Static task
static1
Behavioral task
behavioral1
Sample
2024-01-09_bfff64009f902492e09f5947d9525d65_ryuk.exe
Resource
win7-20231215-en
Behavioral task
behavioral2
Sample
2024-01-09_bfff64009f902492e09f5947d9525d65_ryuk.exe
Resource
win10v2004-20231215-en
General
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Target
2024-01-09_bfff64009f902492e09f5947d9525d65_ryuk
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Size
2.1MB
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MD5
bfff64009f902492e09f5947d9525d65
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SHA1
a9e30f2a188b34ffa7afc4494ea2d7167ec4947c
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SHA256
d57701cb22a3581b7ed79845da1bf23b771846d77a0685979fda74cecd24db55
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SHA512
a37a1487929db4ce4cd0e86cac6289e8fde83625d2c560ab81bcf86a920344eb3aec44cf1a8a2794cfeccc8e41f465bdd20c65212a4bdab61690d09683212b83
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SSDEEP
12288:V1KagbdkOqTtTbNQlUbR31Okj0PbNwhNJP2IOIKXz9RBghZugGmukxqJzQBFf4aC:V1IYpTbNQ8l1OkjvP2DXJRBtQBhzZA
Malware Config
Signatures
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Unsigned PE 1 IoCs
Checks for missing Authenticode signature.
resource 2024-01-09_bfff64009f902492e09f5947d9525d65_ryuk
Files
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2024-01-09_bfff64009f902492e09f5947d9525d65_ryuk.exe windows:6 windows x64 arch:x64
091f00f66895fad3d3cb91329efddd23
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
kernel32
ReadFile
WriteFile
CloseHandle
GetLastError
PostQueuedCompletionStatus
CreateEventW
Sleep
HeapCreate
HeapDestroy
HeapAlloc
HeapReAlloc
HeapFree
CreateIoCompletionPort
SetEvent
ResetEvent
InitializeConditionVariable
WakeConditionVariable
WakeAllConditionVariable
SleepConditionVariableCS
EnterCriticalSection
LeaveCriticalSection
InitializeCriticalSectionAndSpinCount
TryEnterCriticalSection
DeleteCriticalSection
SwitchToFiber
DeleteFiber
ConvertFiberToThread
ConvertThreadToFiber
GetQueuedCompletionStatus
CreateFileW
ReadConsoleW
SetStdHandle
FindNextFileW
FindFirstFileExW
FindClose
SetEnvironmentVariableW
FreeEnvironmentStringsW
GetEnvironmentStringsW
GetOEMCP
IsValidCodePage
SetFilePointerEx
GetConsoleMode
GetConsoleCP
FlushFileBuffers
HeapQueryInformation
EnumSystemLocalesW
GetUserDefaultLCID
IsValidLocale
WriteConsoleW
OutputDebugStringA
GetFileType
GetACP
GetCommandLineW
RtlPcToFileHeader
EncodePointer
DecodePointer
RaiseException
DuplicateHandle
WaitForSingleObjectEx
GetCurrentProcess
GetCurrentThread
GetCurrentThreadId
GetExitCodeThread
GetNativeSystemInfo
WideCharToMultiByte
QueryPerformanceCounter
SetLastError
TlsAlloc
TlsGetValue
TlsSetValue
TlsFree
GetSystemTimeAsFileTime
GetTickCount
GetModuleHandleW
GetProcAddress
MultiByteToWideChar
CompareStringW
LCMapStringW
GetLocaleInfoW
GetStringTypeW
GetCPInfo
RtlCaptureContext
RtlLookupFunctionEntry
RtlVirtualUnwind
UnhandledExceptionFilter
SetUnhandledExceptionFilter
TerminateProcess
IsProcessorFeaturePresent
IsDebuggerPresent
GetStartupInfoW
GetCurrentProcessId
InitializeSListHead
GetProcessHeap
VirtualQuery
FreeLibrary
CreateTimerQueue
SignalObjectAndWait
SwitchToThread
CreateThread
SetThreadPriority
GetThreadPriority
GetLogicalProcessorInformation
CreateTimerQueueTimer
ChangeTimerQueueTimer
DeleteTimerQueueTimer
GetNumaHighestNodeNumber
GetProcessAffinityMask
SetThreadAffinityMask
RegisterWaitForSingleObject
UnregisterWait
OutputDebugStringW
GetThreadTimes
FreeLibraryAndExitThread
GetModuleFileNameW
GetModuleHandleA
LoadLibraryExW
GetVersionExW
VirtualAlloc
VirtualFree
VirtualProtect
ReleaseSemaphore
InterlockedPopEntrySList
InterlockedPushEntrySList
InterlockedFlushSList
QueryDepthSList
UnregisterWaitEx
LoadLibraryW
RtlUnwindEx
GetModuleFileNameA
GetModuleHandleExW
HeapSize
HeapValidate
GetSystemInfo
ExitThread
ExitProcess
GetStdHandle
GetCommandLineA
ws2_32
WSAIoctl
WSACleanup
WSAStartup
socket
closesocket
advapi32
SystemFunction036
Sections
.text Size: 1.4MB - Virtual size: 1.4MB
IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ
.rdata Size: 487KB - Virtual size: 486KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
.data Size: 11KB - Virtual size: 24KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
.pdata Size: 117KB - Virtual size: 117KB
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
.rsrc Size: 512B - Virtual size: 480B
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
.reloc Size: 7KB - Virtual size: 6KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ