2024-04-07_c4ad019445b0a9687c6a616b23bd4ed4_ryuk

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General

Target
2024-04-07_c4ad019445b0a9687c6a616b23bd4ed4_ryuk
Size 5.5MB
Sample240407-w2lnaabc58
SHA256 d81f6def2387f78b5556ea5ef3a2ad41e36887ed6e17a80b9d49b1b10aec4159
MD5 c4ad019445b0a9687c6a616b23bd4ed4
SHA1 5d15d4985c80b8089da602a115cace4df58b42cf
SHA512 de8da753dd4bc210f57759210053e0123766bd31a353eb98d054453d0f2a87193ac465c614b6d241e3f27adf1f637bd413905db75652dbaebcbb60c2ef61417e
SSDEEP 49152:lEFbqzA/PvIGDFr9AtwA3PlpIgong0yTI+q47W1Ln9tJEUxDG0BYYrLA50IHLGfc:5AI5pAdVJn9tbnR1VgBVm9j2jF
MD5 SHA1 SHA512 SSDEEP

Score

3^/10

Malware Config

Signatures

Unsigned PE 1 IoCs

Checks for missing Authenticode signature.

resource
2024-04-07_c4ad019445b0a9687c6a616b23bd4ed4_ryuk

File Explorer

2024-04-07_c4ad019445b0a9687c6a616b23bd4ed4_ryuk

.exe 5.5MB

2024-04-07_c4ad019445b0a9687c6a616b23bd4ed4_ryuk

IMPHASH ec53853f09f849c6ff4e957a4faaa766
SHA256 d81f6def2387f78b5556ea5ef3a2ad41e36887ed6e17a80b9d49b1b10aec4159
MD5 c4ad019445b0a9687c6a616b23bd4ed4
SHA1 5d15d4985c80b8089da602a115cace4df58b42cf
SHA512 de8da753dd4bc210f57759210053e0123766bd31a353eb98d054453d0f2a87193ac465c614b6d241e3f27adf1f637bd413905db75652dbaebcbb60c2ef61417e
SSDEEP 49152:lEFbqzA/PvIGDFr9AtwA3PlpIgong0yTI+q47W1Ln9tJEUxDG0BYYrLA50IHLGfc:5AI5pAdVJn9tbnR1VgBVm9j2jF
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

2441376

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

C:\b\s\w\ir\cache\builder\src\out\Release_x64\setup.exe.pdb

advapi32

AdjustTokenPrivileges BuildExplicitAccessWithNameW BuildSecurityDescriptorW BuildTrusteeWithSidW ChangeServiceConfigW CloseServiceHandle ConvertSidToStringSidW ConvertStringSecurityDescriptorToSecurityDescriptorW ConvertStringSidToSidW CreateProcessAsUserW CreateServiceW DeleteService DeregisterEventSource DuplicateTokenEx EventRegister EventSetInformation EventUnregister EventWrite GetLengthSid GetNamedSecurityInfoW GetSecurityDescriptorControl GetSecurityDescriptorDacl GetSecurityDescriptorGroup GetSecurityDescriptorOwner GetSecurityDescriptorSacl GetSidSubAuthority GetSidSubAuthorityCount GetTokenInformation GetTraceEnableFlags GetTraceEnableLevel GetTraceLoggerHandle GetUserNameW ImpersonateNamedPipeClient IsValidAcl IsValidSecurityDescriptor IsValidSid LookupPrivilegeValueW OpenProcessToken OpenSCManagerW OpenServiceW QueryServiceConfigW RegCloseKey RegCreateKeyExW RegDeleteKeyExW RegDeleteValueW RegEnumKeyExW RegEnumValueA RegEnumValueW RegLoadKeyW RegOpenKeyExW RegQueryInfoKeyW RegQueryValueExA RegQueryValueExW RegSetValueExW RegUnLoadKeyW RegisterEventSourceA RegisterTraceGuidsW ReportEventA RevertToSelf SetEntriesInAclW SetNamedSecurityInfoW SetSecurityInfo SystemFunction036 TraceEvent UnregisterTraceGuids

dbghelp

SymCleanup SymFromAddr SymGetLineFromAddr64 SymGetSearchPathW SymInitialize SymSetOptions SymSetSearchPathW

shell32

CommandLineToArgvW ord190 ord155 ord680 SHChangeNotify SHGetFolderPathW SHGetKnownFolderPath SHQueryUserNotificationState ShellExecuteExW ShellExecuteW

user32

AllowSetForegroundWindow CallNextHookEx CharUpperW CreateWindowExW DefWindowProcW DestroyWindow DispatchMessageW EqualRect GetActiveWindow GetForegroundWindow GetMessageW GetMonitorInfoW GetQueueStatus GetSystemMetrics GetWindowLongPtrW GetWindowLongW GetWindowRect GetWindowThreadProcessId IntersectRect KillTimer LoadIconW MessageBoxW MonitorFromRect MonitorFromWindow MoveWindow MsgWaitForMultipleObjectsEx PeekMessageW PostMessageW PostQuitMessage RegisterClassExW RegisterClassW SendMessageW SetForegroundWindow SetTimer SetWindowLongPtrW SetWindowsHookExW TranslateMessage UnhookWindowsHookEx UnregisterClassW

ws2_32

ntohl

kernel32

AcquireSRWLockExclusive AcquireSRWLockShared AssignProcessToJobObject AttachConsole CancelIo CloseHandle CompareStringW ConnectNamedPipe CopyFileW CreateDirectoryW CreateEventW CreateFileA CreateFileMappingW CreateFileW CreateIoCompletionPort CreateMutexW CreateNamedPipeW CreateProcessW CreateSemaphoreW CreateThread CreateToolhelp32Snapshot DecodePointer DeleteCriticalSection DeleteFileW DeleteProcThreadAttributeList DisconnectNamedPipe DuplicateHandle EncodePointer EnterCriticalSection EnumSystemLocalesW ExitProcess ExitThread ExpandEnvironmentStringsW FileTimeToSystemTime FindClose FindFirstFileExW FindNextFileW FindResourceW FlsAlloc FlsFree FlsGetValue FlsSetValue FlushFileBuffers FlushViewOfFile FormatMessageA FreeConsole FreeEnvironmentStringsW FreeLibrary FreeLibraryAndExitThread GetACP GetCPInfo GetCommandLineA GetCommandLineW GetConsoleDisplayMode GetConsoleMode GetConsoleOutputCP GetCurrentDirectoryW GetCurrentProcess GetCurrentProcessId GetCurrentThread GetCurrentThreadId GetDateFormatW GetDriveTypeW GetEnvironmentStringsW GetEnvironmentVariableW GetExitCodeProcess GetFileAttributesExW GetFileAttributesW GetFileInformationByHandle GetFileInformationByHandleEx GetFileSizeEx GetFileTime GetFileType GetFullPathNameW GetLastError GetLocalTime GetLocaleInfoW GetLogicalProcessorInformation GetLongPathNameW GetModuleFileNameW GetModuleHandleA GetModuleHandleExW GetModuleHandleW GetNativeSystemInfo GetOEMCP GetPriorityClass GetProcAddress GetProcessHandleCount GetProcessHeap GetProcessId GetProcessIoCounters GetProcessMitigationPolicy GetProcessTimes GetProductInfo GetQueuedCompletionStatus GetShortPathNameW GetStartupInfoW GetStdHandle GetStringTypeW GetSystemDefaultLCID GetSystemDirectoryW GetSystemInfo GetSystemTimeAsFileTime GetTempPathW GetThreadContext GetThreadId GetThreadLocale GetThreadPreferredUILanguages GetThreadPriority GetTickCount GetTimeFormatW GetTimeZoneInformation GetUserDefaultLCID GetUserDefaultLangID GetVersionExW GetWindowsDirectoryW GlobalAlloc GlobalFree HeapAlloc HeapDestroy HeapFree HeapReAlloc HeapSetInformation HeapSize InitOnceExecuteOnce InitializeConditionVariable InitializeCriticalSection InitializeCriticalSectionAndSpinCount InitializeCriticalSectionEx InitializeProcThreadAttributeList InitializeSListHead InitializeSRWLock IsDebuggerPresent IsProcessorFeaturePresent IsValidCodePage IsValidLocale IsWow64Process K32GetModuleInformation K32GetPerformanceInfo K32GetProcessMemoryInfo K32QueryWorkingSetEx LCMapStringW LeaveCriticalSection LoadLibraryExA LoadLibraryExW LoadLibraryW LoadResource LocalFree LockFileEx LockResource MapViewOfFile MoveFileExW MoveFileW MultiByteToWideChar OpenMutexW OpenProcess OutputDebugStringA OutputDebugStringW PeekNamedPipe PostQueuedCompletionStatus Process32FirstW Process32NextW QueryFullProcessImageNameW QueryPerformanceCounter QueryPerformanceFrequency QueryThreadCycleTime QueueUserAPC RaiseException ReadConsoleW ReadFile ReadProcessMemory RegisterWaitForSingleObject ReleaseMutex ReleaseSRWLockExclusive ReleaseSRWLockShared ReleaseSemaphore RemoveDirectoryW ReplaceFileW ResetEvent ResumeThread RtlCaptureContext RtlCaptureStackBackTrace RtlLookupFunctionEntry RtlPcToFileHeader RtlUnwind RtlUnwindEx RtlVirtualUnwind SetConsoleCtrlHandler SetCurrentDirectoryW SetEndOfFile SetEnvironmentVariableW SetEvent SetFileAttributesW SetFileInformationByHandle SetFilePointerEx SetFileTime SetHandleInformation SetLastError SetNamedPipeHandleState SetPriorityClass SetProcessShutdownParameters SetStdHandle SetThreadPriority SetUnhandledExceptionFilter SizeofResource Sleep SleepConditionVariableSRW SleepEx SuspendThread SwitchToThread SystemTimeToTzSpecificLocalTime TerminateProcess TlsAlloc TlsFree TlsGetValue TlsSetValue TransactNamedPipe TryAcquireSRWLockExclusive UnhandledExceptionFilter UnlockFileEx UnmapViewOfFile UnregisterWaitEx UpdateProcThreadAttribute VerSetConditionMask VerifyVersionInfoW VirtualAlloc VirtualAllocEx VirtualFree VirtualProtect VirtualQuery VirtualQueryEx WTSGetActiveConsoleSessionId WaitForMultipleObjects WaitForSingleObject WaitForSingleObjectEx WaitNamedPipeW WakeAllConditionVariable WakeConditionVariable WerRegisterRuntimeExceptionModule WideCharToMultiByte Wow64GetThreadContext WriteConsoleW WriteFile WriteProcessMemory lstrcmpiW lstrlenA

winhttp

WinHttpAddRequestHeaders WinHttpCloseHandle WinHttpConnect WinHttpCrackUrl WinHttpGetProxyForUrl WinHttpOpen WinHttpOpenRequest WinHttpQueryHeaders WinHttpReadData WinHttpReceiveResponse WinHttpSendRequest WinHttpSetOption WinHttpSetStatusCallback WinHttpSetTimeouts WinHttpWriteData

netapi32

NetApiBufferFree NetGetJoinInformation

wtsapi32

WTSFreeMemory WTSQuerySessionInformationW WTSQueryUserToken

ole32

CoAllowSetForegroundWindow CoCreateInstance CoInitializeEx CoRegisterInitializeSpy CoRevokeInitializeSpy CoSetProxyBlanket CoTaskMemAlloc CoTaskMemFree CoUninitialize PropVariantClear

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

RoGetActivationFactory

propsys

InitPropVariantFromCLSID

shlwapi

ord437 PathMatchSpecW UrlCanonicalizeW

winmm

timeBeginPeriod timeEndPeriod timeGetTime

userenv

CreateEnvironmentBlock DestroyEnvironmentBlock

version

GetFileVersionInfoSizeW GetFileVersionInfoW VerQueryValueW

urlmon

CreateURLMonikerEx

oleaut32

SysAllocString SysAllocStringLen SysFreeString SysStringLen VariantClear VariantInit

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

WindowsCreateString WindowsDeleteString

ntdll

NtClose NtOpenKeyEx NtQueryValueKey RtlFormatCurrentUserKeyPath RtlFreeUnicodeString RtlInitUnicodeString

ncrypt

NCryptCreatePersistedKey NCryptExportKey NCryptFinalizeKey NCryptFreeObject NCryptGetProperty NCryptImportKey NCryptIsAlgSupported NCryptOpenStorageProvider NCryptSignHash

Name

.text

Size

3.6MB

Virtual Size

3.6MB

Characteristics

IMAGE_SCN_CNT_CODE IMAGE_SCN_MEM_EXECUTE IMAGE_SCN_MEM_READ

Name

.rdata

Size

670KB

Virtual Size

669KB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ

Name

.data

Size

74KB

Virtual Size

143KB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ IMAGE_SCN_MEM_WRITE

Name

.pdata

Size

104KB

Virtual Size

104KB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ

Name

.00cfg

Size

512B

Virtual Size

48B

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ

Name

.gxfg

Size

13KB

Virtual Size

12KB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ

Name

.retplne

Size

512B

Virtual Size

204B

Characteristics

Name

.rodata

Size

2KB

Virtual Size

2KB

Characteristics

IMAGE_SCN_CNT_CODE IMAGE_SCN_MEM_EXECUTE IMAGE_SCN_MEM_READ

Name

.tls

Size

1024B

Virtual Size

585B

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

LZMADEC

Size

4KB

Virtual Size

4KB

Characteristics

IMAGE_SCN_CNT_CODE IMAGE_SCN_MEM_EXECUTE IMAGE_SCN_MEM_READ

Name

_RDATA

Size

512B

Virtual Size

348B

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ

Name

malloc_h

Size

1KB

Virtual Size

1KB

Characteristics

IMAGE_SCN_CNT_CODE IMAGE_SCN_MEM_EXECUTE IMAGE_SCN_MEM_READ

Name

.rsrc

Size

431KB

Virtual Size

430KB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ

Name

.reloc

Size

580KB

Virtual Size

584KB

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

2024-04-07_c4ad019445b0a9687c6a616b23bd4ed4_ryuk

advapi32

dbghelp

shell32

user32

ws2_32

kernel32

winhttp

netapi32

wtsapi32

ole32

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

propsys

shlwapi

winmm

userenv

version

urlmon

oleaut32

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

ntdll

ncrypt

generic