2024-04-19_9e3242c6cd7a21a5c495e8a3179c11c1_cobalt-strike_ryuk

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General

Target

2024-04-19_9e3242c6cd7a21a5c495e8a3179c11c1_cobalt-strike_ryuk
Size

299KB
MD5

9e3242c6cd7a21a5c495e8a3179c11c1
SHA1

06f6b7455aef3255083a4ebacb9cd210575dc1a2
SHA256

22d8e6558049d9bc30157f41815c83be535d4b69654d12e980e90bcd3b3d0887
SHA512

3810b00d2a41415bf10d74a2e88942e06c82baaf9fd33de055ec893960a15502e3a28d709e0f2d4428060c9a670145e8b34781f4e9caf7db33ed5c85d38b6cb4
SSDEEP

6144:7aAsGAtsxPEZ7fVZjHY1/AlnHLfXvX/Mp4:7rsZtm8shinTX

Score

10^/10

Malware Config

Signatures

Detects Windows executables referencing non-Windows User-Agents 1 IoCs

resource	yara_rule
sample	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA

Unsigned PE 1 IoCs

Checks for missing Authenticode signature.

resource
2024-04-19_9e3242c6cd7a21a5c495e8a3179c11c1_cobalt-strike_ryuk

Files

2024-04-19_9e3242c6cd7a21a5c495e8a3179c11c1_cobalt-strike_ryuk
.exe windows:6 windows x64 arch:x64

ab25f915bd761c471afb3e252e9e1d2c

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

AreFileApisANSI
CloseHandle
CompareStringW
CreateEventW
CreateFileA
CreateFileMappingW
CreateFileW
DeleteCriticalSection
EncodePointer
EnterCriticalSection
ExitProcess
FindClose
FindFirstFileExW
FindFirstFileW
FindNextFileW
FindResourceW
FlushFileBuffers
FormatMessageA
FreeEnvironmentStringsW
FreeLibrary
GetACP
GetCPInfo
GetCommandLineA
GetCommandLineW
GetConsoleMode
GetConsoleOutputCP
GetCurrentProcess
GetCurrentProcessId
GetCurrentThreadId
GetEnvironmentStringsW
GetFileAttributesExW
GetFileInformationByHandleEx
GetFileType
GetLastError
GetLocaleInfoEx
GetModuleFileNameA
GetModuleFileNameW
GetModuleHandleExW
GetModuleHandleW
GetOEMCP
GetProcAddress
GetProcessHeap
GetStartupInfoW
GetStdHandle
GetStringTypeW
GetSystemTimeAsFileTime
HeapAlloc
HeapFree
HeapReAlloc
HeapSize
InitializeCriticalSectionAndSpinCount
InitializeCriticalSectionEx
InitializeSListHead
IsDebuggerPresent
IsProcessorFeaturePresent
IsValidCodePage
LCMapStringW
LeaveCriticalSection
LoadLibraryExW
LoadResource
LocalFree
LockResource
MapViewOfFile
MultiByteToWideChar
QueryPerformanceCounter
QueryPerformanceFrequency
RaiseException
ResetEvent
RtlCaptureContext
RtlLookupFunctionEntry
RtlPcToFileHeader
RtlUnwindEx
RtlVirtualUnwind
SetEnvironmentVariableW
SetEvent
SetFilePointerEx
SetLastError
SetStdHandle
SetUnhandledExceptionFilter
SizeofResource
Sleep
TerminateProcess
TlsAlloc
TlsFree
TlsGetValue
TlsSetValue
UnhandledExceptionFilter
UnmapViewOfFile
VirtualAlloc
WaitForSingleObjectEx
WideCharToMultiByte
WriteConsoleW
WriteFile

advapi32

RegCloseKey
RegCreateKeyA
RegSetValueExA

wininet

InternetOpenUrlA
InternetOpenW
InternetReadFile

Sections

.text
Size: 187KB - Virtual size: 187KB

IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ

.rdata
Size: 65KB - Virtual size: 65KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.data
Size: 26KB - Virtual size: 32KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

.pdata
Size: 9KB - Virtual size: 9KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.tls
Size: 512B - Virtual size: 9B

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

_RDATA
Size: 512B - Virtual size: 348B

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.rsrc
Size: 512B - Virtual size: 344B

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.reloc
Size: 8KB - Virtual size: 7KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ

Sharing

General

Malware Config

Signatures

Files

ab25f915bd761c471afb3e252e9e1d2c

Headers

DLL Characteristics

File Characteristics

Imports

kernel32

advapi32

wininet

Sections

.text Size: 187KB - Virtual size: 187KB

.rdata Size: 65KB - Virtual size: 65KB

.data Size: 26KB - Virtual size: 32KB

.pdata Size: 9KB - Virtual size: 9KB

.tls Size: 512B - Virtual size: 9B

_RDATA Size: 512B - Virtual size: 348B

.rsrc Size: 512B - Virtual size: 344B

.reloc Size: 8KB - Virtual size: 7KB

.text
Size: 187KB - Virtual size: 187KB

.rdata
Size: 65KB - Virtual size: 65KB

.data
Size: 26KB - Virtual size: 32KB

.pdata
Size: 9KB - Virtual size: 9KB

.tls
Size: 512B - Virtual size: 9B

_RDATA
Size: 512B - Virtual size: 348B

.rsrc
Size: 512B - Virtual size: 344B

.reloc
Size: 8KB - Virtual size: 7KB