2024-06-01_b84e55ed18d65135f02cfe71d96b03ed_cobalt-strike_ryuk

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General

Target

2024-06-01_b84e55ed18d65135f02cfe71d96b03ed_cobalt-strike_ryuk
Size

360KB
MD5

b84e55ed18d65135f02cfe71d96b03ed
SHA1

1dfc5dadc15679ab582c43eba819c1fa391d0dd8
SHA256

b754bce152f558256f6de6c82e5b60b9bde788da47cff0097bc48185eecce5ca
SHA512

3beb4bf493a87062d47505f682a6a3c58ff5df8b7c1050492a108b52eef38db7305e8acf0c6e249c75725b6b44c0bb82d06c3af4dfae66a57e6a5e03e5457cbe
SSDEEP

6144:4+lqv05mEoZiHQd3Qqd14+TkyoCfYuCv:Dokk3HT9o8Cv

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
2024-06-01_b84e55ed18d65135f02cfe71d96b03ed_cobalt-strike_ryuk

Files

2024-06-01_b84e55ed18d65135f02cfe71d96b03ed_cobalt-strike_ryuk
.exe windows:6 windows x64 arch:x64

7926264d61d3b10539f97cc99759e6ad

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
AreFileApisANSI
CloseHandle
CompareStringW
CreateFileA
CreateFileMappingW
CreateFileW
CreateToolhelp32Snapshot
DeleteCriticalSection
EncodePointer
EnterCriticalSection
ExitProcess
FindClose
FindFirstFileExW
FindFirstFileW
FindNextFileW
FindResourceW
FlsAlloc
FlsFree
FlsGetValue
FlsSetValue
FlushFileBuffers
FormatMessageA
FreeEnvironmentStringsW
FreeLibrary
GetACP
GetCPInfo
GetCommandLineA
GetCommandLineW
GetConsoleMode
GetConsoleOutputCP
GetCurrentProcess
GetCurrentProcessId
GetCurrentThreadId
GetEnvironmentStringsW
GetFileAttributesExW
GetFileInformationByHandleEx
GetFileSizeEx
GetFileType
GetLastError
GetLocaleInfoEx
GetModuleFileNameW
GetModuleHandleA
GetModuleHandleExW
GetModuleHandleW
GetOEMCP
GetProcAddress
GetProcessHeap
GetStartupInfoW
GetStdHandle
GetStringTypeW
GetSystemTimeAsFileTime
GetTempPathW
HeapAlloc
HeapFree
HeapReAlloc
HeapSize
InitializeCriticalSectionAndSpinCount
InitializeSListHead
IsDebuggerPresent
IsProcessorFeaturePresent
IsValidCodePage
K32GetModuleInformation
LCMapStringW
LeaveCriticalSection
LoadLibraryExW
LoadResource
LocalFree
LockResource
MapViewOfFile
MultiByteToWideChar
Process32FirstW
Process32NextW
QueryPerformanceCounter
QueryPerformanceFrequency
RaiseException
ReleaseSRWLockExclusive
RtlCaptureContext
RtlLookupFunctionEntry
RtlPcToFileHeader
RtlUnwindEx
RtlVirtualUnwind
SetEnvironmentVariableW
SetFilePointerEx
SetLastError
SetStdHandle
SetUnhandledExceptionFilter
SizeofResource
SleepConditionVariableSRW
TerminateProcess
TlsAlloc
TlsFree
TlsGetValue
TlsSetValue
UnhandledExceptionFilter
VirtualProtect
WakeAllConditionVariable
WideCharToMultiByte
WriteConsoleW
WriteFile

user32

GetCursorPos
MessageBoxA

wininet

InternetOpenUrlA
InternetOpenW
InternetReadFile

ntdll

NtAllocateVirtualMemory
NtCreateUserProcess
NtOpenProcess
NtProtectVirtualMemory
NtQueueApcThread
NtResumeThread
NtWriteVirtualMemory
RtlAllocateHeap
RtlCreateProcessParametersEx
RtlInitUnicodeString

Sections

.text
Size: 235KB - Virtual size: 234KB

IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ

.rdata
Size: 71KB - Virtual size: 71KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.data
Size: 26KB - Virtual size: 31KB

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

.00cfg
Size: 512B - Virtual size: 56B

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.gxfg
Size: 6KB - Virtual size: 5KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.retplne
Size: 512B - Virtual size: 140B

.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: 412B

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

7926264d61d3b10539f97cc99759e6ad

Headers

DLL Characteristics

File Characteristics

Imports

kernel32

user32

wininet

ntdll

Sections

.text Size: 235KB - Virtual size: 234KB

.rdata Size: 71KB - Virtual size: 71KB

.data Size: 26KB - Virtual size: 31KB

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

.00cfg Size: 512B - Virtual size: 56B

.gxfg Size: 6KB - Virtual size: 5KB

.retplne Size: 512B - Virtual size: 140B

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

_RDATA Size: 512B - Virtual size: 348B

.rsrc Size: 512B - Virtual size: 412B

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

.text
Size: 235KB - Virtual size: 234KB

.rdata
Size: 71KB - Virtual size: 71KB

.data
Size: 26KB - Virtual size: 31KB

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

.00cfg
Size: 512B - Virtual size: 56B

.gxfg
Size: 6KB - Virtual size: 5KB

.retplne
Size: 512B - Virtual size: 140B

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

_RDATA
Size: 512B - Virtual size: 348B

.rsrc
Size: 512B - Virtual size: 412B

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