2024-04-27_8481dd59e9b95e296b01ee221498f74f_ryuk

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General

Target

2024-04-27_8481dd59e9b95e296b01ee221498f74f_ryuk
Size

768KB
MD5

8481dd59e9b95e296b01ee221498f74f
SHA1

99fdf24b387a96968542d94a97e626b427bdf268
SHA256

9841163750e66cc7a301a6f466b08bdfd93f4872a060de2fe2c1c38edc9a2e54
SHA512

778e682f3c46a06301016e3b18819a7601d6e101f3d24aab0b4418cf9192cace94b2ae0a470b57eed42224eec5b3b65167cee34748c39bd3a7b83edf1610ab78
SSDEEP

12288:3NYPyw2VEBuyQmV86mC8pCTNKk5/E1oz7ZwLLnn+IJdosyWfHsah:3e/uyjgiKkSu7Z+7n5oWP

Score

3^/10

Malware Config

Signatures

Unsigned PE 1 IoCs

Checks for missing Authenticode signature.

resource
2024-04-27_8481dd59e9b95e296b01ee221498f74f_ryuk

Files

2024-04-27_8481dd59e9b95e296b01ee221498f74f_ryuk
.exe windows:6 windows x64 arch:x64

21531d330eafd60a068f4606138c29c8

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

PDB Paths

C:\BuildAgent\work\b5d6621a400c136\VCAS\vcast\src\hostapp\x64\Release\chmsg.pdb

Imports

kernel32

WriteFile
Sleep
RaiseException
InitializeCriticalSectionEx
DecodePointer
HeapAlloc
HeapFree
HeapReAlloc
HeapSize
GetProcessHeap
GetCurrentProcess
CreateFileA
GetMailslotInfo
ReadFile
MultiByteToWideChar
GetFileAttributesA
GetCurrentProcessId
ProcessIdToSessionId
LoadLibraryW
UnregisterWaitEx
QueryDepthSList
InterlockedPopEntrySList
ReleaseSemaphore
VirtualProtect
VirtualFree
VirtualAlloc
CreateFileW
CreateThread
ResetEvent
SetEvent
GetLastError
CloseHandle
CreateEventW
OutputDebugStringA
OutputDebugStringW
LeaveCriticalSection
EnterCriticalSection
CreateMailslotA
DeleteCriticalSection
GetVersionExW
GetModuleHandleA
GetThreadTimes
UnregisterWait
WaitForSingleObjectEx
GetModuleHandleW
GetProcAddress
RtlCaptureContext
RtlLookupFunctionEntry
RtlVirtualUnwind
UnhandledExceptionFilter
SetUnhandledExceptionFilter
TerminateProcess
IsProcessorFeaturePresent
IsDebuggerPresent
GetStartupInfoW
QueryPerformanceCounter
GetCurrentThreadId
GetSystemTimeAsFileTime
InitializeSListHead
WideCharToMultiByte
DuplicateHandle
GetCurrentThread
GetExitCodeThread
TryEnterCriticalSection
EncodePointer
SetLastError
InitializeCriticalSectionAndSpinCount
TlsAlloc
TlsGetValue
TlsSetValue
TlsFree
GetTickCount
CompareStringW
LCMapStringW
GetLocaleInfoW
GetStringTypeW
GetCPInfo
RtlPcToFileHeader
RtlUnwindEx
FreeLibrary
LoadLibraryExW
InterlockedPushEntrySList
InterlockedFlushSList
GetFileType
GetConsoleCP
GetConsoleMode
ExitProcess
GetModuleHandleExW
GetModuleFileNameW
GetStdHandle
GetCommandLineA
GetCommandLineW
GetACP
ExitThread
FreeLibraryAndExitThread
SetStdHandle
SetEndOfFile
ReadConsoleW
SetFilePointerEx
WriteConsoleW
GetDateFormatW
GetTimeFormatW
IsValidLocale
GetUserDefaultLCID
EnumSystemLocalesW
FlushFileBuffers
FindClose
FindFirstFileExW
FindNextFileW
IsValidCodePage
GetOEMCP
GetEnvironmentStringsW
FreeEnvironmentStringsW
SetEnvironmentVariableA
SetEnvironmentVariableW
GetTimeZoneInformation
CreateTimerQueue
SignalObjectAndWait
SwitchToThread
SetThreadPriority
GetThreadPriority
GetLogicalProcessorInformation
CreateTimerQueueTimer
ChangeTimerQueueTimer
DeleteTimerQueueTimer
GetNumaHighestNodeNumber
GetProcessAffinityMask
SetThreadAffinityMask
RegisterWaitForSingleObject

user32

MonitorFromWindow
GetMonitorInfoW
EnumDisplayDevicesW
EnumWindows
GetWindowTextW
EnumChildWindows
ClientToScreen
GetClassNameW

advapi32

RegOpenKeyExW
RegCloseKey
SetSecurityDescriptorDacl
InitializeSecurityDescriptor
AddAccessAllowedAce
InitializeAcl
GetSidLengthRequired
GetSidSubAuthority
InitializeSid
RegQueryValueExW

ole32

CoUninitialize
CoInitializeEx
CoCreateInstance

Sections

.text
Size: 531KB - Virtual size: 530KB

IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ

.rdata
Size: 182KB - Virtual size: 181KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.data
Size: 14KB - Virtual size: 23KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

.pdata
Size: 27KB - Virtual size: 27KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.gfids
Size: 4KB - Virtual size: 4KB

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: 1KB - Virtual size: 1KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.reloc
Size: 6KB - Virtual size: 5KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ

Sharing

General

Malware Config

Signatures

Files

21531d330eafd60a068f4606138c29c8

Headers

DLL Characteristics

File Characteristics

PDB Paths

Imports

kernel32

user32

advapi32

ole32

Sections

.text Size: 531KB - Virtual size: 530KB

.rdata Size: 182KB - Virtual size: 181KB

.data Size: 14KB - Virtual size: 23KB

.pdata Size: 27KB - Virtual size: 27KB

.gfids Size: 4KB - Virtual size: 4KB

.tls Size: 512B - Virtual size: 9B

.rsrc Size: 1KB - Virtual size: 1KB

.reloc Size: 6KB - Virtual size: 5KB

.text
Size: 531KB - Virtual size: 530KB

.rdata
Size: 182KB - Virtual size: 181KB

.data
Size: 14KB - Virtual size: 23KB

.pdata
Size: 27KB - Virtual size: 27KB

.gfids
Size: 4KB - Virtual size: 4KB

.tls
Size: 512B - Virtual size: 9B

.rsrc
Size: 1KB - Virtual size: 1KB

.reloc
Size: 6KB - Virtual size: 5KB