Static task
static1
Behavioral task
behavioral1
Sample
2024-03-28_af5d43475fb5a2cfb98d359d08df7fd1_ryuk.exe
Resource
win7-20231129-en
Behavioral task
behavioral2
Sample
2024-03-28_af5d43475fb5a2cfb98d359d08df7fd1_ryuk.exe
Resource
win10v2004-20240226-en
General
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Target
2024-03-28_af5d43475fb5a2cfb98d359d08df7fd1_ryuk
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Size
4.9MB
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MD5
af5d43475fb5a2cfb98d359d08df7fd1
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SHA1
af757310b7d75513842e7b05d9ebe0855c88ee00
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SHA256
94717ff72ab2c2465df984bed7d3c81e0625ae27324f59e0aed6b5f9e428c3ef
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SHA512
4767b0407fb5cb617f56bcfc35863ae0537e06563bbd213b401c068053326092e4e9d1186f6702827fb547046c7c848f7fa07ddd78f235b6e0ccd25d2bc9df8e
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SSDEEP
98304:KAsskRAdKvmGy0cljyi9vzlVkOekp/ekPjqgBE0d:OskRM3U0BV4kYmqQ9
Malware Config
Signatures
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Unsigned PE 1 IoCs
Checks for missing Authenticode signature.
resource 2024-03-28_af5d43475fb5a2cfb98d359d08df7fd1_ryuk
Files
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2024-03-28_af5d43475fb5a2cfb98d359d08df7fd1_ryuk.exe windows:6 windows x64 arch:x64
2a37d3828eb7ba7a8684d9f6d6404c72
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
AcquireSRWLockExclusive
CloseHandle
CompareStringEx
CompareStringW
CreateEventW
CreateFileW
CreateThread
DecodePointer
DeleteCriticalSection
EncodePointer
EnterCriticalSection
EnumSystemLocalesW
ExitProcess
ExitThread
FindClose
FindFirstFileExW
FindNextFileW
FlushFileBuffers
FormatMessageW
FreeEnvironmentStringsW
FreeLibrary
FreeLibraryAndExitThread
GetACP
GetCPInfo
GetCommandLineA
GetCommandLineW
GetConsoleMode
GetConsoleOutputCP
GetCurrentProcess
GetCurrentProcessId
GetCurrentThreadId
GetDateFormatW
GetEnvironmentStringsW
GetFileSize
GetFileType
GetLastError
GetLocaleInfoEx
GetLocaleInfoW
GetModuleFileNameW
GetModuleHandleExW
GetModuleHandleW
GetOEMCP
GetProcAddress
GetProcessHeap
GetStartupInfoW
GetStdHandle
GetStringTypeW
GetSystemFirmwareTable
GetSystemTimeAsFileTime
GetTimeFormatW
GetTimeZoneInformation
GetUserDefaultLCID
GlobalAlloc
GlobalFree
GlobalLock
GlobalUnlock
HeapAlloc
HeapFree
HeapReAlloc
HeapSize
InitializeCriticalSectionAndSpinCount
InitializeCriticalSectionEx
InitializeSListHead
InitializeSRWLock
IsDebuggerPresent
IsProcessorFeaturePresent
IsValidCodePage
IsValidLocale
LCMapStringEx
LCMapStringW
LeaveCriticalSection
LoadLibraryExW
LocalFree
MultiByteToWideChar
QueryPerformanceCounter
QueryPerformanceFrequency
RaiseException
ReadFile
ReleaseSRWLockExclusive
ResetEvent
RtlCaptureContext
RtlLookupFunctionEntry
RtlPcToFileHeader
RtlUnwind
RtlUnwindEx
RtlVirtualUnwind
SetEnvironmentVariableW
SetEvent
SetFilePointerEx
SetLastError
SetStdHandle
SetUnhandledExceptionFilter
TerminateProcess
TlsAlloc
TlsFree
TlsGetValue
TlsSetValue
TryAcquireSRWLockExclusive
UnhandledExceptionFilter
WaitForSingleObjectEx
WideCharToMultiByte
WriteConsoleW
WriteFile
user32
CloseClipboard
CreateWindowExW
DefWindowProcW
DispatchMessageW
EmptyClipboard
GetCaretBlinkTime
GetClientRect
GetClipboardData
GetDesktopWindow
GetKeyState
GetMessageW
GetSystemMetrics
GetWindowInfo
GetWindowLongPtrW
GetWindowRect
IsZoomed
LoadCursorW
LoadIconW
MessageBoxW
OpenClipboard
PostMessageA
PostQuitMessage
RegisterClassW
ScreenToClient
SetClassLongPtrW
SetClipboardData
SetWindowLongPtrW
SetWindowPos
ShowWindow
TranslateMessage
advapi32
RegCloseKey
RegOpenKeyW
RegSetValueExW
ole32
CoTaskMemFree
shell32
CommandLineToArgvW
gdi32
CreateSolidBrush
ntdll
RtlNtStatusToDosError
ws2_32
ioctlsocket
dwrite
DWriteCreateFactory
d2d1
ord1
ord2
Sections
.jqey Size: 725KB - Virtual size: 724KB
IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ
krYCqn Size: 129KB - Virtual size: 129KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
.vpiMXB Size: 19KB - Virtual size: 18KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
aXPViNx0 Size: 512B - Virtual size: 188B
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
.zgePJx1 Size: 1KB - Virtual size: 1KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
.VuFh Size: 512B - Virtual size: 480B
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
.text Size: 4.1MB - Virtual size: 4.1MB
IMAGE_SCN_CNT_CODE
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ
.PPucbC Size: 5KB - Virtual size: 5KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
.sCEkVa Size: 512B - Virtual size: 472B
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE