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Behavioral task
behavioral1
Sample
win.exe
Resource
win7-20240215-en
Behavioral task
behavioral2
Sample
win.exe
Resource
win10v2004-20240226-en
General
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Target
win.exe
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Size
6.8MB
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MD5
0721b1d0c9c68c18116273f2c293ff21
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SHA1
dac53205b4ba718542138d90eb56f1641f5807b8
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SHA256
0c3ee3977deb2ab25d67d6b346b7c96497c4ff18b76678ca990b8493f23248a4
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SHA512
012ee21fa04e7e361d4565ba81cc8ba256fb48a75cc93c5c6ea1f77f1e69adc3a5c14275dfe358e72b6f41dd67d174c0bbb4ca26d39f9c08168ccbb9d06d3ba9
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SSDEEP
49152:k92mic7iMnbPvRUAm+ugRkqjR7Q8TOc5KubExvCsNGEgveIXB4IuBNT/IeswF69B:BmP7i+Rf0es5u2BNTAcSE8wIX
Malware Config
Signatures
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StealthWorker payload 1 IoCs
resource yara_rule sample stealthworker -
Stealthworker family
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Unsigned PE 1 IoCs
Checks for missing Authenticode signature.
resource win.exe
Files
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win.exe.exe windows:4 windows x86 arch:x86
1c2a6fbef41572f4c9ce8acb5a63cde7
Headers
File Characteristics
IMAGE_FILE_RELOCS_STRIPPED
IMAGE_FILE_EXECUTABLE_IMAGE
IMAGE_FILE_32BIT_MACHINE
IMAGE_FILE_DEBUG_STRIPPED
Imports
winmm
timeEndPeriod
timeBeginPeriod
ws2_32
WSAGetOverlappedResult
kernel32
WriteFile
WriteConsoleW
WaitForSingleObject
VirtualQuery
VirtualFree
VirtualAlloc
SwitchToThread
SetWaitableTimer
SetUnhandledExceptionFilter
SetProcessPriorityBoost
SetEvent
SetErrorMode
SetConsoleCtrlHandler
LoadLibraryA
LoadLibraryW
GetSystemInfo
GetStdHandle
GetQueuedCompletionStatus
GetProcessAffinityMask
GetProcAddress
GetEnvironmentStringsW
GetConsoleMode
FreeEnvironmentStringsW
ExitProcess
DuplicateHandle
CreateThread
CreateIoCompletionPort
CreateEventA
CloseHandle
AddVectoredExceptionHandler
Sections
.text Size: 3.1MB - Virtual size: 3.1MB
IMAGE_SCN_CNT_CODE
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ
.rdata Size: 3.4MB - Virtual size: 3.4MB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ
.data Size: 198KB - Virtual size: 285KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
.idata Size: 1024B - Virtual size: 902B
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
.symtab Size: 512B - Virtual size: 4B
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ