Static task
static1
Behavioral task
behavioral1
Sample
2024-02-13_38ef1b04f943d44df95397a5f213c906_cobalt-strike_ryuk.exe
Resource
win7-20231215-en
Behavioral task
behavioral2
Sample
2024-02-13_38ef1b04f943d44df95397a5f213c906_cobalt-strike_ryuk.exe
Resource
win10v2004-20231215-en
General
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Target
2024-02-13_38ef1b04f943d44df95397a5f213c906_cobalt-strike_ryuk
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Size
201KB
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MD5
38ef1b04f943d44df95397a5f213c906
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SHA1
83d0172e5c6af4ea7ba8170d5baa128f55c6b948
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SHA256
59875eace9dda9b9cec89733b77f22b274b2fd14ae67e723d4b007114f15e632
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SHA512
083ad84bcb3482bf5c3fabf5d3fb3425f82ae6172dc964bf53ef12d8bba807ef2ea5c0af3af691fa1e48120b0e60299bef150abc46fd470ef29ba2df30c04f84
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SSDEEP
3072:+EsnXqEVU7txWsB48AyoCMwLiX5MlV2fHH5DZAkWC:yXqEVU7vTAyoCM2iJoQ5
Malware Config
Signatures
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Unsigned PE 1 IoCs
Checks for missing Authenticode signature.
resource 2024-02-13_38ef1b04f943d44df95397a5f213c906_cobalt-strike_ryuk
Files
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2024-02-13_38ef1b04f943d44df95397a5f213c906_cobalt-strike_ryuk.exe windows:6 windows x64 arch:x64
e1da10843448572263082a39d69554b7
Headers
DLL Characteristics
IMAGE_DLLCHARACTERISTICS_HIGH_ENTROPY_VA
IMAGE_DLLCHARACTERISTICS_DYNAMIC_BASE
IMAGE_DLLCHARACTERISTICS_NX_COMPAT
IMAGE_DLLCHARACTERISTICS_TERMINAL_SERVER_AWARE
File Characteristics
IMAGE_FILE_EXECUTABLE_IMAGE
IMAGE_FILE_LARGE_ADDRESS_AWARE
Imports
user32
BeginPaint
CreateWindowExW
DefWindowProcA
DestroyWindow
DialogBoxParamA
DispatchMessageA
EndDialog
EndPaint
GetMessageA
LoadAcceleratorsA
LoadCursorA
LoadIconA
LoadStringW
PostQuitMessage
RegisterClassExW
ShowWindow
TranslateAcceleratorA
TranslateMessage
UpdateWindow
kernel32
CloseHandle
CreateFileW
DeleteCriticalSection
EncodePointer
EnterCriticalSection
ExitProcess
FindClose
FindFirstFileExW
FindNextFileW
FlsAlloc
FlsFree
FlsGetValue
FlsSetValue
FlushFileBuffers
FreeEnvironmentStringsW
FreeLibrary
GetACP
GetCPInfo
GetCommandLineA
GetCommandLineW
GetConsoleMode
GetConsoleOutputCP
GetCurrentProcess
GetCurrentProcessId
GetCurrentThreadId
GetEnvironmentStringsW
GetFileType
GetLastError
GetModuleFileNameW
GetModuleHandleExW
GetModuleHandleW
GetOEMCP
GetProcAddress
GetProcessHeap
GetStartupInfoW
GetStdHandle
GetStringTypeW
GetSystemTimeAsFileTime
HeapAlloc
HeapFree
HeapReAlloc
HeapSize
InitializeCriticalSectionAndSpinCount
InitializeSListHead
IsDebuggerPresent
IsProcessorFeaturePresent
IsValidCodePage
LCMapStringW
LeaveCriticalSection
LoadLibraryExW
MultiByteToWideChar
QueryPerformanceCounter
RaiseException
RtlCaptureContext
RtlLookupFunctionEntry
RtlPcToFileHeader
RtlUnwindEx
RtlVirtualUnwind
SetFilePointerEx
SetLastError
SetStdHandle
SetUnhandledExceptionFilter
TerminateProcess
TlsAlloc
TlsFree
TlsGetValue
TlsSetValue
UnhandledExceptionFilter
WideCharToMultiByte
WriteConsoleW
WriteFile
Sections
.text Size: 56KB - Virtual size: 56KB
IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ
.rdata Size: 37KB - Virtual size: 36KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
.data Size: 3KB - Virtual size: 7KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
.pdata Size: 4KB - Virtual size: 3KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
.00cfg Size: 512B - Virtual size: 56B
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
.gxfg Size: 4KB - Virtual size: 3KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
.retplne Size: 512B - Virtual size: 140B
_RDATA Size: 512B - Virtual size: 500B
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
.rsrc Size: 92KB - Virtual size: 92KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
.reloc Size: 2KB - Virtual size: 1KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ