2024-04-04_51b72d4deef83c5eb4d61e350dfc428f_ryuk

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General

Target
2024-04-04_51b72d4deef83c5eb4d61e350dfc428f_ryuk
Size 1.9MB
Sample240404-nbj3rsdh66
SHA256 7327ed39ce6f64923be7ef0088b7c50c0c1be7e87c87f4b2e7b3630ce83bde15
MD5 51b72d4deef83c5eb4d61e350dfc428f
SHA1 cfcb34d101ba9a071fe4464e898d37a12f1775b3
SHA512 53351cfa081d1475b94424cb784f8dc3ec9e406a09189b7de07a04b199623ba5444f9c923fbd31b5ff640efac5f26d88369416282f267f9d982f93d08f3732bc
SSDEEP 49152:clOVDTtQY6SoNtaUJ67UnHpclbwbWAaJiwmcTdcoOcW+S8:jqSUHxqPFi8
MD5 SHA1 SHA512 SSDEEP

Score

3^/10

Malware Config

Signatures

Unsigned PE 1 IoCs

Checks for missing Authenticode signature.

resource
2024-04-04_51b72d4deef83c5eb4d61e350dfc428f_ryuk

File Explorer

2024-04-04_51b72d4deef83c5eb4d61e350dfc428f_ryuk

.exe 1.9MB

2024-04-04_51b72d4deef83c5eb4d61e350dfc428f_ryuk

IMPHASH 9eaf1e1f345d5eabac8a31ef2a96a701
SHA256 7327ed39ce6f64923be7ef0088b7c50c0c1be7e87c87f4b2e7b3630ce83bde15
MD5 51b72d4deef83c5eb4d61e350dfc428f
SHA1 cfcb34d101ba9a071fe4464e898d37a12f1775b3
SHA512 53351cfa081d1475b94424cb784f8dc3ec9e406a09189b7de07a04b199623ba5444f9c923fbd31b5ff640efac5f26d88369416282f267f9d982f93d08f3732bc
SSDEEP 49152:clOVDTtQY6SoNtaUJ67UnHpclbwbWAaJiwmcTdcoOcW+S8:jqSUHxqPFi8
MD5 SHA1 SHA512 SSDEEP

windows:5 windows x64 arch:x64

Unsigned PE

Checks for missing Authenticode signature.

Minor OS version

Major OS version

Entry point

624016

Magic Number

523

Subsystem

IMAGE_SUBSYSTEM_WINDOWS_GUI

DLL Characteristics

IMAGE_DLLCHARACTERISTICS_HIGH_ENTROPY_VA IMAGE_DLLCHARACTERISTICS_NX_COMPAT IMAGE_DLLCHARACTERISTICS_TERMINAL_SERVER_AWARE

File Characteristics

IMAGE_FILE_EXECUTABLE_IMAGE IMAGE_FILE_LARGE_ADDRESS_AWARE

PDB paths

elevation_service.exe.pdb

advapi32

AddAce CopySid CreateProcessAsUserW EventRegister EventUnregister EventWrite GetAclInformation GetLengthSid GetSecurityDescriptorControl GetSecurityDescriptorDacl GetSecurityDescriptorGroup GetSecurityDescriptorOwner GetSecurityDescriptorSacl GetSidLengthRequired GetSidSubAuthority InitializeAcl InitializeSecurityDescriptor InitializeSid IsValidSid MakeAbsoluteSD RegCloseKey RegOpenKeyExW RegQueryValueExW RegisterServiceCtrlHandlerW SetSecurityDescriptorDacl SetSecurityDescriptorGroup SetSecurityDescriptorOwner SetServiceStatus StartServiceCtrlDispatcherW SystemFunction036

kernel32

AcquireSRWLockExclusive AcquireSRWLockShared AssignProcessToJobObject CloseHandle CompareStringW CreateDirectoryW CreateEventW CreateFileW CreateProcessW CreateThread DecodePointer DeleteCriticalSection DeleteFileW DeleteProcThreadAttributeList DuplicateHandle EncodePointer EnterCriticalSection EnumSystemLocalesW ExitProcess ExitThread ExpandEnvironmentStringsW FindClose FindFirstFileExW FindNextFileW FlsAlloc FlsSetValue FlushFileBuffers FormatMessageA FreeEnvironmentStringsW FreeLibrary FreeLibraryAndExitThread GetACP GetCPInfo GetCommandLineA GetCommandLineW GetConsoleMode GetConsoleOutputCP GetCurrentDirectoryW GetCurrentProcess GetCurrentProcessId GetCurrentThread GetCurrentThreadId GetDateFormatW GetDriveTypeW GetEnvironmentStringsW GetEnvironmentVariableW GetExitCodeProcess GetFileAttributesW GetFileSizeEx GetFileType GetFullPathNameW GetLastError GetLocalTime GetLocaleInfoW GetModuleFileNameW GetModuleHandleA GetModuleHandleExW GetModuleHandleW GetNativeSystemInfo GetOEMCP GetProcAddress GetProcessHeap GetProcessId GetProductInfo GetStartupInfoW GetStdHandle GetStringTypeW GetSystemDirectoryW GetSystemInfo GetSystemTimeAsFileTime GetTempPathW GetThreadId GetThreadPriority GetTickCount GetTimeFormatW GetTimeZoneInformation GetUserDefaultLCID GetVersionExW GetWindowsDirectoryW HeapAlloc HeapDestroy HeapFree HeapReAlloc HeapSetInformation HeapSize InitOnceExecuteOnce InitializeCriticalSectionAndSpinCount InitializeCriticalSectionEx InitializeProcThreadAttributeList InitializeSListHead InitializeSRWLock IsDebuggerPresent IsProcessorFeaturePresent IsValidCodePage IsValidLocale IsWow64Process LCMapStringW LeaveCriticalSection LoadLibraryExA LoadLibraryExW LocalFree MoveFileExW MultiByteToWideChar OpenProcess OutputDebugStringA OutputDebugStringW QueryPerformanceCounter QueryPerformanceFrequency QueryThreadCycleTime RaiseException ReadConsoleW ReadFile ReleaseSRWLockExclusive ReleaseSRWLockShared RemoveDirectoryW ResetEvent RtlCaptureContext RtlCaptureStackBackTrace RtlLookupFunctionEntry RtlPcToFileHeader RtlUnwind RtlUnwindEx RtlVirtualUnwind SetEndOfFile SetEnvironmentVariableW SetEvent SetFileAttributesW SetFilePointer SetFilePointerEx SetFileTime SetHandleInformation SetLastError SetStdHandle SetThreadPriority SetUnhandledExceptionFilter Sleep SleepConditionVariableSRW SystemTimeToFileTime TerminateProcess TlsAlloc TlsFree TlsGetValue TlsSetValue TryAcquireSRWLockExclusive TzSpecificLocalTimeToSystemTime UnhandledExceptionFilter UnregisterWaitEx UpdateProcThreadAttribute VerSetConditionMask VerifyVersionInfoW VirtualAlloc VirtualFree VirtualProtect VirtualQuery WaitForSingleObject WaitForSingleObjectEx WakeAllConditionVariable WakeConditionVariable WideCharToMultiByte WriteConsoleW WriteFile lstrcmpiW

ole32

CoAddRefServerProcess CoImpersonateClient CoInitializeEx CoInitializeSecurity CoRegisterClassObject CoRegisterInitializeSpy CoReleaseServerProcess CoResumeClassObjects CoRevertToSelf CoRevokeClassObject CoRevokeInitializeSpy CoTaskMemFree CoUninitialize IIDFromString

shell32

CommandLineToArgvW SHGetFolderPathW SHGetKnownFolderPath

userenv

CreateEnvironmentBlock DestroyEnvironmentBlock

user32

AllowSetForegroundWindow

shlwapi

PathMatchSpecW

winmm

timeGetTime

Name

.text

Size

1.1MB

Virtual Size

1.1MB

Characteristics

IMAGE_SCN_CNT_CODE IMAGE_SCN_MEM_EXECUTE IMAGE_SCN_MEM_READ

Name

.rdata

Size

193KB

Virtual Size

193KB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ

Name

.data

Size

13KB

Virtual Size

48KB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ IMAGE_SCN_MEM_WRITE

Name

.pdata

Size

39KB

Virtual Size

39KB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ

Name

.00cfg

Size

512B

Virtual Size

40B

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ

Name

.retplne

Size

512B

Virtual Size

12B

Characteristics

Name

.tls

Size

512B

Virtual Size

305B

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ IMAGE_SCN_MEM_WRITE

Name

_RDATA

Size

512B

Virtual Size

148B

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ

Name

.rsrc

Size

5KB

Virtual Size

5KB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ

Name

.reloc

Size

572KB

Virtual Size

576KB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_DISCARDABLE IMAGE_SCN_MEM_EXECUTE IMAGE_SCN_MEM_READ IMAGE_SCN_MEM_WRITE

Sharing

General

Malware Config

Signatures

File Explorer

2024-04-04_51b72d4deef83c5eb4d61e350dfc428f_ryuk

advapi32

kernel32

ole32

shell32

userenv

user32

shlwapi

winmm

generic