Static task
static1
Behavioral task
behavioral1
Sample
2024-04-18_e95af1ada95ffa38ed64d82a4c61f377_ryuk.exe
Resource
win7-20240220-en
Behavioral task
behavioral2
Sample
2024-04-18_e95af1ada95ffa38ed64d82a4c61f377_ryuk.exe
Resource
win10v2004-20240412-en
General
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Target
2024-04-18_e95af1ada95ffa38ed64d82a4c61f377_ryuk
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Size
205KB
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MD5
e95af1ada95ffa38ed64d82a4c61f377
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SHA1
f7ad617dc4a9e984734259d19f7cd5a44da8cced
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SHA256
9d70fcf8388d55110cae8ce0c7d8245aaa6bfc6c255a6147367623ca9783ab7c
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SHA512
bac7e11b882e1338929d1b463c33ed5eb9b94f61587e128e5d0853e83682b74ab6ca19156f9babd14b6351cecd29a94086d2b9a79bc3b58b0c1075436329f530
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SSDEEP
6144:Tg9SDmUQAXLbfSGh0lF+CLsScjdSsaK6:E9SDmUDXPfClFmjdm
Malware Config
Signatures
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Unsigned PE 1 IoCs
Checks for missing Authenticode signature.
resource 2024-04-18_e95af1ada95ffa38ed64d82a4c61f377_ryuk
Files
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2024-04-18_e95af1ada95ffa38ed64d82a4c61f377_ryuk.exe windows:5 windows x64 arch:x64
f8e2d7b4be3eb63c307f7e91280c502f
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
ReleaseMutex
GetLastError
GetStartupInfoA
CreateProcessA
HeapFree
Sleep
HeapAlloc
GetProcessHeap
GetTickCount
EnterCriticalSection
LeaveCriticalSection
InitializeCriticalSection
GetWindowsDirectoryA
DeleteCriticalSection
GetSystemDirectoryA
DeleteFileA
CreateThread
CreateDirectoryA
VirtualFree
VirtualAlloc
FreeConsole
ExitProcess
SetUnhandledExceptionFilter
MultiByteToWideChar
WideCharToMultiByte
SetFileTime
GetCurrentDirectoryA
LocalFileTimeToFileTime
CreateFileW
SystemTimeToFileTime
UnmapViewOfFile
WriteConsoleW
SetFilePointerEx
HeapReAlloc
HeapSize
WaitForSingleObject
CreateMutexA
SetFilePointer
GetCurrentProcess
CloseHandle
CreateFileA
WriteFile
GetFileSizeEx
ReadFile
LocalFree
LocalAlloc
GetConsoleMode
GetConsoleCP
FlushFileBuffers
GetStringTypeW
SetStdHandle
FindNextFileA
FindFirstFileExA
FindClose
SetEnvironmentVariableA
FreeEnvironmentStringsW
GetEnvironmentStringsW
GetCPInfo
GetOEMCP
GetCurrentThreadId
GetFileAttributesA
RtlCaptureContext
RtlLookupFunctionEntry
RtlVirtualUnwind
UnhandledExceptionFilter
TerminateProcess
IsProcessorFeaturePresent
IsDebuggerPresent
GetStartupInfoW
GetModuleHandleW
QueryPerformanceCounter
GetCurrentProcessId
GetSystemTimeAsFileTime
InitializeSListHead
RtlPcToFileHeader
EncodePointer
RaiseException
RtlUnwindEx
GetModuleFileNameW
SetLastError
InitializeCriticalSectionAndSpinCount
TlsAlloc
TlsGetValue
TlsSetValue
TlsFree
FreeLibrary
GetProcAddress
LoadLibraryExW
GetModuleHandleExW
GetStdHandle
GetModuleFileNameA
GetCommandLineA
GetCommandLineW
GetACP
CompareStringW
LCMapStringW
GetFileType
IsValidCodePage
user32
wsprintfA
advapi32
SystemFunction036
CryptImportKey
CryptVerifySignatureA
CryptAcquireContextA
CryptCreateHash
CryptHashData
CryptDestroyHash
CryptReleaseContext
ws2_32
bind
WSAIoctl
closesocket
select
listen
WSAStartup
accept
socket
recv
htonl
htons
setsockopt
gethostbyname
gethostname
__WSAFDIsSet
inet_addr
send
connect
iphlpapi
GetTcpTable
Sections
.text Size: 128KB - Virtual size: 127KB
IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ
.rdata Size: 57KB - Virtual size: 57KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
.data Size: 8KB - Virtual size: 12KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
.pdata Size: 8KB - Virtual size: 7KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
.rsrc Size: 1024B - Virtual size: 1000B
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
.reloc Size: 2KB - Virtual size: 1KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ