} /* look for stringfileinfo - NOT RESUMABLE */
|
|
break;
|
|
} /* look for version_info - NOT RESUMABLE */
|
|
} /* enum all version_information res - RESUMABLE */
|
|
break;
|
|
} /* while(dirs[2].Size) */
|
|
|
|
free(section_hdr);
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int sort_sects(const void *first, const void *second) {
|
|
const struct cli_exe_section *a = first, *b = second;
|
|
return (a->raw - b->raw);
|
|
}
|
|
|
|
int cli_checkfp_pe(cli_ctx *ctx, uint8_t *authsha1, stats_section_t *hashes, uint32_t flags) {
|
|
uint16_t e_magic; /* DOS signature ("MZ") */
|
|
uint16_t nsections;
|
|
uint32_t e_lfanew; /* address of new exe header */
|
|
struct pe_image_file_hdr file_hdr;
|
|
union {
|
|
struct pe_image_optional_hdr64 opt64;
|
|
struct pe_image_optional_hdr32 opt32;
|
|
} pe_opt;
|
|
const struct pe_image_section_hdr *section_hdr;
|
|
ssize_t at;
|
|
unsigned int i, pe_plus = 0, hlen;
|
|
size_t fsize;
|
|
uint32_t valign, falign, hdr_size;
|
|
struct cli_exe_section *exe_sections;
|
|
struct pe_image_data_dir *dirs;
|
|
fmap_t *map = *ctx->fmap;
|
|
void *hashctx=NULL;
|
|
|
|
if (flags & CL_CHECKFP_PE_FLAG_STATS)
|
|
if (!(hashes))
|
|
return CL_EFORMAT;
|
|
|
|
if (flags == CL_CHECKFP_PE_FLAG_NONE)
|
|
return CL_VIRUS;
|
|
|
|
if(!(DCONF & PE_CONF_CATALOG))
|
|
return CL_EFORMAT;
|
|
|
|
if(fmap_readn(map, &e_magic, 0, sizeof(e_magic)) != sizeof(e_magic))
|
|
return CL_EFORMAT;
|
|
|
|
if(EC16(e_magic) != PE_IMAGE_DOS_SIGNATURE && EC16(e_magic) != PE_IMAGE_DOS_SIGNATURE_OLD)
|
|
return CL_EFORMAT;
|
|
|
|
if(fmap_readn(map, &e_lfanew, 58 + sizeof(e_magic), sizeof(e_lfanew)) != sizeof(e_lfanew))
|
|
return CL_EFORMAT;
|
|
|
|
e_lfanew = EC32(e_lfanew);
|
|
if(!e_lfanew)
|
|
return CL_EFORMAT;
|
|
|
|
if(fmap_readn(map, &file_hdr, e_lfanew, sizeof(struct pe_image_file_hdr)) != sizeof(struct pe_image_file_hdr))
|
|
return CL_EFORMAT;
|
|
|
|
if(EC32(file_hdr.Magic) != PE_IMAGE_NT_SIGNATURE)
|
|
return CL_EFORMAT;
|
|
|
|
nsections = EC16(file_hdr.NumberOfSections);
|
|
if(nsections < 1 || nsections > 96)
|
|
return CL_EFORMAT;
|
|
|
|
if(EC16(file_hdr.SizeOfOptionalHeader) < sizeof(struct pe_image_optional_hdr32))
|
|
return CL_EFORMAT;
|
|
|
|
at = e_lfanew + sizeof(struct pe_image_file_hdr);
|
|
if(fmap_readn(map, &optional_hdr32, at, sizeof(struct pe_image_optional_hdr32)) != sizeof(struct pe_image_optional_hdr32))
|
|
return CL_EFORMAT;
|
|
|
|
at += sizeof(struct pe_image_optional_hdr32);
|
|
|
|
/* This will be a chicken and egg problem until we drop 9x */
|
|
if(EC16(optional_hdr64.Magic)==PE32P_SIGNATURE) {
|
|
if(EC16(file_hdr.SizeOfOptionalHeader)!=sizeof(struct pe_image_optional_hdr64))
|
|
return CL_EFORMAT;
|
|
|
|
pe_plus = 1;
|
|
}
|
|
|
|
if(!pe_plus) { /* PE */
|
|
if (EC16(file_hdr.SizeOfOptionalHeader)!=sizeof(struct pe_image_optional_hdr32)) {
|
|
/* Seek to the end of the long header */
|
|
at += EC16(file_hdr.SizeOfOptionalHeader)-sizeof(struct pe_image_optional_hdr32);
|
|
}
|
|
|
|
hdr_size = EC32(optional_hdr32.SizeOfHeaders);
|
|
dirs = optional_hdr32.DataDirectory;
|
|
} else { /* PE+ */
|
|
size_t readlen = sizeof(struct pe_image_optional_hdr64) - sizeof(struct pe_image_optional_hdr32);
|
|
/* read the remaining part of the header */
|
|
if((size_t)fmap_readn(map, &optional_hdr32 + 1, at, readlen) != readlen)
|
|
return CL_EFORMAT;
|
|
|
|
at += sizeof(struct pe_image_optional_hdr64) - sizeof(struct pe_image_optional_hdr32);
|
|
hdr_size = EC32(optional_hdr64.SizeOfHeaders);
|
|
dirs = optional_hdr64.DataDirectory;
|
|
}
|
|
|
|
fsize = map->len;
|
|
|
|
valign = (pe_plus)?EC32(optional_hdr64.SectionAlignment):EC32(optional_hdr32.SectionAlignment);
|
|
falign = (pe_plus)?EC32(optional_hdr64.FileAlignment):EC32(optional_hdr32.FileAlignment);
|
|
|
|
section_hdr = fmap_need_off_once(map, at, sizeof(*section_hdr) * nsections);
|
|
if(!section_hdr)
|
|
return CL_EFORMAT;
|
|
|
|
at += sizeof(*section_hdr) * nsections;
|
|
|
|
exe_sections = (struct cli_exe_section *) cli_calloc(nsections, sizeof(struct cli_exe_section));
|
|
if(!exe_sections)
|
|
return CL_EMEM;
|
|
|
|
for(i = 0; falign!=0x200 && i<nsections; i++) {
|
|
/* file alignment fallback mode - blah */
|
|
if (falign && section_hdr[i].SizeOfRawData && EC32(section_hdr[i].PointerToRawData)%falign && !(EC32(section_hdr[i].PointerToRawData)%0x200))
|
|
falign = 0x200;
|
|
}
|
|
|
|
hdr_size = PESALIGN(hdr_size, falign); /* Aligned headers virtual size */
|
|
|
|
if (flags & CL_CHECKFP_PE_FLAG_STATS) {
|
|
hashes->nsections = nsections;
|
|
hashes->sections = cli_calloc(nsections, sizeof(struct cli_section_hash));
|
|
if (!(hashes->sections)) {
|
|
free(exe_sections);
|
|
return CL_EMEM;
|
|
}
|
|
}
|
|
|
|
for(i = 0; i < nsections; i++) {
|
|
exe_sections[i].rva = PEALIGN(EC32(section_hdr[i].VirtualAddress), valign);
|
|
exe_sections[i].vsz = PESALIGN(EC32(section_hdr[i].VirtualSize), valign);
|
|
exe_sections[i].raw = PEALIGN(EC32(section_hdr[i].PointerToRawData), falign);
|
|
exe_sections[i].rsz = PESALIGN(EC32(section_hdr[i].SizeOfRawData), falign);
|
|
|
|
if (!exe_sections[i].vsz && exe_sections[i].rsz)
|
|
exe_sections[i].vsz=PESALIGN(exe_sections[i].ursz, valign);
|
|
|
|
if (exe_sections[i].rsz && fsize>exe_sections[i].raw && !CLI_ISCONTAINED(0, (uint32_t) fsize, exe_sections[i].raw, exe_sections[i].rsz))
|
|
exe_sections[i].rsz = fsize - exe_sections[i].raw;
|
|
|
|
if (exe_sections[i].rsz && exe_sections[i].raw >= fsize) {
|
|
free(exe_sections);
|
|
return CL_EFORMAT;
|
|
}
|
|
|
|
if (exe_sections[i].urva>>31 || exe_sections[i].uvsz>>31 || (exe_sections[i].rsz && exe_sections[i].uraw>>31) || exe_sections[i].ursz>>31) {
|
|
free(exe_sections);
|
|
return CL_EFORMAT;
|
|
}
|
|
}
|
|
|
|
cli_qsort(exe_sections, nsections, sizeof(*exe_sections), sort_sects);
|
|
hashctx = cl_hash_init("sha1");
|
|
if (!(hashctx)) {
|
|
if (flags & CL_CHECKFP_PE_FLAG_AUTHENTICODE)
|
|
flags ^= CL_CHECKFP_PE_FLAG_AUTHENTICODE;
|
|
}
|
|
|
|
if (flags & CL_CHECKFP_PE_FLAG_AUTHENTICODE) {
|
|
/* Check to see if we have a security section. */
|
|
if(!cli_hm_have_size(ctx->engine->hm_fp, CLI_HASH_SHA1, 2) && dirs[4].Size < 8) {
|
|
if (flags & CL_CHECKFP_PE_FLAG_STATS) {
|
|
/* If stats is enabled, continue parsing the sample */
|
|
flags ^= CL_CHECKFP_PE_FLAG_AUTHENTICODE;
|
|
} else {
|
|
if (hashctx)
|
|
cl_hash_destroy(hashctx);
|
|
return CL_BREAK;
|
|
}
|
|
}
|
|
}
|
|
|
|
#define hash_chunk(where, size, isStatAble, section) \
|
|
do { \
|
|
const uint8_t *hptr; \
|
|
if(!(size)) break; \
|
|
if(!(hptr = fmap_need_off_once(map, where, size))){ \
|
|
free(exe_sections); \
|
|
if (hashctx) \
|
|
cl_hash_destroy(hashctx); \
|
|
return CL_EFORMAT; \
|
|
} \
|
|
if (flags & CL_CHECKFP_PE_FLAG_AUTHENTICODE && hashctx) \
|
|
cl_update_hash(hashctx, (void *)hptr, size); \
|
|
if (isStatAble && flags & CL_CHECKFP_PE_FLAG_STATS) { \
|
|
void *md5ctx; \
|
|
md5ctx = cl_hash_init("md5"); \
|
|
if (md5ctx) { \
|
|
cl_update_hash(md5ctx, (void *)hptr, size); \
|
|
cl_finish_hash(md5ctx, hashes->sections[section].md5); \
|
|
} \
|
|
} \
|
|
} while(0)
|
|
|
|
while (flags & CL_CHECKFP_PE_FLAG_AUTHENTICODE) {
|
|
/* MZ to checksum */
|
|
at = 0;
|
|
hlen = e_lfanew + sizeof(struct pe_image_file_hdr) + (pe_plus ? offsetof(struct pe_image_optional_hdr64, CheckSum) : offsetof(struct pe_image_optional_hdr32, CheckSum));
|
|
hash_chunk(0, hlen, 0, 0);
|
|
at = hlen + 4;
|
|
|
|
/* Checksum to security */
|
|
if(pe_plus)
|
|
hlen = offsetof(struct pe_image_optional_hdr64, DataDirectory[4]) - offsetof(struct pe_image_optional_hdr64, CheckSum) - 4;
|
|
else
|
|
hlen = offsetof(struct pe_image_optional_hdr32, DataDirectory[4]) - offsetof(struct pe_image_optional_hdr32, CheckSum) - 4;
|
|
hash_chunk(at, hlen, 0, 0);
|
|
at += hlen + 8;
|
|
|
|
if(at > hdr_size) {
|
|
if (flags & CL_CHECKFP_PE_FLAG_STATS) {
|
|
flags ^= CL_CHECKFP_PE_FLAG_AUTHENTICODE;
|
|
break;
|
|
} else {
|
|
free(exe_sections);
|
|
if (hashctx)
|
|
cl_hash_destroy(hashctx);
|
|
return CL_EFORMAT;
|
|
}
|
|
}
|
|
|
|
/* Security to End of header */
|
|
hlen = hdr_size - at;
|
|
hash_chunk(at, hlen, 0, 0);
|
|
|
|
at = hdr_size;
|
|
break;
|
|
}
|
|
|
|
/* Hash the sections */
|
|
for(i = 0; i < nsections; i++) {
|
|
if(!exe_sections[i].rsz)
|
|
continue;
|
|
|
|
hash_chunk(exe_sections[i].raw, exe_sections[i].rsz, 1, i);
|
|
if (flags & CL_CHECKFP_PE_FLAG_AUTHENTICODE)
|
|
at += exe_sections[i].rsz;
|
|
}
|
|
|
|
while (flags & CL_CHECKFP_PE_FLAG_AUTHENTICODE) {
|
|
if((size_t)at < fsize) {
|
|
hlen = fsize - at;
|
|
if(dirs[4].Size > hlen) {
|
|
if (flags & CL_CHECKFP_PE_FLAG_STATS) {
|
|
flags ^= CL_CHECKFP_PE_FLAG_AUTHENTICODE;
|
|
break;
|
|
} else {
|
|
free(exe_sections);
|
|
if (hashctx)
|
|
cl_hash_destroy(hashctx);
|
|
return CL_EFORMAT;
|
|
}
|
|
}
|
|
|
|
hlen -= dirs[4].Size;
|
|
hash_chunk(at, hlen, 0, 0);
|
|
at += hlen;
|
|
}
|
|
|
|
break;
|
|
} while (0);
|
|
|
|
free(exe_sections);
|
|
|
|
if (flags & CL_CHECKFP_PE_FLAG_AUTHENTICODE && hashctx) {
|
|
cl_finish_hash(hashctx, authsha1);
|
|
|
|
if(cli_debug_flag) {
|
|
char shatxt[SHA1_HASH_SIZE*2+1];
|
|
for(i=0; i<SHA1_HASH_SIZE; i++)
|
|
sprintf(&shatxt[i*2], "%02x", authsha1[i]);
|
|
cli_dbgmsg("Authenticode: %s\n", shatxt);
|
|
}
|
|
|
|
hlen = dirs[4].Size;
|
|
if(hlen < 8)
|
|
return CL_VIRUS;
|
|
|
|
hlen -= 8;
|
|
|
|
return asn1_check_mscat((struct cl_engine *)(ctx->engine), map, at + 8, hlen, authsha1);
|
|
} else {
|
|
if (hashctx)
|
|
cl_hash_destroy(hashctx);
|
|
return CL_VIRUS;
|
|
}
|
|
}
|
|
|