2024-04-04_7c5fc8f35052dc4cd64cd3d071237cfb_ryuk

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General

Target
2024-04-04_7c5fc8f35052dc4cd64cd3d071237cfb_ryuk
Size 1.7MB
Sample240404-m7qpradb7v
SHA256 8b578265fddf43b23b8e6f6d091ffb6ac38a903eea43a7fdb8354d2818e98e81
MD5 7c5fc8f35052dc4cd64cd3d071237cfb
SHA1 dd27b04954946f5243e7c67e038af24d647c4f89
SHA512 24ddc23f5d173c089bd420e8e58554bcbe1ec0699f9fdb24ddf8da33243b19db1b997ba078748198f05e39ae218ee6d30d15583c27885ec5cf0b08b404229507
SSDEEP 12288:LsixPwETnuX2VhSJHD9MC/g0ykIPNuenh+ogtuw0P8JBvn7gsIjkv66XsdA:LZFwWuGXoX/By/P0e0ZRCGvn7gsIjN2
MD5 SHA1 SHA512 SSDEEP

Score

3^/10

Malware Config

Signatures

Unsigned PE 1 IoCs

Checks for missing Authenticode signature.

resource
2024-04-04_7c5fc8f35052dc4cd64cd3d071237cfb_ryuk

File Explorer

2024-04-04_7c5fc8f35052dc4cd64cd3d071237cfb_ryuk

.exe 1.7MB

2024-04-04_7c5fc8f35052dc4cd64cd3d071237cfb_ryuk

IMPHASH 1bba9348e5de4a3a0ecedee03cd7f678
SHA256 8b578265fddf43b23b8e6f6d091ffb6ac38a903eea43a7fdb8354d2818e98e81
MD5 7c5fc8f35052dc4cd64cd3d071237cfb
SHA1 dd27b04954946f5243e7c67e038af24d647c4f89
SHA512 24ddc23f5d173c089bd420e8e58554bcbe1ec0699f9fdb24ddf8da33243b19db1b997ba078748198f05e39ae218ee6d30d15583c27885ec5cf0b08b404229507
SSDEEP 12288:LsixPwETnuX2VhSJHD9MC/g0ykIPNuenh+ogtuw0P8JBvn7gsIjkv66XsdA:LZFwWuGXoX/By/P0e0ZRCGvn7gsIjN2
MD5 SHA1 SHA512 SSDEEP

windows:10 windows x64 arch:x64

Unsigned PE

Checks for missing Authenticode signature.

Minor OS version

Major OS version

Entry point

45424

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

rpcrt4

RpcStringFreeW UuidCreate UuidToStringW

shell32

SHGetKnownFolderPath

ole32

CoTaskMemFree

crypt32

CertCloseStore CertFindCertificateInStore CertFreeCertificateContext CertGetNameStringA CertGetNameStringW CryptMsgClose CryptMsgGetParam CryptQueryObject

wintrust

WinVerifyTrust

kernel32

CloseHandle CompareStringW CopyFileW CreateDirectoryW CreateEventW CreateFileW CreateProcessW CreateThread CreateToolhelp32Snapshot DeleteCriticalSection DeleteFileW DeviceIoControl EnterCriticalSection ExitProcess FindClose FindFirstFileExW FindNextFileW FlushFileBuffers FreeEnvironmentStringsW FreeLibrary GetACP GetCPInfo GetCommandLineA GetCommandLineW GetConsoleMode GetConsoleOutputCP GetCurrentProcess GetCurrentProcessId GetCurrentThreadId GetDateFormatW GetDriveTypeW GetEnvironmentStringsW GetExitCodeProcess GetFileAttributesW GetFileSize GetFileSizeEx GetFileType GetFullPathNameW GetLastError GetLongPathNameW GetModuleFileNameW GetModuleHandleExW GetModuleHandleW GetOEMCP GetProcAddress GetProcessHeap GetStartupInfoW GetStdHandle GetStringTypeW GetSystemTimeAsFileTime GetTimeFormatW GetTimeZoneInformation 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

148KB

Virtual Size

148KB

Characteristics

IMAGE_SCN_CNT_CODE IMAGE_SCN_MEM_EXECUTE IMAGE_SCN_MEM_READ

Name

.rdata

Size

58KB

Virtual Size

57KB

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

40B

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

.voltbl

Size

512B

Virtual Size

42B

Characteristics

Name

_RDATA

Size

512B

Virtual Size

252B

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ

Name

.rsrc

Size

2KB

Virtual Size

1KB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ

Name

.reloc

Size

1.5MB

Virtual Size

1.5MB

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_7c5fc8f35052dc4cd64cd3d071237cfb_ryuk

advapi32

shlwapi

user32

version

rpcrt4

shell32

ole32

crypt32

wintrust

kernel32

generic