2024-04-25_c75ca0b9a0f0ce3042f5f15e71209bcd_ryuk

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General

Target
2024-04-25_c75ca0b9a0f0ce3042f5f15e71209bcd_ryuk
Size 1.4MB
Sample240425-szz64scb47
SHA256 ada59df4b6497eaf5365945cc6ec4fc0a8bcaf0ddbcc43c4a4ba7d02e07cebf7
MD5 c75ca0b9a0f0ce3042f5f15e71209bcd
SHA1 aaf73910312dd55a5c1fc84945c291b6d245f188
SHA512 bea0272005d7ceaec5fd94fcbbc97c97c47f749f20821377a57f2e246f0a57ca250e098239fbbf9cb79bbaaa92414a438c652680e80500e2b306e3d3c6b5cbcd
SSDEEP 24576:TPsJcuiT+L6VMRCPU6CENltmVVdpx7fLrQWd:Twcuf6ZU6CENlc7dpJLrQWd
MD5 SHA1 SHA512 SSDEEP

Score

3^/10

Malware Config

Signatures

Unsigned PE 1 IoCs

Checks for missing Authenticode signature.

resource
2024-04-25_c75ca0b9a0f0ce3042f5f15e71209bcd_ryuk

File Explorer

2024-04-25_c75ca0b9a0f0ce3042f5f15e71209bcd_ryuk

.exe 1.4MB

2024-04-25_c75ca0b9a0f0ce3042f5f15e71209bcd_ryuk

IMPHASH 1a43a4990502ce08969e24eef5b26241
SHA256 ada59df4b6497eaf5365945cc6ec4fc0a8bcaf0ddbcc43c4a4ba7d02e07cebf7
MD5 c75ca0b9a0f0ce3042f5f15e71209bcd
SHA1 aaf73910312dd55a5c1fc84945c291b6d245f188
SHA512 bea0272005d7ceaec5fd94fcbbc97c97c47f749f20821377a57f2e246f0a57ca250e098239fbbf9cb79bbaaa92414a438c652680e80500e2b306e3d3c6b5cbcd
SSDEEP 24576:TPsJcuiT+L6VMRCPU6CENltmVVdpx7fLrQWd:Twcuf6ZU6CENlc7dpJLrQWd
MD5 SHA1 SHA512 SSDEEP

Unsigned PE

Checks for missing Authenticode signature.

Minor OS version

Major OS version

Entry point

48976

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

maintenanceservice.pdb

advapi32

AdjustTokenPrivileges ChangeServiceConfig2W ChangeServiceConfigW CloseServiceHandle ControlService CreateServiceW CreateWellKnownSid CryptAcquireContextA CryptCreateHash CryptDestroyHash CryptGetHashParam CryptHashData CryptReleaseContext DeleteService FreeSid GetSecurityDescriptorDacl InitializeSecurityDescriptor LookupPrivilegeValueA OpenProcessToken OpenSCManagerA OpenSCManagerW OpenServiceW QueryServiceConfigW QueryServiceObjectSecurity QueryServiceStatus QueryServiceStatusEx RegCloseKey RegEnumKeyExW RegGetValueW RegOpenKeyExW RegQueryInfoKeyW RegQueryValueExW RegSetValueExW RegisterServiceCtrlHandlerW SetEntriesInAclW SetSecurityDescriptorDacl SetServiceObjectSecurity SetServiceStatus StartServiceCtrlDispatcherW

shlwapi

PathAppendW PathCanonicalizeW PathIsUNCServerShareW PathQuoteSpacesW PathRemoveFileSpecW PathStripPathW PathStripToRootW PathUnquoteSpacesW

user32

LoadStringA wsprintfW

version

GetFileVersionInfoSizeW GetFileVersionInfoW VerQueryValueW

shell32

SHGetKnownFolderPath

ole32

CoTaskMemFree

rpcrt4

RpcStringFreeW UuidCreate UuidToStringW

crypt32

CertCloseStore CertFindCertificateInStore CertFreeCertificateContext CertGetNameStringA CertGetNameStringW CryptMsgClose CryptMsgGetParam CryptQueryObject

wintrust

WinVerifyTrust

kernel32

CloseHandle CompareStringW CopyFileW CreateDirectoryW CreateEventW CreateFileW CreateProcessW CreateThread CreateToolhelp32Snapshot DeleteCriticalSection DeleteFileW DeviceIoControl EncodePointer EnterCriticalSection ExitProcess FindClose FindFirstFileExW FindNextFileW FlushFileBuffers FreeEnvironmentStringsW FreeLibrary GetACP GetCPInfo GetCommandLineA GetCommandLineW GetConsoleCP GetConsoleMode GetCurrentProcess GetCurrentProcessId GetCurrentThreadId GetDriveTypeW GetEnvironmentStringsW GetExitCodeProcess GetFileAttributesW GetFileSize GetFileType GetFullPathNameW GetLastError GetLongPathNameW GetModuleFileNameW GetModuleHandleExW GetModuleHandleW GetOEMCP GetProcAddress GetProcessHeap GetStartupInfoW GetStdHandle GetStringTypeW GetSystemTimeAsFileTime HeapAlloc HeapFree HeapReAlloc HeapSize InitializeCriticalSectionAndSpinCount InitializeSListHead IsDebuggerPresent IsProcessorFeaturePresent IsValidCodePage LCMapStringW LeaveCriticalSection LoadLibraryExW LocalAlloc LocalFree MoveFileExW MultiByteToWideChar Process32FirstW Process32NextW QueryPerformanceCounter RaiseException ReadConsoleW ReadFile ResetEvent RtlCaptureContext RtlLookupFunctionEntry RtlPcToFileHeader RtlUnwind RtlUnwindEx RtlVirtualUnwind SetEndOfFile SetEnvironmentVariableW SetEvent SetFilePointerEx SetLastError SetStdHandle SetUnhandledExceptionFilter Sleep TerminateProcess TlsAlloc TlsFree TlsGetValue TlsSetValue UnhandledExceptionFilter WaitForSingleObject WaitForSingleObjectEx WideCharToMultiByte WriteConsoleW WriteFile lstrcmpiW

Name

.text

Size

143KB

Virtual Size

143KB

Characteristics

IMAGE_SCN_CNT_CODE IMAGE_SCN_MEM_EXECUTE IMAGE_SCN_MEM_READ

Name

.rdata

Size

56KB

Virtual Size

55KB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ

Name

.data

Size

3KB

Virtual Size

8KB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ IMAGE_SCN_MEM_WRITE

Name

.pdata

Size

6KB

Virtual Size

6KB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ

Name

.00cfg

Size

512B

Virtual Size

16B

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ

Name

.tls

Size

512B

Virtual Size

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ IMAGE_SCN_MEM_WRITE

Name

.rsrc

Size

2KB

Virtual Size

1KB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ

Name

.reloc

Size

1.2MB

Virtual Size

1.8MB

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

2024-04-25_c75ca0b9a0f0ce3042f5f15e71209bcd_ryuk

advapi32

shlwapi

user32

version

shell32

ole32

rpcrt4

crypt32

wintrust

kernel32

generic