Behavioral task
behavioral1
Sample
2024-05-08_acdca9d29179fe00647814f0300b00ce_ryuk.exe
Resource
win7-20240419-en
Behavioral task
behavioral2
Sample
2024-05-08_acdca9d29179fe00647814f0300b00ce_ryuk.exe
Resource
win10v2004-20240426-en
General
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Target
2024-05-08_acdca9d29179fe00647814f0300b00ce_ryuk
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Size
4.8MB
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MD5
acdca9d29179fe00647814f0300b00ce
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SHA1
c703bd72b788d632629c0582a8ca18b00e4d4600
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SHA256
e0add147f5ba8749b3481c8ee43a33412e04f940bf153157f7173795e76ee1a8
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SHA512
7fa053c49dab4359e6a2a9cc8a4446216ceb220bef3c89ceb3991d0e3cc131b02749e263ee1d782d135d4b1967612522c63a5cc8f55ab8d5baa2221b5d5864ba
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SSDEEP
98304:X4Le1eWkm1wCvq0kKcdm/KPtfoYHEfkBk+C/LumC3l1KXKhOfPL4oEH+LfJ3MnzS:XLdx1wCRrrYHEfXvLu71yOUUuJ3Mne
Malware Config
Signatures
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Detects Pyinstaller 1 IoCs
resource yara_rule sample pyinstaller -
Unsigned PE 1 IoCs
Checks for missing Authenticode signature.
resource 2024-05-08_acdca9d29179fe00647814f0300b00ce_ryuk
Files
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2024-05-08_acdca9d29179fe00647814f0300b00ce_ryuk.exe windows:5 windows x64 arch:x64
0822777feb8e7fd010d6791c4438bd5d
Headers
DLL Characteristics
IMAGE_DLLCHARACTERISTICS_HIGH_ENTROPY_VA
IMAGE_DLLCHARACTERISTICS_DYNAMIC_BASE
IMAGE_DLLCHARACTERISTICS_NX_COMPAT
IMAGE_DLLCHARACTERISTICS_TERMINAL_SERVER_AWARE
File Characteristics
IMAGE_FILE_EXECUTABLE_IMAGE
IMAGE_FILE_LARGE_ADDRESS_AWARE
Imports
user32
MessageBoxA
kernel32
CloseHandle
SetEndOfFile
GetLastError
SetDllDirectoryW
GetModuleFileNameW
GetProcAddress
GetCommandLineW
GetEnvironmentVariableW
SetEnvironmentVariableW
ExpandEnvironmentStringsW
GetTempPathW
WaitForSingleObject
Sleep
GetExitCodeProcess
CreateProcessW
GetStartupInfoW
LoadLibraryExW
GetShortPathNameW
FormatMessageA
LoadLibraryA
MultiByteToWideChar
WideCharToMultiByte
HeapReAlloc
HeapSize
RtlCaptureContext
RtlLookupFunctionEntry
RtlVirtualUnwind
UnhandledExceptionFilter
SetUnhandledExceptionFilter
GetCurrentProcess
TerminateProcess
IsProcessorFeaturePresent
QueryPerformanceCounter
GetCurrentProcessId
GetCurrentThreadId
GetSystemTimeAsFileTime
InitializeSListHead
IsDebuggerPresent
GetModuleHandleW
RtlUnwindEx
SetLastError
EnterCriticalSection
LeaveCriticalSection
DeleteCriticalSection
InitializeCriticalSectionAndSpinCount
TlsAlloc
TlsGetValue
TlsSetValue
TlsFree
FreeLibrary
GetCommandLineA
ReadFile
CreateFileW
GetDriveTypeW
GetFileType
RaiseException
PeekNamedPipe
SystemTimeToTzSpecificLocalTime
FileTimeToSystemTime
GetFullPathNameW
GetFullPathNameA
CreateDirectoryW
RemoveDirectoryW
FindClose
FindFirstFileExW
FindNextFileW
SetStdHandle
SetConsoleCtrlHandler
DeleteFileW
GetStdHandle
WriteFile
ExitProcess
GetModuleHandleExW
GetACP
HeapFree
HeapAlloc
GetConsoleMode
ReadConsoleW
SetFilePointerEx
GetConsoleCP
CompareStringW
LCMapStringW
GetCurrentDirectoryW
FlushFileBuffers
SetEnvironmentVariableA
GetFileAttributesExW
IsValidCodePage
GetOEMCP
GetCPInfo
GetEnvironmentStringsW
FreeEnvironmentStringsW
GetStringTypeW
GetProcessHeap
WriteConsoleW
GetTimeZoneInformation
ws2_32
ntohl
Sections
.text Size: 130KB - Virtual size: 130KB
IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ
.rdata Size: 61KB - Virtual size: 60KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
.data Size: 3KB - Virtual size: 60KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
.pdata Size: 7KB - Virtual size: 7KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
.gfids Size: 512B - Virtual size: 172B
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
.rsrc Size: 60KB - Virtual size: 60KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
.reloc Size: 2KB - Virtual size: 1KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ