Behavioral task
behavioral1
Sample
WeChatApi.dll
Resource
win7-20240508-en
Behavioral task
behavioral2
Sample
WeChatApi.dll
Resource
win10v2004-20240426-en
General
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Target
WeChatApi.dll
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Size
5.0MB
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MD5
64cb07267f6f579bc7e39b2bca935eb2
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SHA1
5d372e597d77a189878f6b707d032e5b6b4d54c0
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SHA256
9f04c938d2ebac8d64e62f8072f1abee0fad360e3b2bd9a58f5f2f60403c86f0
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SHA512
893f89f12f3b275dcc775f39a4ffb4cefd9ba1e4839778200cca1ccfdea8b2f2643b43c4b6ca8322109ca5df850703667f917b1194a98392425cf61f544c94e2
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SSDEEP
98304:FVcmOLhbmV1vzJAWkS4IVyll0pyWL9pU/9N6nUO7uw1b+EeUeFbJI5s:FV5OlbmzvN5kSJVzwWLLUyUvwP35
Malware Config
Signatures
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resource yara_rule sample vmprotect -
Unsigned PE 1 IoCs
Checks for missing Authenticode signature.
resource WeChatApi.dll
Files
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WeChatApi.dll.dll windows:6 windows x86 arch:x86
2d159fc1f30b697665b8c6b34c4e5151
Headers
DLL Characteristics
IMAGE_DLLCHARACTERISTICS_DYNAMIC_BASE
IMAGE_DLLCHARACTERISTICS_NX_COMPAT
File Characteristics
IMAGE_FILE_EXECUTABLE_IMAGE
IMAGE_FILE_32BIT_MACHINE
IMAGE_FILE_DLL
Imports
ws2_32
getsockname
wldap32
ord211
crypt32
CertFreeCertificateChain
normaliz
IdnToAscii
kernel32
GetVersionExA
LocalAlloc
LocalFree
GetModuleFileNameW
GetProcessAffinityMask
SetProcessAffinityMask
SetThreadAffinityMask
Sleep
ExitProcess
FreeLibrary
LoadLibraryA
GetModuleHandleA
GetProcAddress
advapi32
RegEnumKeyExW
bcrypt
BCryptGenRandom
dbghelp
SymFromAddr
user32
GetProcessWindowStation
GetUserObjectInformationW
Sections
.text Size: - Virtual size: 3.5MB
IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ
.rdata Size: - Virtual size: 853KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
.data Size: - Virtual size: 80KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
.vmp0 Size: - Virtual size: 1.6MB
IMAGE_SCN_CNT_CODE
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ
.vmp1 Size: 5.0MB - Virtual size: 5.0MB
IMAGE_SCN_CNT_CODE
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ
.reloc Size: 1KB - Virtual size: 1KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
.rsrc Size: 512B - Virtual size: 233B
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ