2024-04-04_87f37e108bda94ea21fd85d37622e13b_ryuk

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General

Target
2024-04-04_87f37e108bda94ea21fd85d37622e13b_ryuk
Size 1.7MB
Sample240404-naplvsdh44
SHA256 01ba11e15624f60222802734e63c69629c45816e31e5e4311b8bbd90911ade25
MD5 87f37e108bda94ea21fd85d37622e13b
SHA1 0e7da782a2eb863467a347e086267fb745551779
SHA512 df29a984366d09ecd42cb4eebabe08a6613c678ebcbd52a019911777a9176660a748e658b72082107a4ccf8abcd4b57f312e6105c917c3a74d58bc357d7a6a0e
SSDEEP 24576:UgtHU0FjpVPt7AeUVIGGUZhRxHh2WVG+XN4qLqEIH7sTrvIr:UgtHUujpj7AewZdZhRdhJRd5/IbsT0
MD5 SHA1 SHA512 SSDEEP

Score

3^/10

Malware Config

Signatures

Unsigned PE 1 IoCs

Checks for missing Authenticode signature.

resource
2024-04-04_87f37e108bda94ea21fd85d37622e13b_ryuk

File Explorer

2024-04-04_87f37e108bda94ea21fd85d37622e13b_ryuk

.exe 1.7MB

2024-04-04_87f37e108bda94ea21fd85d37622e13b_ryuk

IMPHASH 6f856cb567719cbf7a1a4d8219e98c5b
SHA256 01ba11e15624f60222802734e63c69629c45816e31e5e4311b8bbd90911ade25
MD5 87f37e108bda94ea21fd85d37622e13b
SHA1 0e7da782a2eb863467a347e086267fb745551779
SHA512 df29a984366d09ecd42cb4eebabe08a6613c678ebcbd52a019911777a9176660a748e658b72082107a4ccf8abcd4b57f312e6105c917c3a74d58bc357d7a6a0e
SSDEEP 24576:UgtHU0FjpVPt7AeUVIGGUZhRxHh2WVG+XN4qLqEIH7sTrvIr:UgtHUujpj7AewZdZhRdhJRd5/IbsT0
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

513392

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

notification_helper.exe.pdb

api-ms-win-core-winrt-error-l1-1-0

RoOriginateError

advapi32

BuildExplicitAccessWithNameW BuildSecurityDescriptorW ConvertStringSecurityDescriptorToSecurityDescriptorW EventRegister EventUnregister EventWrite RegCloseKey RegOpenKeyExW RegQueryValueExW SystemFunction036

shell32

CommandLineToArgvW SHGetFolderPathW SHGetKnownFolderPath ShellExecuteExW

user32

AllowSetForegroundWindow SendInput

kernel32

AcquireSRWLockExclusive CloseHandle CompareStringW CreateDirectoryW CreateEventW CreateFileW CreateNamedPipeW CreateProcessW CreateThread DecodePointer DeleteCriticalSection DeleteFileW DuplicateHandle EncodePointer EnterCriticalSection EnumSystemLocalesW ExitProcess ExitThread ExpandEnvironmentStringsW FileTimeToSystemTime FindClose FindFirstFileExW FindNextFileW FlsAlloc FlsSetValue FlushFileBuffers FormatMessageA FreeEnvironmentStringsW FreeLibrary FreeLibraryAndExitThread GetACP GetCPInfo GetCommandLineA GetCommandLineW GetComputerNameExW GetConsoleMode GetConsoleOutputCP GetCurrentDirectoryW GetCurrentProcess GetCurrentProcessId GetCurrentThread GetCurrentThreadId GetDateFormatW GetDriveTypeW GetEnvironmentStringsW GetEnvironmentVariableW GetFileAttributesW GetFileInformationByHandle GetFileSizeEx GetFileTime GetFileType GetFullPathNameW GetLastError GetLocalTime GetLocaleInfoW GetLongPathNameW GetModuleFileNameW GetModuleHandleA GetModuleHandleExW GetModuleHandleW GetNativeSystemInfo GetOEMCP GetProcAddress GetProcessHeap GetProcessId GetProcessTimes GetProductInfo GetStartupInfoW GetStdHandle GetStringTypeW GetSystemDirectoryW GetSystemInfo GetSystemTimeAsFileTime GetTempPathW GetThreadId GetThreadPriority GetTickCount GetTimeFormatW GetTimeZoneInformation GetUserDefaultLCID GetUserDefaultLangID GetVersion GetVersionExW GetWindowsDirectoryW HeapSetInformation InitOnceExecuteOnce InitializeCriticalSection InitializeCriticalSectionAndSpinCount InitializeSListHead IsDebuggerPresent IsProcessorFeaturePresent IsValidCodePage IsValidLocale IsWow64Process K32QueryWorkingSetEx LCMapStringW LeaveCriticalSection LoadLibraryExA LoadLibraryExW LoadLibraryW LocalFree LockFileEx MoveFileW MultiByteToWideChar OpenProcess OutputDebugStringA OutputDebugStringW PeekNamedPipe QueryPerformanceCounter QueryPerformanceFrequency QueryThreadCycleTime RaiseException ReadConsoleW ReadFile ReleaseSRWLockExclusive RemoveDirectoryW ReplaceFileW ResetEvent RtlCaptureContext RtlCaptureStackBackTrace RtlLookupFunctionEntry RtlPcToFileHeader RtlUnwind RtlUnwindEx RtlVirtualUnwind SetConsoleCtrlHandler SetEndOfFile SetEnvironmentVariableW SetEvent SetFileAttributesW SetFileInformationByHandle SetFilePointerEx SetLastError SetNamedPipeHandleState SetStdHandle SetThreadPriority SetUnhandledExceptionFilter Sleep SleepConditionVariableSRW SleepEx SystemTimeToTzSpecificLocalTime TerminateProcess TlsAlloc TlsFree TlsGetValue TlsSetValue TransactNamedPipe TryAcquireSRWLockExclusive UnhandledExceptionFilter UnlockFileEx UnmapViewOfFile UnregisterWaitEx VerSetConditionMask VerifyVersionInfoW VirtualAlloc VirtualFree VirtualProtect VirtualQuery WaitForSingleObject WaitForSingleObjectEx WaitNamedPipeW WakeAllConditionVariable WakeConditionVariable WideCharToMultiByte WriteConsoleW WriteFile lstrcmpW lstrcmpiW

ole32

CoAddRefServerProcess CoInitializeEx CoRegisterClassObject CoRegisterInitializeSpy CoReleaseServerProcess CoResumeClassObjects CoRevokeClassObject CoRevokeInitializeSpy CoTaskMemFree CoUninitialize

version

GetFileVersionInfoSizeW GetFileVersionInfoW VerQueryValueW

winmm

timeGetTime

shlwapi

PathMatchSpecW

Name

.text

Size

903KB

Virtual Size

903KB

Characteristics

IMAGE_SCN_CNT_CODE IMAGE_SCN_MEM_EXECUTE IMAGE_SCN_MEM_READ

Name

.rdata

Size

171KB

Virtual Size

170KB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ

Name

.data

Size

14KB

Virtual Size

49KB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ IMAGE_SCN_MEM_WRITE

Name

.pdata

Size

34KB

Virtual Size

34KB

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

.tls

Size

512B

Virtual Size

289B

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ IMAGE_SCN_MEM_WRITE

Name

CPADinfo

Size

512B

Virtual Size

56B

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

2KB

Virtual Size

2KB

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_87f37e108bda94ea21fd85d37622e13b_ryuk

api-ms-win-core-winrt-error-l1-1-0

advapi32

shell32

user32

kernel32

ole32

version

winmm

shlwapi

generic