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Behavioral task
behavioral1
Sample
77.91.77.exe
Resource
win7-20240729-en
Behavioral task
behavioral2
Sample
77.91.77.exe
Resource
win10-20240404-en
Behavioral task
behavioral3
Sample
77.91.77.exe
Resource
win10v2004-20240802-en
Behavioral task
behavioral4
Sample
77.91.77.exe
Resource
win11-20240802-en
General
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Target
77.91.77.81.zip
-
Size
786KB
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MD5
a188376c0fb3a7baf60eab5e0b3ee858
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SHA1
10c9edff8b3b1f9ff4daa951c5449009f5c02af1
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SHA256
f13e79d39281b7f0214c1959a225a6476b8076acc7667fd8362a269b545dbbe2
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SHA512
d3570b71dbcb7514f97c213268212166f366d71727e2bb8fd459aed976be58d7ba9ce1c1972463986bde97dac3c47c473f4ad613607f0f317ee20e2f617c5356
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SSDEEP
12288:RKjn2tVF1h64x90TT+1eJEsrUNOy9Vl1sDUzFRBVlfyFzuFzTutKj15CQV:RVl390/+OrUNffsDUZfuzKTNj1g6
Malware Config
Signatures
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resource yara_rule static1/unpack001/77.91.77.81 DeerStealer -
Deerstealer family
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Unsigned PE 1 IoCs
Checks for missing Authenticode signature.
resource unpack001/77.91.77.81
Files
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77.91.77.81.zip.zip
Password: infected
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77.91.77.81.exe windows:4 windows x64 arch:x64
Password: infected
a338797fb02813f0ef44a2dae655cd61
Headers
DLL Characteristics
IMAGE_DLLCHARACTERISTICS_HIGH_ENTROPY_VA
IMAGE_DLLCHARACTERISTICS_DYNAMIC_BASE
IMAGE_DLLCHARACTERISTICS_NX_COMPAT
File Characteristics
IMAGE_FILE_EXECUTABLE_IMAGE
IMAGE_FILE_LINE_NUMS_STRIPPED
IMAGE_FILE_LOCAL_SYMS_STRIPPED
IMAGE_FILE_LARGE_ADDRESS_AWARE
IMAGE_FILE_DEBUG_STRIPPED
Imports
kernel32
DeleteCriticalSection
EnterCriticalSection
GetLastError
GetProcAddress
GetStartupInfoA
InitializeCriticalSection
LeaveCriticalSection
LoadLibraryA
SetUnhandledExceptionFilter
Sleep
TlsAlloc
TlsGetValue
TlsSetValue
VirtualAlloc
VirtualFree
VirtualProtect
VirtualQuery
msvcrt
__C_specific_handler
__getmainargs
__initenv
__iob_func
__lconv_init
__set_app_type
__setusermatherr
_acmdln
_amsg_exit
_cexit
_commode
_fmode
_initterm
_onexit
abort
calloc
exit
fprintf
free
fwrite
malloc
memcpy
memset
signal
strlen
strncmp
vfprintf
Sections
.text Size: 1.6MB - Virtual size: 1.6MB
IMAGE_SCN_CNT_CODE
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ
.data Size: 2KB - Virtual size: 2KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
.rdata Size: 42KB - Virtual size: 42KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
.pdata Size: 18KB - Virtual size: 17KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
.xdata Size: 15KB - Virtual size: 14KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
.bss Size: - Virtual size: 407KB
IMAGE_SCN_CNT_UNINITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
.idata Size: 2KB - Virtual size: 1KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
.CRT Size: 512B - Virtual size: 104B
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
.tls Size: 512B - Virtual size: 16B
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
.rsrc Size: 512B - Virtual size: 312B
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
.reloc Size: 1024B - Virtual size: 804B
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ