Static task
static1
Behavioral task
behavioral1
Sample
2024-06-25_b50c49fde3f933f83b730565536d4c73_ryuk.exe
Resource
win7-20231129-en
Behavioral task
behavioral2
Sample
2024-06-25_b50c49fde3f933f83b730565536d4c73_ryuk.exe
Resource
win10v2004-20240508-en
General
-
Target
2024-06-25_b50c49fde3f933f83b730565536d4c73_ryuk
-
Size
4.9MB
-
MD5
b50c49fde3f933f83b730565536d4c73
-
SHA1
65644e33a8c12500d6eb35cc8b70df1c0cc1a98a
-
SHA256
7780c3adfe484da80a0ab8103fb8d8ac6f5040a3544e3fab81ae7cb49d281d9b
-
SHA512
dd43b1f0186e61302fe324793395d00560340c5f439d175c9d0590cfd4b84226106f6085152e5c155d198f2bb3217bdcd6b7e26b81002f31fa39de3f8ce937ea
-
SSDEEP
49152:N2lyVoHy+bDfGubrgMLNG1/vkFpDoNClGdx0kksS3B4T3XzPgn6B3drflLqcVJ84:3n8gH/vkFKGkkW3drd24SRaEGc7
Malware Config
Signatures
-
Unsigned PE 1 IoCs
Checks for missing Authenticode signature.
resource 2024-06-25_b50c49fde3f933f83b730565536d4c73_ryuk
Files
-
2024-06-25_b50c49fde3f933f83b730565536d4c73_ryuk.exe windows:6 windows x64 arch:x64
bfbef75395a7025a0475afdb1e2969c4
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
ws2_32
WSAGetLastError
WSACleanup
WSAStartup
socket
send
recv
listen
inet_addr
htons
closesocket
bind
accept
htonl
kernel32
HeapSize
FreeEnvironmentStringsW
GetEnvironmentStringsW
GetOEMCP
IsValidCodePage
FindNextFileA
FindFirstFileExA
GetProcessHeap
WriteConsoleW
FindClose
GetDiskFreeSpaceExW
GetFileAttributesExW
GetFullPathNameW
GetLastError
Sleep
LocalFree
FormatMessageA
GetCurrentProcess
GlobalMemoryStatusEx
K32GetProcessMemoryInfo
GetComputerNameA
GetSystemTimeAsFileTime
GetFileInformationByHandle
SetEndOfFile
SetFilePointer
CreateFileA
CreateFileW
GetFileSize
CloseHandle
SetLastError
MapViewOfFileEx
UnmapViewOfFile
GetModuleHandleA
GetProcAddress
CreateFileMappingA
EnterCriticalSection
LeaveCriticalSection
TryEnterCriticalSection
DeleteCriticalSection
GetCurrentThreadId
WideCharToMultiByte
QueryPerformanceCounter
MultiByteToWideChar
GetStringTypeW
RtlPcToFileHeader
EncodePointer
DecodePointer
RaiseException
DuplicateHandle
WaitForSingleObjectEx
GetCurrentThread
GetExitCodeThread
QueueUserWorkItem
IsProcessorFeaturePresent
InitializeCriticalSectionAndSpinCount
CreateEventW
TlsAlloc
TlsGetValue
TlsSetValue
TlsFree
GetTickCount
GetModuleHandleW
CompareStringW
LCMapStringW
GetLocaleInfoW
GetCPInfo
SetEvent
ResetEvent
InitializeSListHead
RtlCaptureContext
RtlLookupFunctionEntry
RtlVirtualUnwind
UnhandledExceptionFilter
SetUnhandledExceptionFilter
TerminateProcess
IsDebuggerPresent
GetStartupInfoW
GetCurrentProcessId
CreateTimerQueue
SignalObjectAndWait
SwitchToThread
CreateThread
SetThreadPriority
GetThreadPriority
GetLogicalProcessorInformation
CreateTimerQueueTimer
ChangeTimerQueueTimer
DeleteTimerQueueTimer
GetNumaHighestNodeNumber
GetProcessAffinityMask
SetThreadAffinityMask
RegisterWaitForSingleObject
UnregisterWait
GetThreadTimes
FreeLibrary
FreeLibraryAndExitThread
GetModuleFileNameW
LoadLibraryExW
GetVersionExW
VirtualAlloc
VirtualFree
VirtualProtect
ReleaseSemaphore
InterlockedPopEntrySList
InterlockedPushEntrySList
InterlockedFlushSList
QueryDepthSList
UnregisterWaitEx
LoadLibraryW
RtlUnwindEx
ExitProcess
GetModuleHandleExW
CreateDirectoryW
DeleteFileW
GetFileType
ReadFile
GetDriveTypeW
GetFullPathNameA
SetEnvironmentVariableA
GetCurrentDirectoryW
GetTimeZoneInformation
PeekNamedPipe
SystemTimeToTzSpecificLocalTime
FileTimeToSystemTime
SetStdHandle
GetConsoleMode
ReadConsoleW
WriteFile
GetConsoleCP
SetFilePointerEx
HeapAlloc
HeapFree
ExitThread
HeapReAlloc
GetModuleFileNameA
GetStdHandle
GetCommandLineA
GetCommandLineW
GetACP
GetDateFormatW
GetTimeFormatW
IsValidLocale
GetUserDefaultLCID
EnumSystemLocalesW
FlushFileBuffers
Sections
.text Size: 3.8MB - Virtual size: 3.8MB
IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ
.rdata Size: 845KB - Virtual size: 844KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
.data Size: 40KB - Virtual size: 179KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
.pdata Size: 203KB - Virtual size: 203KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
.gfids Size: 3KB - Virtual size: 2KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
.tls Size: 512B - Virtual size: 9B
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
_RDATA Size: 512B - Virtual size: 32B
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
.rsrc Size: 512B - Virtual size: 480B
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
.reloc Size: 20KB - Virtual size: 19KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ