2024-02-13_b374e7d829353a9eac524c5a7a90dd73_ryuk

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General

Target

2024-02-13_b374e7d829353a9eac524c5a7a90dd73_ryuk
Size

13.6MB
MD5

b374e7d829353a9eac524c5a7a90dd73
SHA1

5ec4349acb24b77977e7b832c769bebb6cc80e29
SHA256

b8ca62db4a7d9302f6a0dad34eae30d6e0269ebacfb4e4d6fd010425e0fc3351
SHA512

76dba3dff130883df3e0a95603f8d982fbae9c2b96e123312ea384f0a6af351ea2b98229a3cd5c2593aa65c479e7c52a1201ce1f1e450572f09083309c2e8c86
SSDEEP

196608:NzfV5X3oBZi0t0Mfc5ihOkIhCZa6kBndrsFG:Nz3X+Zi0tvLADhCZSS4

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
2024-02-13_b374e7d829353a9eac524c5a7a90dd73_ryuk

Files

2024-02-13_b374e7d829353a9eac524c5a7a90dd73_ryuk
.exe windows:5 windows x64 arch:x64

0775470e8fdb56c978e81430af727c2e

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

advapi32

ConvertStringSecurityDescriptorToSecurityDescriptorW
CreateProcessAsUserW
EventRegister
EventUnregister
EventWrite
InitializeAcl
InitializeSecurityDescriptor
RegCloseKey
RegCreateKeyExW
RegNotifyChangeKeyValue
RegOpenKeyExW
RegQueryInfoKeyW
RegQueryValueExW
SetSecurityDescriptorDacl
SystemFunction036

dbghelp

SymCleanup
SymFromAddr
SymGetLineFromAddr64
SymGetSearchPathW
SymInitialize
SymSetOptions
SymSetSearchPathW

user32

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

ws2_32

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

kernel32

AcquireSRWLockExclusive
AcquireSRWLockShared
AssignProcessToJobObject
CallbackMayRunLong
CancelIo
CloseHandle
CloseThreadpool
CloseThreadpoolWork
CompareStringW
ConnectNamedPipe
CreateDirectoryW
CreateEventW
CreateFileA
CreateFileMappingW
CreateFileW
CreateIoCompletionPort
CreateNamedPipeW
CreateProcessW
CreateThread
CreateThreadpool
CreateThreadpoolWork
DebugBreak
DeleteCriticalSection
DeleteFileW
DeleteProcThreadAttributeList
DuplicateHandle
EncodePointer
EnterCriticalSection
EnumSystemLocalesW
ExitProcess
ExitThread
ExpandEnvironmentStringsW
FileTimeToSystemTime
FindClose
FindFirstFileExW
FindNextFileW
FlsAlloc
FlsSetValue
FlushFileBuffers
FormatMessageA
FormatMessageW
FreeEnvironmentStringsW
FreeLibrary
FreeLibraryAndExitThread
GetACP
GetCPInfo
GetCommandLineA
GetCommandLineW
GetConsoleMode
GetConsoleOutputCP
GetCurrentDirectoryW
GetCurrentProcess
GetCurrentProcessId
GetCurrentThread
GetCurrentThreadId
GetDateFormatW
GetDiskFreeSpaceExW
GetDriveTypeW
GetEnvironmentStringsW
GetEnvironmentVariableW
GetExitCodeProcess
GetFileAttributesExW
GetFileAttributesW
GetFileInformationByHandle
GetFileSizeEx
GetFileType
GetFullPathNameW
GetLastError
GetLocalTime
GetLocaleInfoW
GetLogicalProcessorInformation
GetLongPathNameW
GetModuleFileNameW
GetModuleHandleA
GetModuleHandleExW
GetModuleHandleW
GetNativeSystemInfo
GetOEMCP
GetProcAddress
GetProcessHeap
GetProcessId
GetProcessTimes
GetProductInfo
GetQueuedCompletionStatus
GetStartupInfoW
GetStdHandle
GetStringTypeW
GetSystemDirectoryW
GetSystemInfo
GetSystemTimeAsFileTime
GetTempPathW
GetThreadId
GetThreadPriority
GetTickCount
GetTimeFormatW
GetTimeZoneInformation
GetUserDefaultLCID
GetVersionExW
GetWindowsDirectoryW
GlobalFree
GlobalMemoryStatusEx
InitOnceExecuteOnce
InitializeConditionVariable
InitializeCriticalSectionAndSpinCount
InitializeProcThreadAttributeList
InitializeSListHead
InitializeSRWLock
IsDebuggerPresent
IsProcessorFeaturePresent
IsValidCodePage
IsValidLocale
IsWow64Process
K32QueryWorkingSetEx
LCMapStringW
LeaveCriticalSection
LoadLibraryExA
LoadLibraryExW
LoadLibraryW
LocalFree
MapViewOfFile
MoveFileExW
MoveFileW
MultiByteToWideChar
OutputDebugStringA
PostQueuedCompletionStatus
QueryPerformanceCounter
QueryPerformanceFrequency
QueryThreadCycleTime
RaiseException
ReadConsoleW
ReadFile
RegisterWaitForSingleObject
ReleaseSRWLockExclusive
ReleaseSRWLockShared
RemoveDirectoryW
ReplaceFileW
ResetEvent
RtlCaptureContext
RtlCaptureStackBackTrace
RtlLookupFunctionEntry
RtlPcToFileHeader
RtlUnwind
RtlUnwindEx
RtlVirtualUnwind
SetEndOfFile
SetEnvironmentVariableW
SetEvent
SetFileAttributesW
SetFileInformationByHandle
SetFilePointer
SetFilePointerEx
SetFileTime
SetHandleInformation
SetLastError
SetStdHandle
SetThreadPriority
SetThreadpoolThreadMaximum
SetThreadpoolThreadMinimum
SetUnhandledExceptionFilter
Sleep
SleepConditionVariableSRW
SubmitThreadpoolWork
SwitchToThread
SystemTimeToFileTime
SystemTimeToTzSpecificLocalTime
TerminateProcess
TlsAlloc
TlsFree
TlsGetValue
TlsSetValue
TryAcquireSRWLockExclusive
TzSpecificLocalTimeToSystemTime
UnhandledExceptionFilter
UnmapViewOfFile
UnregisterWaitEx
UpdateProcThreadAttribute
VerSetConditionMask
VerifyVersionInfoW
VirtualAlloc
VirtualFree
VirtualProtect
VirtualQuery
WaitForMultipleObjects
WaitForSingleObject
WaitForSingleObjectEx
WaitForThreadpoolWorkCallbacks
WaitNamedPipeW
WakeAllConditionVariable
WakeConditionVariable
WideCharToMultiByte
WriteConsoleW
WriteFile

iphlpapi

GetAdaptersAddresses

shell32

CommandLineToArgvW
SHGetFolderPathW
SHGetKnownFolderPath

userenv

CreateEnvironmentBlock
DestroyEnvironmentBlock

shlwapi

PathMatchSpecW

winmm

timeBeginPeriod
timeEndPeriod
timeGetTime

ole32

CoInitializeEx
CoRegisterInitializeSpy
CoRevokeInitializeSpy
CoTaskMemFree
CoUninitialize

crypt32

CertAddEncodedCertificateToStore
CertCloseStore
CertCompareCertificateName
CertCreateCTLContext
CertCreateCertificateChainEngine
CertDuplicateCertificateContext
CertFindExtension
CertFreeCTLContext
CertFreeCertificateChain
CertFreeCertificateChainEngine
CertFreeCertificateContext
CertGetCertificateChain
CertGetCertificateContextProperty
CertGetIssuerCertificateFromStore
CertOpenStore
CertSetCertificateContextProperty
CertVerifyCertificateChainPolicy
CryptDecodeObjectEx
CryptInstallOIDFunctionAddress
CryptVerifyCertificateSignatureEx

secur32

AcquireCredentialsHandleW
DeleteSecurityContext
FreeContextBuffer
FreeCredentialsHandle
InitializeSecurityContextW
QueryContextAttributesW
QuerySecurityPackageInfoW

winhttp

WinHttpCloseHandle
WinHttpGetIEProxyConfigForCurrentUser
WinHttpGetProxyForUrl
WinHttpOpen
WinHttpSetTimeouts

urlmon

CoInternetCreateSecurityManager

Exports

Exports

GetHandleVerifier

Sections

.text
Size: 10.1MB - Virtual size: 10.1MB

IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ

.rdata
Size: 3.1MB - Virtual size: 3.1MB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.data
Size: 41KB - Virtual size: 102KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

.pdata
Size: 243KB - Virtual size: 242KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.00cfg
Size: 512B - Virtual size: 40B

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.retplne
Size: 512B - Virtual size: 48B

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

IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ

.tls
Size: 512B - Virtual size: 417B

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

.voltbl
Size: 512B - Virtual size: 68B

_RDATA
Size: 512B - Virtual size: 244B

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

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

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.reloc
Size: 48KB - Virtual size: 47KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ

Sharing

General

Malware Config

Signatures

Files

0775470e8fdb56c978e81430af727c2e

Headers

DLL Characteristics

File Characteristics

Imports

advapi32

dbghelp

user32

ws2_32

kernel32

iphlpapi

shell32

userenv

shlwapi

winmm

ole32

crypt32

secur32

winhttp

urlmon

Exports

Exports

Sections

.text Size: 10.1MB - Virtual size: 10.1MB

.rdata Size: 3.1MB - Virtual size: 3.1MB

.data Size: 41KB - Virtual size: 102KB

.pdata Size: 243KB - Virtual size: 242KB

.00cfg Size: 512B - Virtual size: 40B

.retplne Size: 512B - Virtual size: 48B

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

.tls Size: 512B - Virtual size: 417B

.voltbl Size: 512B - Virtual size: 68B

_RDATA Size: 512B - Virtual size: 244B

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

.reloc Size: 48KB - Virtual size: 47KB

.text
Size: 10.1MB - Virtual size: 10.1MB

.rdata
Size: 3.1MB - Virtual size: 3.1MB

.data
Size: 41KB - Virtual size: 102KB

.pdata
Size: 243KB - Virtual size: 242KB

.00cfg
Size: 512B - Virtual size: 40B

.retplne
Size: 512B - Virtual size: 48B

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

.tls
Size: 512B - Virtual size: 417B

.voltbl
Size: 512B - Virtual size: 68B

_RDATA
Size: 512B - Virtual size: 244B

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

.reloc
Size: 48KB - Virtual size: 47KB