2024-04-19_339e0866fb2211c5ecc3e69a3fd263db_ryuk

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General

Target

2024-04-19_339e0866fb2211c5ecc3e69a3fd263db_ryuk
Size

17.9MB
MD5

339e0866fb2211c5ecc3e69a3fd263db
SHA1

80f5de0525e8e5bd72747706e3031a7ab2e51801
SHA256

24612cb2ccad68a37116c2c50e81daa1e5ae53d0c9d776f2f734c56d6a0066f3
SHA512

a7b204760375d3e8296f184d6f899df4729f31f7e73ae643acf66a04f523c80235d87680cb9c3e47528c24d0c336c8aecbe10ed4e441c30818f99c36306cd95f
SSDEEP

196608:X5xMSLL56/nuxiuEBVItpFZfrsKYC9x+3kczCDEOpcLIIok3:jLtCn2iuEBV0d4bC9xFlpcUE

Score

10^/10

Malware Config

Signatures

Detects Windows executables referencing non-Windows User-Agents 1 IoCs

resource	yara_rule
sample	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA

Unsigned PE 1 IoCs

Checks for missing Authenticode signature.

resource
2024-04-19_339e0866fb2211c5ecc3e69a3fd263db_ryuk

Files

2024-04-19_339e0866fb2211c5ecc3e69a3fd263db_ryuk
.exe windows:5 windows x64 arch:x64

6bcb8d85ca3d9b096954e3cf07adc56f

Headers

DLL Characteristics

IMAGE_DLLCHARACTERISTICS_HIGH_ENTROPY_VA
IMAGE_DLLCHARACTERISTICS_DYNAMIC_BASE
IMAGE_DLLCHARACTERISTICS_NX_COMPAT
IMAGE_DLLCHARACTERISTICS_GUARD_CF
IMAGE_DLLCHARACTERISTICS_TERMINAL_SERVER_AWARE

File Characteristics

IMAGE_FILE_EXECUTABLE_IMAGE
IMAGE_FILE_LARGE_ADDRESS_AWARE

Imports

progwrp

AcquireSRWLockExclusive
AcquireSRWLockShared
CancelIoEx
DeleteProcThreadAttributeList
EncodePointer
FindFirstFileExW
FlsAlloc
FlsFree
FlsGetValue
FlsSetValue
GetAdaptersAddresses
GetCurrencyFormatEx
GetDateFormatEx
GetDynamicTimeZoneInformation
GetGeoInfoW
GetLocaleInfoEx
GetLogicalProcessorInformation
GetLogicalProcessorInformationEx
GetModuleHandleExW
GetModuleInformation
GetNamedPipeClientProcessId
GetNamedPipeServerProcessId
GetNativeSystemInfo
GetNumberFormatEx
GetProcAddress
GetProcessId
GetProductInfo
GetThreadId
GetTimeFormatEx
GetUserGeoID
InitOnceExecuteOnce
InitializeConditionVariable
InitializeProcThreadAttributeList
InitializeSListHead
InitializeSRWLock
InterlockedPushEntrySList
IsWow64Process
LoadLibraryW
QueryThreadCycleTime
QueryWorkingSetEx
ReleaseSRWLockExclusive
ReleaseSRWLockShared
ResolveLocaleName
RtlGetLastNtStatus
SHGetKnownFolderPath
SetFileInformationByHandle
SleepConditionVariableSRW
SymGetSearchPathW
SymSetSearchPathW
SystemFunction036
TLSInit_DllMain_ThreadAttach
TryAcquireSRWLockExclusive
TzSpecificLocalTimeToSystemTime
UpdateProcThreadAttribute
WakeAllConditionVariable
WakeConditionVariable
freeaddrinfo
getaddrinfo
inet_ntop

advapi32

BuildTrusteeWithSidW
ConvertStringSecurityDescriptorToSecurityDescriptorW
ConvertStringSidToSidW
CreateProcessAsUserW
GetLengthSid
GetNamedSecurityInfoW
GetSecurityDescriptorControl
GetSecurityDescriptorDacl
GetSecurityDescriptorGroup
GetSecurityDescriptorOwner
GetSecurityDescriptorSacl
InitializeAcl
InitializeSecurityDescriptor
IsValidAcl
IsValidSecurityDescriptor
IsValidSid
RegCloseKey
RegCreateKeyExW
RegEnumKeyExW
RegNotifyChangeKeyValue
RegOpenKeyExW
RegQueryInfoKeyW
RegQueryValueExW
SetEntriesInAclW
SetNamedSecurityInfoW
SetSecurityDescriptorDacl
SetSecurityInfo

dbghelp

SymCleanup
SymFromAddr
SymGetLineFromAddr64
SymInitialize
SymSetOptions

user32

AllowSetForegroundWindow
CreateWindowExW
DefWindowProcW
DestroyWindow
DispatchMessageW
GetActiveWindow
GetQueueStatus
KillTimer
LoadKeyboardLayoutW
MapVirtualKeyW
MsgWaitForMultipleObjectsEx
PeekMessageW
PostMessageW
PostQuitMessage
RegisterClassExW
SetTimer
ToUnicode
TranslateMessage
UnregisterClassW
VkKeyScanW

ws2_32

WSACloseEvent
WSACreateEvent
WSAEnumNetworkEvents
WSAEventSelect
WSAGetLastError
WSAGetOverlappedResult
WSAIoctl
WSARecvFrom
WSAResetEvent
WSASend
WSASendTo
WSASocketW
WSAStartup
accept
bind
closesocket
connect
gethostname
getpeername
getsockname
getsockopt
htonl
htons
ioctlsocket
listen
ntohs
recv
recvfrom
sendto
setsockopt
shutdown
socket

kernel32

AreFileApisANSI
AssignProcessToJobObject
CancelIo
CloseHandle
CompareStringW
ConnectNamedPipe
CreateDirectoryW
CreateEventW
CreateFileA
CreateFileMappingW
CreateFileW
CreateIoCompletionPort
CreateMutexW
CreateNamedPipeW
CreatePipe
CreateProcessW
CreateThread
DeleteCriticalSection
DeleteFileA
DeleteFileW
DuplicateHandle
EnterCriticalSection
EnumSystemLocalesW
ExitProcess
ExitThread
ExpandEnvironmentStringsW
FileTimeToSystemTime
FindClose
FindNextFileW
FlushFileBuffers
FlushViewOfFile
FormatMessageA
FormatMessageW
FreeEnvironmentStringsW
FreeLibrary
FreeLibraryAndExitThread
GetACP
GetCPInfo
GetCommandLineA
GetCommandLineW
GetConsoleMode
GetConsoleOutputCP
GetCurrentDirectoryW
GetCurrentProcess
GetCurrentProcessId
GetCurrentThread
GetCurrentThreadId
GetDateFormatW
GetDiskFreeSpaceA
GetDiskFreeSpaceExW
GetDiskFreeSpaceW
GetDriveTypeW
GetEnvironmentStringsW
GetEnvironmentVariableW
GetExitCodeProcess
GetFileAttributesA
GetFileAttributesExW
GetFileAttributesW
GetFileInformationByHandle
GetFileSize
GetFileSizeEx
GetFileType
GetFullPathNameA
GetFullPathNameW
GetLastError
GetLocalTime
GetLocaleInfoW
GetLongPathNameW
GetModuleFileNameW
GetModuleHandleA
GetModuleHandleW
GetOEMCP
GetProcessHeap
GetProcessTimes
GetQueuedCompletionStatus
GetStartupInfoW
GetStdHandle
GetStringTypeW
GetSystemDirectoryW
GetSystemInfo
GetSystemTime
GetSystemTimeAsFileTime
GetTempPathA
GetTempPathW
GetThreadPriority
GetTickCount
GetTimeFormatW
GetTimeZoneInformation
GetUserDefaultLCID
GetVersionExW
GetWindowsDirectoryW
GlobalFree
GlobalMemoryStatusEx
HeapAlloc
HeapCompact
HeapCreate
HeapDestroy
HeapFree
HeapReAlloc
HeapSize
HeapValidate
InitializeCriticalSection
InitializeCriticalSectionAndSpinCount
IsDebuggerPresent
IsProcessorFeaturePresent
IsValidCodePage
IsValidLocale
LCMapStringW
LeaveCriticalSection
LoadLibraryExA
LoadLibraryExW
LocalFree
LockFile
LockFileEx
MapViewOfFile
MoveFileExW
MoveFileW
MultiByteToWideChar
OpenProcess
OutputDebugStringA
OutputDebugStringW
PostQueuedCompletionStatus
QueryPerformanceCounter
QueryPerformanceFrequency
RaiseException
ReadConsoleW
ReadFile
RegisterWaitForSingleObject
RemoveDirectoryW
ReplaceFileW
ResetEvent
SetEndOfFile
SetEnvironmentVariableW
SetEvent
SetFileAttributesW
SetFilePointer
SetFilePointerEx
SetFileTime
SetHandleInformation
SetLastError
SetStdHandle
SetThreadPriority
SetUnhandledExceptionFilter
Sleep
SwitchToThread
SystemTimeToFileTime
SystemTimeToTzSpecificLocalTime
TerminateProcess
TlsAlloc
TlsFree
TlsGetValue
TlsSetValue
TryEnterCriticalSection
UnhandledExceptionFilter
UnlockFile
UnlockFileEx
UnmapViewOfFile
UnregisterWaitEx
VirtualAlloc
VirtualFree
VirtualProtect
VirtualQuery
WaitForMultipleObjects
WaitForSingleObject
WaitForSingleObjectEx
WaitNamedPipeW
WideCharToMultiByte
WriteConsoleW
WriteFile

userenv

CreateEnvironmentBlock
DestroyEnvironmentBlock

shell32

CommandLineToArgvW
ord680
SHGetFolderPathW
ShellExecuteExW

shlwapi

PathMatchSpecW

winmm

timeBeginPeriod
timeEndPeriod
timeGetTime

ole32

CoInitializeEx
CoRegisterInitializeSpy
CoRevokeInitializeSpy
CoTaskMemFree
CoUninitialize

ntdll

RtlCaptureContext
RtlCaptureStackBackTrace
RtlLookupFunctionEntry
RtlPcToFileHeader
RtlUnwind
RtlUnwindEx
RtlVirtualUnwind

secur32

AcquireCredentialsHandleW
DeleteSecurityContext
FreeContextBuffer
FreeCredentialsHandle
InitializeSecurityContextW
QueryContextAttributesW
QuerySecurityPackageInfoW

winhttp

WinHttpCloseHandle
WinHttpGetIEProxyConfigForCurrentUser
WinHttpGetProxyForUrl
WinHttpOpen
WinHttpSetTimeouts

urlmon

CoInternetCreateSecurityManager

crypt32

CertAddStoreToCollection
CertCloseStore
CertControlStore
CertFindCertificateInStore
CertGetEnhancedKeyUsage
CertOpenStore

Exports

Exports

GetHandleVerifier
sqlite3_dbdata_init

Sections

.text
Size: 13.8MB - Virtual size: 13.8MB

IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ

.rdata
Size: 3.6MB - Virtual size: 3.6MB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.data
Size: 98KB - Virtual size: 180KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

.pdata
Size: 306KB - Virtual size: 305KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.gxfg
Size: 13KB - Virtual size: 12KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.retplne
Size: 512B - Virtual size: 172B

.rodata
Size: 2KB - Virtual size: 2KB

IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ

.tls
Size: 1024B - Virtual size: 721B

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

_RDATA
Size: 512B - Virtual size: 500B

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

malloc_h
Size: 2KB - Virtual size: 1KB

IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ

.rsrc
Size: 59KB - Virtual size: 58KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.reloc
Size: 68KB - Virtual size: 67KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ

Sharing

General

Malware Config

Signatures

Files

6bcb8d85ca3d9b096954e3cf07adc56f

Headers

DLL Characteristics

File Characteristics

Imports

progwrp

advapi32

dbghelp

user32

ws2_32

kernel32

userenv

shell32

shlwapi

winmm

ole32

ntdll

secur32

winhttp

urlmon

crypt32

Exports

Exports

Sections

.text Size: 13.8MB - Virtual size: 13.8MB

.rdata Size: 3.6MB - Virtual size: 3.6MB

.data Size: 98KB - Virtual size: 180KB

.pdata Size: 306KB - Virtual size: 305KB

.gxfg Size: 13KB - Virtual size: 12KB

.retplne Size: 512B - Virtual size: 172B

.rodata Size: 2KB - Virtual size: 2KB

.tls Size: 1024B - Virtual size: 721B

_RDATA Size: 512B - Virtual size: 500B

malloc_h Size: 2KB - Virtual size: 1KB

.rsrc Size: 59KB - Virtual size: 58KB

.reloc Size: 68KB - Virtual size: 67KB

.text
Size: 13.8MB - Virtual size: 13.8MB

.rdata
Size: 3.6MB - Virtual size: 3.6MB

.data
Size: 98KB - Virtual size: 180KB

.pdata
Size: 306KB - Virtual size: 305KB

.gxfg
Size: 13KB - Virtual size: 12KB

.retplne
Size: 512B - Virtual size: 172B

.rodata
Size: 2KB - Virtual size: 2KB

.tls
Size: 1024B - Virtual size: 721B

_RDATA
Size: 512B - Virtual size: 500B

malloc_h
Size: 2KB - Virtual size: 1KB

.rsrc
Size: 59KB - Virtual size: 58KB

.reloc
Size: 68KB - Virtual size: 67KB