Behavioral task
behavioral1
Sample
2024-07-03_4fbfbc58870e49724fdfe2f2b04abf5f_ryuk.exe
Resource
win7-20240611-en
Behavioral task
behavioral2
Sample
2024-07-03_4fbfbc58870e49724fdfe2f2b04abf5f_ryuk.exe
Resource
win10v2004-20240508-en
General
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Target
2024-07-03_4fbfbc58870e49724fdfe2f2b04abf5f_ryuk
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Size
12.0MB
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MD5
4fbfbc58870e49724fdfe2f2b04abf5f
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SHA1
5fbb195737daea971b9f73af829b9df0b7d16f46
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SHA256
444bddfe53af79baf02ffaa3da5a4434f1b5774b6166e3b993aa497013adbb08
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SHA512
e5a4981b42745a83357455a25d47505a7b202dee82f3de09220553c22aeb79c702af012527dec46c0d7162f8ed83a3a4ed6420dc8456eccb19baf7f4d2efba03
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SSDEEP
196608:0cd0H7QAuBwuWJysVYvsO55kRMPdXVJECGo48RmU/3ZlsPv9IGEQ2elL8CZieC5O:G7QAUWJO5kRCXVmrotN3ZW+yCb9gi
Malware Config
Signatures
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Detects Pyinstaller 1 IoCs
resource yara_rule sample pyinstaller -
Unsigned PE 1 IoCs
Checks for missing Authenticode signature.
resource 2024-07-03_4fbfbc58870e49724fdfe2f2b04abf5f_ryuk
Files
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2024-07-03_4fbfbc58870e49724fdfe2f2b04abf5f_ryuk.exe windows:5 windows x64 arch:x64
7aa1951517b3b8d38b12f874b66196c9
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
GetModuleFileNameW
GetProcAddress
GetCommandLineW
GetEnvironmentVariableW
SetEnvironmentVariableW
ExpandEnvironmentStringsW
GetTempPathW
WaitForSingleObject
Sleep
SetDllDirectoryW
CreateProcessW
GetStartupInfoW
LoadLibraryExW
CreateDirectoryW
GetShortPathNameW
FormatMessageW
LoadLibraryA
MultiByteToWideChar
WideCharToMultiByte
GetExitCodeProcess
GetLastError
SetEndOfFile
HeapReAlloc
RtlCaptureContext
RtlLookupFunctionEntry
RtlVirtualUnwind
UnhandledExceptionFilter
SetUnhandledExceptionFilter
GetCurrentProcess
TerminateProcess
IsProcessorFeaturePresent
QueryPerformanceCounter
GetCurrentProcessId
GetCurrentThreadId
GetSystemTimeAsFileTime
InitializeSListHead
IsDebuggerPresent
GetModuleHandleW
RtlUnwindEx
SetLastError
EnterCriticalSection
LeaveCriticalSection
DeleteCriticalSection
InitializeCriticalSectionAndSpinCount
TlsAlloc
TlsGetValue
TlsSetValue
TlsFree
FreeLibrary
GetCommandLineA
ReadFile
CreateFileW
GetDriveTypeW
GetFileType
CloseHandle
PeekNamedPipe
SystemTimeToTzSpecificLocalTime
FileTimeToSystemTime
GetFullPathNameW
GetFullPathNameA
RemoveDirectoryW
FindClose
FindFirstFileExW
FindNextFileW
SetStdHandle
SetConsoleCtrlHandler
DeleteFileW
GetStdHandle
WriteFile
ExitProcess
GetModuleHandleExW
GetACP
HeapFree
HeapAlloc
GetConsoleMode
ReadConsoleW
SetFilePointerEx
GetConsoleCP
CompareStringW
LCMapStringW
GetCurrentDirectoryW
FlushFileBuffers
SetEnvironmentVariableA
GetFileAttributesExW
IsValidCodePage
GetOEMCP
GetCPInfo
GetEnvironmentStringsW
FreeEnvironmentStringsW
GetStringTypeW
GetProcessHeap
WriteConsoleW
GetTimeZoneInformation
HeapSize
RaiseException
advapi32
ConvertStringSecurityDescriptorToSecurityDescriptorW
ws2_32
ntohl
Sections
.text Size: 133KB - Virtual size: 133KB
IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ
.rdata Size: 61KB - Virtual size: 61KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
.data Size: 3KB - Virtual size: 60KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
.pdata Size: 7KB - Virtual size: 7KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
.gfids Size: 512B - Virtual size: 172B
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
.rsrc Size: 59KB - Virtual size: 58KB
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
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spammer.pyc