Behavioral task
behavioral1
Sample
Bootstraper.exe
Resource
win7-20240903-en
Behavioral task
behavioral2
Sample
Bootstraper.exe
Resource
win10v2004-20241007-en
General
-
Target
Bootstraper.exe
-
Size
72.1MB
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MD5
2ac637855651012ed522385e1099753d
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SHA1
1f4e9db25fd9a95b6bd92c58518e8da242691316
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SHA256
f00acb22d462f26c98c9390a795848dfd3dd49f2d8e7699dfaa2dbec7506969f
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SHA512
c29e54c73f5ff2fc69bce3a81df68ddb43bf5909aa2378804f51fc61021829af46f457d21eaccdfa48893235288403b23f9028d8ceac8613b9131654de95f1f9
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SSDEEP
393216:warluWuIO7+48bIvGIkGncM9XRTGw6tADv8i1L4GPTsmUzqOL3EfDa32H628Xb:Y796Kku3Z6eDv8SP4EfDa32a2S
Malware Config
Signatures
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Detect Pysilon 1 IoCs
resource yara_rule sample pysilon -
Pysilon family
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Unsigned PE 1 IoCs
Checks for missing Authenticode signature.
resource Bootstraper.exe
Files
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Bootstraper.exe.exe windows:6 windows x64 arch:x64
cdc73ac5c61aadbd73253b59a73b05bd
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
python312
PyExc_NameError
PyExc_EnvironmentError
PyExc_IOError
PyFilter_Type
PyRange_Type
PyExc_WindowsError
PyObject_GetAttr
PyExc_MemoryError
PyFrozenSet_Type
PyClassMethod_Type
PyExc_TimeoutError
PyExc_NotADirectoryError
PyComplex_Type
PySet_Type
PyExc_BlockingIOError
PyNumber_Positive
PySuper_Type
PyExc_FloatingPointError
PyExc_ConnectionRefusedError
PyStatus_Exception
PyWideStringList_Append
PyConfig_SetString
PyConfig_SetArgv
PyThreadState_Get
PyErr_SetInterrupt
PyLong_AsLong
PyList_Size
PyList_SetSlice
PyDict_DelItemString
Py_SetProgramName
Py_InitializeFromConfig
Py_ExitStatusException
PySys_SetArgv
_PyWarnings_Init
_PyRuntime_Initialize
_PyConfig_InitCompatConfig
Py_DebugFlag
Py_VerboseFlag
Py_InteractiveFlag
Py_InspectFlag
Py_OptimizeFlag
Py_NoSiteFlag
Py_BytesWarningFlag
Py_FrozenFlag
Py_IgnoreEnvironmentFlag
Py_DontWriteBytecodeFlag
Py_NoUserSiteDirectory
Py_UTF8Mode
PyImport_FrozenModules
PyMem_Malloc
PyMem_Free
PyMem_GetAllocator
PyObject_GetBuffer
PyBuffer_Release
PyType_Ready
PyObject_Str
PyObject_RichCompare
PyObject_RichCompareBool
PyObject_SetAttrString
PyObject_SelfIter
PyObject_GenericSetAttr
PyObject_IsTrue
PyCallable_Check
PyObject_ClearWeakRefs
_Py_Dealloc
PyObject_Realloc
PyObject_Free
PyObject_Init
_PyObject_New
_PyObject_GC_Resize
PyObject_GC_Del
PyByteArray_FromStringAndSize
PyBytes_FromString
PyBytes_AsString
_PyBytes_Resize
PyUnicode_FromStringAndSize
PyUnicode_FromEncodedObject
PyUnicode_InternInPlace
PyUnicode_FromWideChar
PyUnicode_AsWideCharString
PyUnicode_FromOrdinal
PyUnicode_DecodeUTF8
PyUnicode_Concat
PyUnicode_FindChar
PyUnicode_RichCompare
PyUnicode_Format
PyUnicode_New
PyUnicode_AsUTF8
PyErr_ExceptionMatches
PyErr_BadArgument
PyErr_NoMemory
PyErr_SetFromErrno
PyOS_snprintf
_PyErr_FormatFromCause
PyExc_KeyboardInterrupt
PyLong_AsLongAndOverflow
PyLong_AsSsize_t
PyLong_FromString
PyLong_FromUnicodeObject
_PyLong_New
_PyLong_Copy
PyFloat_FromString
PyFloat_FromDouble
PyComplex_FromDoubles
PyTuple_New
_PyTuple_MaybeUntrack
PyList_New
PyList_Append
PyList_Sort
PyDict_New
PyDict_GetItem
PyDict_GetItemString
PyDict_SetItemString
_PyDict_MaybeUntrack
_PySet_NextEntry
PyCMethod_New
PyModule_NewObject
PyModule_GetName
PyModule_GetFilenameObject
PyModule_GetDef
PyUnstable_Code_NewWithPosOnlyArgs
PyCode_Addr2Line
PyErr_WarnEx
_PyWeakref_ClearRef
PyArg_ParseTuple
PyArg_ParseTupleAndKeywords
PyArg_UnpackTuple
Py_BuildValue
PyModule_ExecDef
PyModule_FromDefAndSpec2
_PyArg_NoKeywords
PyErr_Print
Py_CompileStringExFlags
PyEval_EvalCodeEx
PyEval_GetFuncName
PyEval_RestoreThread
_PyEval_EvalFrameDefault
PySys_WriteStderr
PyImport_ExecCodeModule
PyImport_ExecCodeModuleEx
PyImport_GetModuleDict
PyImport_ImportModule
PyImport_ImportFrozenModule
_PyImport_FixupExtensionObject
PyObject_Call
PyObject_CallFunction
PyObject_CallFunctionObjArgs
PyObject_CallMethodObjArgs
PyObject_GetIter
PyIter_Next
PyIter_Send
PyNumber_Add
PyNumber_Subtract
PyNumber_FloorDivide
PyNumber_Float
PyNumber_InPlaceAdd
PyNumber_InPlaceLshift
PyNumber_InPlaceOr
PyNumber_ToBase
PySequence_List
PySequence_InPlaceConcat
PyMapping_Check
PyObject_LengthHint
PyMarshal_ReadObjectFromString
_PyErr_ChainStackItem
_PyErr_NormalizeException
_PyByteArray_empty_string
PyExc_UnboundLocalError
PyExc_ImportWarning
PyDictKeys_Type
PyDictValues_Type
PyDictItems_Type
PyModuleDef_Type
PyFunction_Type
PyMethod_Type
PyCode_Type
PyFrame_Type
PyTraceBack_Type
PyEllipsis_Type
PyCallIter_Type
PyGen_Type
PyCoro_Type
PyAsyncGen_Type
_PyAsyncGenWrappedValue_Type
Py_GenericAliasType
_PyWeakref_RefType
_PyWeakref_ProxyType
_PyWeakref_CallableProxyType
_PyRuntime
PySlice_Type
PyExc_UnicodeEncodeError
PyExc_LookupError
PyExc_OverflowError
PyExc_ConnectionResetError
PyFrozenSet_New
PyExc_ConnectionError
_Py_EllipsisObject
PyExc_SystemExit
PyExc_StopAsyncIteration
_PySet_Update
PyDict_Update
_PyObject_FunctionStr
PyExc_ModuleNotFoundError
PyObject_Dir
PyBool_Type
PyExc_UnicodeError
PyZip_Type
PyExc_ZeroDivisionError
PyExc_FileNotFoundError
PyReversed_Type
PyNumber_Invert
PyFloat_Type
PyExc_UnicodeDecodeError
PyDict_Type
PyExc_PermissionError
PyExc_RuntimeError
PyExc_ImportError
_Py_NotImplementedStruct
PySet_Contains
PyDict_DelItem
PyLong_FromVoidPtr
PySet_Add
PySet_New
PyDict_MergeFromSeq2
PyDict_Merge
PyMap_Type
PyProperty_Type
PyByteArray_Type
PyObject_DelItem
PyObject_SetAttr
PyBytes_Type
PyExc_EOFError
PyMemoryView_Type
PyExc_Exception
PyExc_BaseException
PyNumber_Negative
PyExc_NotImplementedError
PyEnum_Type
PyExc_SyntaxError
PyExc_GeneratorExit
PyLong_Type
PyObject_IsSubclass
PySequence_Tuple
PyNumber_Long
Py_Exit
_PyDict_NewPresized
PyErr_WriteUnraisable
PySeqIter_Type
PyModule_Type
PyList_Type
PyTuple_Type
PyExc_ValueError
PyExc_KeyError
PyExc_IndexError
PyExc_OSError
PyExc_AssertionError
PyExc_StopIteration
PyUnicode_Type
_PyThreadState_GetCurrent
PySequence_Contains
PySequence_Check
PyNumber_AsSsize_t
PyObject_SetItem
PyObject_GetItem
PyEval_AcquireThread
PyEval_SaveThread
Py_MakePendingCalls
PyErr_PrintEx
Py_GenericAlias
PyModule_GetDict
PyDict_SetItem
PyLong_FromSsize_t
PyUnicode_Find
PyUnicode_Join
PyUnicode_FromFormat
PyUnicode_GetLength
PyUnicode_Substring
PyByteArray_FromObject
PyObject_GetAttrString
PyObject_Repr
PyType_IsSubtype
PyCFunction_Type
PyExc_TypeError
PyExc_SystemError
PyExc_AttributeError
_Py_NoneStruct
PyBaseObject_Type
PyType_Type
PyObject_IsInstance
PyErr_Format
_PyType_Lookup
_Py_TrueStruct
_Py_FalseStruct
PySys_SetObject
PySys_GetObject
PyStructSequence_New
PyStructSequence_InitType
PyCapsule_New
PyUnicode_FromString
_PyErr_WriteUnraisableMsg
kernel32
WriteConsoleW
HeapReAlloc
HeapSize
SetFilePointerEx
GetFileSizeEx
GetConsoleMode
GetConsoleOutputCP
FlushFileBuffers
GetProcessHeap
GetStringTypeW
FreeEnvironmentStringsW
GetEnvironmentStringsW
GetCPInfo
GetOEMCP
GetACP
IsValidCodePage
FindNextFileW
FindFirstFileExW
FindClose
MultiByteToWideChar
GetFileType
LCMapStringW
CompareStringW
FlsFree
FlsSetValue
FlsGetValue
FlsAlloc
HeapFree
HeapAlloc
GetStdHandle
GetCommandLineW
GetCommandLineA
SetConsoleCtrlHandler
GetModuleHandleExW
RtlPcToFileHeader
RaiseException
EncodePointer
FreeLibrary
TlsFree
TlsSetValue
TlsGetValue
TlsAlloc
InitializeCriticalSectionAndSpinCount
DeleteCriticalSection
LeaveCriticalSection
EnterCriticalSection
SetLastError
RtlUnwindEx
GetEnvironmentVariableA
GetModuleHandleW
GetStartupInfoW
IsDebuggerPresent
InitializeSListHead
GetCurrentThreadId
QueryPerformanceCounter
IsProcessorFeaturePresent
TerminateProcess
GetCurrentProcess
SetUnhandledExceptionFilter
UnhandledExceptionFilter
RtlVirtualUnwind
RtlLookupFunctionEntry
RtlCaptureContext
WideCharToMultiByte
FindResourceA
FormatMessageA
LockResource
LoadResource
LoadLibraryExW
GetProcAddress
GetModuleHandleA
GetModuleFileNameW
GetSystemTimeAsFileTime
GetCurrentProcessId
SetErrorMode
WriteFile
GetShortPathNameW
CreateFileW
SetEnvironmentVariableW
GetEnvironmentVariableW
SetDllDirectoryW
OpenProcess
CreateThread
ExitProcess
Sleep
WaitForSingleObject
GetLastError
CloseHandle
SetStdHandle
Sections
.text Size: 55.1MB - Virtual size: 55.1MB
IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ
.rdata Size: 611KB - Virtual size: 610KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
.data Size: 103KB - Virtual size: 1.7MB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
.pdata Size: 588KB - Virtual size: 587KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
.rsrc Size: 15.7MB - Virtual size: 15.7MB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
.reloc Size: 7KB - Virtual size: 7KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ