Static task
static1
Behavioral task
behavioral1
Sample
2024-05-01_a3f35d00384027d83681f1bfa5b0a368_cobalt-strike_ryuk.exe
Resource
win7-20240215-en
Behavioral task
behavioral2
Sample
2024-05-01_a3f35d00384027d83681f1bfa5b0a368_cobalt-strike_ryuk.exe
Resource
win10v2004-20240419-en
General
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Target
2024-05-01_a3f35d00384027d83681f1bfa5b0a368_cobalt-strike_ryuk
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Size
729KB
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MD5
a3f35d00384027d83681f1bfa5b0a368
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SHA1
a111c44d63ef11fa1fdd2889952c082e41e97407
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SHA256
de38ea1109e9fc623c7ffed5b588660588d8b3b1106e35d3dc390a71c8b355df
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SHA512
5182b9fbe76c78b7e3dac87be7a6ce97e74c9bba4cd4eeb7353690aa33373eb04c414835e600c55ec66947eea474ba3bdf9a033003ce10086ba393753b6d5764
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SSDEEP
12288:7IkRpq72XTNSgrcwgHT5k92r2DfF7FoS2u2XqHgZAFDKiHoChoZ:7uwQg8m9ZEfu26HgZs1hoZ
Malware Config
Signatures
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Unsigned PE 1 IoCs
Checks for missing Authenticode signature.
resource 2024-05-01_a3f35d00384027d83681f1bfa5b0a368_cobalt-strike_ryuk
Files
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2024-05-01_a3f35d00384027d83681f1bfa5b0a368_cobalt-strike_ryuk.exe windows:6 windows x64 arch:x64
2f3f04fc391cc1433ae0859fe807af73
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
kernel32
AcquireSRWLockExclusive
AllocConsole
CloseHandle
CompareStringW
CreateFileA
CreateFileMappingW
CreateFileW
CreateThread
DecodePointer
DeleteCriticalSection
DeleteFileA
EncodePointer
EnterCriticalSection
EnumSystemLocalesW
ExitProcess
ExitThread
FindClose
FindFirstFileExW
FindNextFileW
FlushFileBuffers
FreeEnvironmentStringsW
FreeLibrary
FreeLibraryAndExitThread
GetACP
GetCPInfo
GetCommandLineA
GetCommandLineW
GetConsoleMode
GetConsoleOutputCP
GetConsoleWindow
GetCurrentDirectoryW
GetCurrentProcess
GetCurrentProcessId
GetCurrentThread
GetCurrentThreadId
GetDriveTypeW
GetEnvironmentStringsW
GetExitCodeThread
GetFileSize
GetFileSizeEx
GetFileType
GetFullPathNameW
GetLargePageMinimum
GetLastError
GetLocaleInfoW
GetModuleFileNameW
GetModuleHandleExW
GetModuleHandleW
GetOEMCP
GetProcAddress
GetProcessHeap
GetStartupInfoW
GetStdHandle
GetStringTypeW
GetSystemTimeAsFileTime
GetUserDefaultLCID
HeapAlloc
HeapFree
HeapReAlloc
HeapSize
InitializeCriticalSectionAndSpinCount
InitializeCriticalSectionEx
InitializeSListHead
IsDebuggerPresent
IsProcessorFeaturePresent
IsValidCodePage
IsValidLocale
LCMapStringEx
LCMapStringW
LeaveCriticalSection
LoadLibraryExW
LoadLibraryW
MapViewOfFile
MultiByteToWideChar
QueryPerformanceCounter
QueryPerformanceFrequency
RaiseException
ReadConsoleW
ReadFile
ReleaseSRWLockExclusive
RtlCaptureContext
RtlLookupFunctionEntry
RtlPcToFileHeader
RtlUnwind
RtlUnwindEx
RtlVirtualUnwind
SetConsoleScreenBufferSize
SetConsoleTextAttribute
SetConsoleWindowInfo
SetEndOfFile
SetEnvironmentVariableW
SetFilePointerEx
SetLastError
SetStdHandle
SetUnhandledExceptionFilter
SleepConditionVariableSRW
TerminateProcess
TlsAlloc
TlsFree
TlsGetValue
TlsSetValue
TryAcquireSRWLockExclusive
UnhandledExceptionFilter
UnmapViewOfFile
VirtualAlloc
VirtualFree
WaitForSingleObjectEx
WakeAllConditionVariable
WakeConditionVariable
WideCharToMultiByte
WriteConsoleW
WriteFile
user32
ShowWindow
UpdateWindow
Sections
.text Size: 561KB - Virtual size: 561KB
IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ
.rdata Size: 132KB - Virtual size: 132KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
.data Size: 8KB - Virtual size: 1.2MB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
.pdata Size: 21KB - Virtual size: 20KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
.00cfg Size: 512B - Virtual size: 56B
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
.tls Size: 1024B - Virtual size: 649B
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
_RDATA Size: 512B - Virtual size: 500B
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
.rsrc Size: 512B - Virtual size: 424B
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
.reloc Size: 3KB - Virtual size: 2KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ