612 lines
31 KiB
Python
612 lines
31 KiB
Python
import os, sys, time, re, math, pefile, json, datetime, mmap
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import numpy as np
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import onnxruntime as ort
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from signify.authenticode.signed_file.pe import SignedPEFile
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from signify.authenticode.verification_result import AuthenticodeVerificationResult
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####################################################################################################
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MODEL_FILE = "model.onnx"
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FEATURE_FILE = "features.json"
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MAX_FILE_SIZE = 4 * 1024 * 1024 * 1024
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####################################################################################################
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class WinTrust:
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@staticmethod
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def verify(file_path):
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if not file_path or not os.path.exists(file_path) or os.path.getsize(file_path) == 0:
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return 0
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try:
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with open(file_path, 'rb') as f:
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with mmap.mmap(f.fileno(), 0, access=mmap.ACCESS_READ) as mm:
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pe = SignedPEFile(mm)
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if not pe.signatures:
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return 0
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status, _ = pe.explain_verify()
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if status == AuthenticodeVerificationResult.OK:
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return 1
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except Exception:
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pass
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return 0
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####################################################################################################
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class FeatureExtractor:
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API_CAT_MAPPING = {
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'ProcessControl': {
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'CreateProcessA', 'CreateProcessW', 'WinExec', 'ShellExecuteA', 'ShellExecuteW',
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'ShellExecuteExW', 'ExitProcess', 'TerminateProcess', 'OpenProcess', 'GetExitCodeProcess',
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'SetThreadPriority', 'GetThreadPriority', 'GetCurrentProcess', 'GetCurrentProcessId',
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'GetModuleFileNameA', 'GetCommandLineA', 'GetModuleFileNameW', 'GetStartupInfoW'
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},
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'Injection': {
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'VirtualAlloc', 'VirtualAllocEx', 'VirtualProtect', 'VirtualProtectEx', 'WriteProcessMemory',
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'ReadProcessMemory', 'CreateRemoteThread', 'QueueUserAPC', 'SetThreadContext', 'GetThreadContext',
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'Wow64SetThreadContext', 'NtUnmapViewOfSection', 'ZwUnmapViewOfSection', 'RtlCreateUserThread',
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'SetWindowsHookExA', 'SetWindowsHookExW', 'UnhookWindowsHookEx', 'LoadLibraryA', 'LoadLibraryW',
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'LoadLibraryExA', 'LoadLibraryExW', 'GetProcAddress', 'GetModuleHandleA', 'GetModuleHandleW',
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'FreeLibrary', 'CreateFileMappingA', 'CreateFileMappingW', 'MapViewOfFile', 'UnmapViewOfSection',
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'VirtualFree', 'VirtualQuery'
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},
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'Synchronization': {
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'WaitForSingleObject', 'WaitForSingleObjectEx', 'WaitForMultipleObjects', 'WaitForMultipleObjectsEx',
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'CreateMutexA', 'CreateMutexW', 'OpenMutexW', 'ReleaseMutex', 'CreateEventA', 'CreateEventW',
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'OpenEventW', 'SetEvent', 'ResetEvent', 'EnterCriticalSection', 'LeaveCriticalSection',
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'InitializeCriticalSection', 'DeleteCriticalSection', 'Sleep', 'SleepEx',
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'InitializeCriticalSectionAndSpinCount', 'InterlockedDecrement', 'InterlockedIncrement',
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'InterlockedExchange', 'InterlockedCompareExchange', 'SetTimer', 'KillTimer'
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},
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'MultiThreading': {
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'CreateThread', 'ResumeThread', 'SuspendThread', 'ExitThread', 'TerminateThread',
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'GetCurrentThread', 'GetCurrentThreadId', 'TlsAlloc', 'TlsSetValue', 'TlsGetValue',
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'CreateThreadpoolWork', 'SubmitThreadpoolWork', 'TlsFree'
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},
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'Network': {
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'socket', 'connect', 'send', 'recv', 'bind', 'listen', 'accept', 'gethostbyname', 'getaddrinfo',
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'WSAStartup', 'WSACleanup', 'WSAIoctl', 'WSASocketA', 'WSASocketW', 'closesocket', 'htons',
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'InternetOpenA', 'InternetOpenW', 'InternetConnectA', 'InternetConnectW', 'InternetOpenUrlA',
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'InternetOpenUrlW', 'HttpOpenRequestA', 'HttpOpenRequestW', 'HttpSendRequestA', 'HttpSendRequestW',
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'InternetReadFile', 'URLDownloadToFileA', 'URLDownloadToFileW', 'DnsQuery_A', 'DnsQuery_W'
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},
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'Encryption': {
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'CryptAcquireContextA', 'CryptAcquireContextW', 'CryptCreateHash', 'CryptHashData',
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'CryptDeriveKey', 'CryptEncrypt', 'CryptDecrypt', 'CryptDestroyKey', 'CryptDestroyHash',
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'CryptReleaseContext', 'CryptGenKey', 'CryptImportKey', 'CryptExportKey'
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},
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'DataObfuscation': {
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'RtlDecompressBuffer', 'MultiByteToWideChar', 'WideCharToMultiByte', 'Base64Decode',
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'CryptDecodeObject', 'IsDBCSLeadByte', 'CharUpperA', 'CharLowerA',
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'GetStringTypeW', 'LCMapStringW', 'IsValidCodePage', 'DecodePointer', 'EncodePointer'
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},
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'FileIO': {
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'CreateFileA', 'CreateFileW', 'WriteFile', 'ReadFile', 'DeleteFileA', 'DeleteFileW',
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'CopyFileA', 'CopyFileW', 'MoveFileA', 'MoveFileW', 'FindFirstFileA', 'FindNextFileA',
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'GetTempPathA', 'GetTempPathW', 'GetTempFileNameA', 'GetTempFileNameW', 'SetFileAttributesA',
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'SetFileAttributesW', 'DeviceIoControl', 'SetFileTime', 'GetFileSize', 'GetFileSizeEx',
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'SetFilePointer', 'FlushFileBuffers', 'ConnectNamedPipe', 'PeekNamedPipe',
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'CloseHandle', 'GetFileType', 'SetStdHandle', 'SetFilePointerEx', 'FindClose',
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'SetHandleCount', 'SetEndOfFile', 'GetFullPathNameA', 'GetFileAttributesA'
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},
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'Registry': {
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'RegOpenKeyExA', 'RegOpenKeyExW', 'RegSetValueExA', 'RegSetValueExW',
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'RegCreateKeyExA', 'RegCreateKeyExW', 'RegDeleteKeyA', 'RegDeleteKeyW',
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'RegEnumValueA', 'RegEnumValueW', 'RegQueryValueExA', 'RegQueryValueExW',
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'RegDeleteValueA', 'RegDeleteValueW', 'RegCloseKey'
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},
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'Services': {
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'OpenSCManagerA', 'OpenSCManagerW', 'CreateServiceA', 'CreateServiceW',
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'StartServiceA', 'StartServiceW', 'ControlService', 'DeleteService'
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},
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'Privileges': {
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'AdjustTokenPrivileges', 'LookupPrivilegeValueA', 'LookupPrivilegeValueW',
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'OpenProcessToken', 'NetUserAdd', 'NetLocalGroupAddMembers', 'IsAdmin',
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'GetUserNameA', 'GetUserNameW'
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},
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'Native': {
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'RtlUnwind', 'RtlVirtualUnwind', 'RtlCaptureContext', 'RtlLookupFunctionEntry',
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'NtClose', 'NtQueryInformationProcess', 'RtlAllocateHeap', 'RtlFreeHeap',
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'GetSystemTimeAsFileTime', 'GetLocalTime', 'GlobalMemoryStatus',
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'GetVersionExA', 'GetVersionExW', 'GetComputerNameA', 'GetComputerNameW',
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'GetLastError', 'GetACP', 'RaiseException', 'SetLastError', 'GetEnvironmentStringsW',
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'FreeEnvironmentStringsW', 'GetLocaleInfoA', 'lstrlenA', 'GetVersion', 'GetSystemInfo',
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'CompareStringA'
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},
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'DotNet': {
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'_CorExeMain', '_CorDllMain'
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},
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'AntiDebug': {
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'IsDebuggerPresent', 'CheckRemoteDebuggerPresent', 'OutputDebugStringA', 'OutputDebugStringW',
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'GetTickCount', 'GetTickCount64', 'QueryPerformanceCounter', 'FindWindowA', 'FindWindowW',
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'EnumWindows', 'EnumChildWindows', 'GetWindowRect', 'GetClientRect', 'SetWindowDisplayAffinity',
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'UnhandledExceptionFilter', 'SetUnhandledExceptionFilter', 'IsProcessorFeaturePresent',
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'SetErrorMode', 'GetTimeZoneInformation', 'GetDriveTypeW', 'GetDiskFreeSpaceA'
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},
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'Keylogging': {
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'GetAsyncKeyState', 'GetKeyState', 'GetKeyboardState', 'MapVirtualKeyA', 'MapVirtualKeyW',
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'ToAscii', 'ToAsciiEx', 'ToUnicode', 'ToUnicodeEx', 'GetKeyNameTextA', 'GetForegroundWindow',
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'KeybdEvent', 'SendInput', 'MapVirtualKeyExA', 'MapVirtualKeyExW', 'CallNextHookEx'
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},
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'Input': {
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'GetCursorPos', 'SetCursorPos', 'MouseEvent', 'GetDoubleClickTime',
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'GetCapture', 'SetCapture'
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},
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'ScreenCapture': {
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'BitBlt', 'StretchBlt', 'GetDC', 'GetWindowDC', 'CreateCompatibleDC', 'CreateCompatibleBitmap',
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'GdipSaveImageToFile', 'PrintWindow', 'GetDesktopWindow', 'CreateDCW', 'CreateDCA',
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'SelectObject', 'DeleteDC', 'DeleteObject', 'GetDeviceCaps', 'GetSystemMetrics'
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},
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'Graphics': {
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'Direct3DCreate9', 'D3D11CreateDevice'
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},
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'Audio': {
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'WaveInOpen', 'WaveInClose', 'WaveInStart', 'WaveInStop'
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},
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'Clipboard': {
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'OpenClipboard', 'CloseClipboard', 'GetClipboardData', 'SetClipboardData'
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},
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'Camera': {
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'CapCreateCaptureWindowA', 'CapCreateCaptureWindowW'
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},
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'Memory': {
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'HeapAlloc', 'HeapFree', 'HeapSize', 'HeapCreate', 'GetProcessHeap',
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'LocalAlloc', 'LocalFree', 'GlobalAlloc', 'GlobalFree', 'GlobalUnlock',
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'HeapDestroy', 'GlobalLock', 'SysFreeString', 'SysAllocStringLen'
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},
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'Resource': {
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'LoadResource', 'SizeofResource', 'LockResource', 'FreeResource', 'FindResourceA'
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},
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'WindowControl': {
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'ShowWindow', 'DestroyWindow', 'TranslateMessage', 'DispatchMessageA', 'GetWindow',
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'PeekMessageA', 'GetWindowLongA', 'CallWindowProcA', 'SetWindowLongA', 'GetWindowTextA',
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'ScreenToClient', 'GetActiveWindow', 'CreateWindowExA', 'DefWindowProcA', 'GetMessageA',
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'RegisterClassA', 'UnregisterClassA', 'MessageBoxA'
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},
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'COM': {
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'CoCreateInstance', 'CoUninitialize', 'CoInitialize'
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}
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}
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TARGET_DLLS = {
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'kernel32.dll', 'user32.dll', 'gdi32.dll', 'advapi32.dll', 'shell32.dll', 'ntdll.dll', 'hal.dll',
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'ws2_32.dll', 'wsock32.dll', 'wininet.dll', 'winhttp.dll', 'urlmon.dll', 'crypt32.dll', 'bcrypt.dll',
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'psapi.dll', 'dbghelp.dll', 'imagehlp.dll', 'shlwapi.dll', 'ole32.dll', 'oleaut32.dll', 'comctl32.dll',
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'mscoree.dll', 'vbscript.dll', 'netapi32.dll', 'iphlpapi.dll', 'wtsapi32.dll', 'version.dll', 'winmm.dll'
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}
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BASE_SCHEMA = [
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"FileEntropy", "SectionMeanEntropy", "IsExe", "IsDll", "IsDriver", "Is64Bit", "Machine", "Magic",
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"CheckSum", "ImageBase", "SizeOfImage", "SizeOfHeaders",
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"Characteristics", "DllCharacteristics", "Subsystem", "LoaderFlags",
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"MajorLinkerVersion", "MinorLinkerVersion", "SizeOfCode",
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"SizeOfInitializedData", "SizeOfUninitializedData", "AddressOfEntryPoint",
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"BaseOfCode", "SectionAlignment", "FileAlignment",
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"MajorOperatingSystemVersion", "MinorOperatingSystemVersion",
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"MajorImageVersion", "MinorImageVersion",
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"MajorSubsystemVersion", "MinorSubsystemVersion",
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"SizeOfStackReserve", "SizeOfStackCommit", "SizeOfHeapReserve", "SizeOfHeapCommit",
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"NumberOfSections", "NumberOfRvaAndSizes", "PointerToSymbolTable", "NumberOfSymbols",
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"SizeOfOptionalHeader",
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"TextSectionMaxEntropy", "TextSectionMeanEntropy", "TextSizeRatio",
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"DataSectionMaxEntropy", "DataSectionMeanEntropy", "DataSizeRatio",
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"RsrcSectionMaxEntropy", "RsrcSectionMeanEntropy", "RsrcSizeRatio",
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"SectionCount", "ExecutableSections",
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"WritableSections", "ReadableSections", "SectionException",
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"Char_00000020_Count", "Char_00000020_MeanEntropy",
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"Char_00000040_Count", "Char_00000040_MeanEntropy",
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"Char_00000080_Count", "Char_00000080_MeanEntropy",
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"Char_02000000_Count", "Char_02000000_MeanEntropy",
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"Char_20000000_Count", "Char_20000000_MeanEntropy",
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"Char_40000000_Count", "Char_40000000_MeanEntropy",
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"Char_80000000_Count", "Char_80000000_MeanEntropy",
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"IconCount", "ApiCount", "ExportCount", "DebugCount", "ExceptionCount",
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"ImportCount", "ImportFunctionCount",
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"FileDescriptionLength", "FileVersionLength", "ProductNameLength",
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"ProductVersionLength", "CompanyNameLength", "LegalCopyrightLength",
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"CommentsLength", "InternalNameLength", "LegalTrademarksLength",
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"SpecialBuildLength", "PrivateBuildLength",
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"TrustSigned", "IsDebug", "IsPatched", "IsPrivateBuild", "IsPreRelease",
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"IsSpecialBuild", "IsAdmin", "IsInstall", "HasTlsCallbacks",
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"HasInvalidTimestamp", "HasRelocationDirectory", "HasPacked", "FileTimeException"
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]
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CAT_SCHEMA = [f"Cat_{k}" for k in sorted(API_CAT_MAPPING.keys())]
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DLL_SCHEMA = [f"Dll_{d.replace('.', '_')}" for d in sorted(TARGET_DLLS)]
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_ALL_APIS = {api for apis in API_CAT_MAPPING.values() for api in apis}
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API_SCHEMA = [f"Api_{api}" for api in sorted(_ALL_APIS)]
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SCHEMA = BASE_SCHEMA + CAT_SCHEMA + DLL_SCHEMA + API_SCHEMA
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_API_TO_CATS = {}
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for _cat, _apis in API_CAT_MAPPING.items():
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for _api in _apis:
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if _api not in _API_TO_CATS:
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_API_TO_CATS[_api] = []
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_API_TO_CATS[_api].append(_cat)
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PACKERS = {
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'upx', 'aspack', 'asprotect', 'pecompact', 'upack', 'fsg', 'mew',
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'mpress', 'ezip', 'pklt', 'shrink', 'petite', 'telock',
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'themida', 'winlicense', 'tmd', 'vmp', 'enigma', 'obsidium',
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'pelock', 'exestealth', 'yoda', 'armadillo', 'zprotect',
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'sforce', 'starforce', 'qihoo', 'wisevec', 'megastop',
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}
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INSTALLER_SIGS = [b"Nullsoft.NSIS", b"Inno Setup", b"7-Zip.7zip", b"InstallShield"]
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####################################################################################################
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@staticmethod
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def _safe_float(val):
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try:
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f = float(val)
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if math.isinf(f) or math.isnan(f): return 0.0
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return f
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except Exception:
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return 0.0
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@staticmethod
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def _calc_entropy(data):
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if not data: return 0.0
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arr = np.frombuffer(data, dtype=np.uint8)
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counts = np.bincount(arr, minlength=256)
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probs = counts[counts > 0] / len(arr)
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return float(-np.sum(probs * np.log2(probs)))
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@staticmethod
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def _safe_div(n, d):
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return float(n) / d if d > 0 else 0.0
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####################################################################################################
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@classmethod
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def extract(cls, file_path):
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fts = {k: 0.0 for k in cls.SCHEMA}
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pe = None
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try:
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fsize = os.path.getsize(file_path)
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if fsize == 0 or fsize > MAX_FILE_SIZE:
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return None
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with open(file_path, "rb") as f:
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file_bytes = f.read()
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pe = pefile.PE(data=file_bytes, fast_load=True)
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fts['TrustSigned'] = WinTrust.verify(file_path)
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fh = pe.FILE_HEADER
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fts['Machine'] = fh.Machine
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fts['NumberOfSections'] = fh.NumberOfSections
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fts['TimeDateStamp'] = fh.TimeDateStamp
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fts['PointerToSymbolTable'] = fh.PointerToSymbolTable
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fts['NumberOfSymbols'] = fh.NumberOfSymbols
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fts['SizeOfOptionalHeader'] = fh.SizeOfOptionalHeader
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fts['Characteristics'] = fh.Characteristics
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curr_ts = datetime.datetime.utcnow().timestamp()
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fts['HasInvalidTimestamp'] = 1 if (fh.TimeDateStamp < 631152000 or fh.TimeDateStamp > curr_ts + 2592000) else 0
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fts['FileTimeException'] = 1 if fh.TimeDateStamp == 0 else 0
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if hasattr(pe, 'OPTIONAL_HEADER'):
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op = pe.OPTIONAL_HEADER
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fts['Magic'] = getattr(op, 'Magic', 0)
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fts['MajorLinkerVersion'] = getattr(op, 'MajorLinkerVersion', 0)
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fts['MinorLinkerVersion'] = getattr(op, 'MinorLinkerVersion', 0)
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fts['SizeOfCode'] = getattr(op, 'SizeOfCode', 0)
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fts['SizeOfInitializedData'] = getattr(op, 'SizeOfInitializedData', 0)
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fts['SizeOfUninitializedData'] = getattr(op, 'SizeOfUninitializedData', 0)
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fts['AddressOfEntryPoint'] = getattr(op, 'AddressOfEntryPoint', 0)
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fts['BaseOfCode'] = getattr(op, 'BaseOfCode', 0)
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fts['ImageBase'] = getattr(op, 'ImageBase', 0)
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fts['SectionAlignment'] = getattr(op, 'SectionAlignment', 0)
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fts['FileAlignment'] = getattr(op, 'FileAlignment', 0)
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fts['MajorOperatingSystemVersion'] = getattr(op, 'MajorOperatingSystemVersion', 0)
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fts['MinorOperatingSystemVersion'] = getattr(op, 'MinorOperatingSystemVersion', 0)
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fts['MajorImageVersion'] = getattr(op, 'MajorImageVersion', 0)
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fts['MinorImageVersion'] = getattr(op, 'MinorImageVersion', 0)
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fts['MajorSubsystemVersion'] = getattr(op, 'MajorSubsystemVersion', 0)
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fts['MinorSubsystemVersion'] = getattr(op, 'MinorSubsystemVersion', 0)
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fts['SizeOfImage'] = getattr(op, 'SizeOfImage', 0)
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fts['SizeOfHeaders'] = getattr(op, 'SizeOfHeaders', 0)
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fts['CheckSum'] = getattr(op, 'CheckSum', 0)
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fts['Subsystem'] = getattr(op, 'Subsystem', 0)
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fts['DllCharacteristics'] = getattr(op, 'DllCharacteristics', 0)
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fts['SizeOfStackReserve'] = getattr(op, 'SizeOfStackReserve', 0)
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fts['SizeOfStackCommit'] = getattr(op, 'SizeOfStackCommit', 0)
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fts['SizeOfHeapReserve'] = getattr(op, 'SizeOfHeapReserve', 0)
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fts['SizeOfHeapCommit'] = getattr(op, 'SizeOfHeapCommit', 0)
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fts['LoaderFlags'] = getattr(op, 'LoaderFlags', 0)
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fts['NumberOfRvaAndSizes'] = getattr(op, 'NumberOfRvaAndSizes', 0)
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fts['Is64Bit'] = 1 if fh.Machine in (0x8664, 0xAA64, 0x0200) else 0
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fts['IsExe'] = 1 if pe.is_exe() else 0
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fts['IsDll'] = 1 if pe.is_dll() else 0
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fts['IsDriver'] = 1 if fts['Subsystem'] == 1 else 0
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if hasattr(op, 'DATA_DIRECTORY'):
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reloc_idx = pefile.DIRECTORY_ENTRY.get('IMAGE_DIRECTORY_ENTRY_BASERELOC', 5)
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if len(op.DATA_DIRECTORY) > reloc_idx and op.DATA_DIRECTORY[reloc_idx].Size > 0:
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fts['HasRelocationDirectory'] = 1
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try:
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fts['FileEntropy'] = cls._calc_entropy(file_bytes)
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except Exception:
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pass
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sec_entropies = []
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text_entropies = []
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data_entropies = []
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rsrc_entropies = []
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char_flags = [0x00000020, 0x00000040, 0x00000080, 0x02000000, 0x20000000, 0x40000000, 0x80000000]
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if hasattr(pe, 'sections'):
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fts['SectionCount'] = len(pe.sections)
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for section in pe.sections:
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try:
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name = section.Name.decode('ascii', 'ignore').strip('\x00')
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except Exception:
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name = ""
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try:
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s_data = section.get_data()
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s_entropy = cls._calc_entropy(s_data)
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except Exception:
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s_data = b""
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s_entropy = 0.0
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sec_entropies.append(s_entropy)
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if any(p in name.lower() for p in cls.PACKERS): fts['HasPacked'] = 1
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if section.Characteristics & 0x20000000: fts['ExecutableSections'] += 1
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if section.Characteristics & 0x80000000: fts['WritableSections'] += 1
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if section.Characteristics & 0x40000000: fts['ReadableSections'] += 1
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if section.SizeOfRawData + section.PointerToRawData > fsize: fts['SectionException'] = 1
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for flag in char_flags:
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if section.Characteristics & flag:
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fts[f'Char_{flag:08X}_Count'] += 1
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fts[f'Char_{flag:08X}_MeanEntropy'] += s_entropy
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ratio = cls._safe_div(section.SizeOfRawData, fsize)
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if name.startswith('.text'):
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text_entropies.append(s_entropy)
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fts['TextSizeRatio'] += ratio
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elif name.startswith('.data'):
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data_entropies.append(s_entropy)
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fts['DataSizeRatio'] += ratio
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elif name.startswith('.rsrc'):
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rsrc_entropies.append(s_entropy)
|
|
fts['RsrcSizeRatio'] += ratio
|
|
if b"requireAdministrator" in s_data: fts['IsAdmin'] = 1
|
|
for sig in cls.INSTALLER_SIGS:
|
|
if sig in s_data:
|
|
fts['IsInstall'] = 1
|
|
break
|
|
|
|
fts['SectionMeanEntropy'] = cls._safe_div(sum(sec_entropies), len(sec_entropies))
|
|
fts['TextSectionMaxEntropy'] = max(text_entropies) if text_entropies else 0.0
|
|
fts['TextSectionMeanEntropy'] = cls._safe_div(sum(text_entropies), len(text_entropies))
|
|
fts['DataSectionMaxEntropy'] = max(data_entropies) if data_entropies else 0.0
|
|
fts['DataSectionMeanEntropy'] = cls._safe_div(sum(data_entropies), len(data_entropies))
|
|
fts['RsrcSectionMaxEntropy'] = max(rsrc_entropies) if rsrc_entropies else 0.0
|
|
fts['RsrcSectionMeanEntropy'] = cls._safe_div(sum(rsrc_entropies), len(rsrc_entropies))
|
|
|
|
for flag in char_flags:
|
|
fts[f'Char_{flag:08X}_MeanEntropy'] = cls._safe_div(fts[f'Char_{flag:08X}_MeanEntropy'], fts[f'Char_{flag:08X}_Count'])
|
|
|
|
try:
|
|
pe.parse_data_directories(directories=[
|
|
pefile.DIRECTORY_ENTRY['IMAGE_DIRECTORY_ENTRY_IMPORT'],
|
|
pefile.DIRECTORY_ENTRY['IMAGE_DIRECTORY_ENTRY_EXPORT'],
|
|
pefile.DIRECTORY_ENTRY['IMAGE_DIRECTORY_ENTRY_RESOURCE'],
|
|
pefile.DIRECTORY_ENTRY['IMAGE_DIRECTORY_ENTRY_DEBUG'],
|
|
pefile.DIRECTORY_ENTRY['IMAGE_DIRECTORY_ENTRY_TLS']
|
|
])
|
|
except Exception:
|
|
pass
|
|
|
|
if hasattr(pe, 'DIRECTORY_ENTRY_TLS') and hasattr(pe.DIRECTORY_ENTRY_TLS, 'struct'):
|
|
if getattr(pe.DIRECTORY_ENTRY_TLS.struct, 'AddressOfCallBacks', 0) != 0:
|
|
fts['HasTlsCallbacks'] = 1
|
|
|
|
if hasattr(pe, 'VS_FIXEDFILEINFO') and len(pe.VS_FIXEDFILEINFO) > 0:
|
|
flags = getattr(pe.VS_FIXEDFILEINFO[0], 'FileFlags', 0)
|
|
fts['IsDebug'] = 1 if flags & 0x1 else 0
|
|
fts['IsPreRelease'] = 1 if flags & 0x2 else 0
|
|
fts['IsPatched'] = 1 if flags & 0x4 else 0
|
|
fts['IsPrivateBuild'] = 1 if flags & 0x8 else 0
|
|
fts['IsSpecialBuild'] = 1 if flags & 0x20 else 0
|
|
|
|
if hasattr(pe, 'FileInfo'):
|
|
for fileinfo_list in pe.FileInfo:
|
|
for fileinfo in fileinfo_list:
|
|
if getattr(fileinfo, 'name', '') in ('StringFileInfo', b'StringFileInfo'):
|
|
for st in getattr(fileinfo, 'StringTable', []):
|
|
for key, val in st.entries.items():
|
|
try:
|
|
k = key.decode('utf-8', 'ignore') if isinstance(key, bytes) else str(key)
|
|
v = val.decode('utf-8', 'ignore') if isinstance(val, bytes) else str(val)
|
|
length = len(v)
|
|
if k == 'FileDescription': fts['FileDescriptionLength'] = length
|
|
elif k == 'FileVersion': fts['FileVersionLength'] = length
|
|
elif k == 'ProductName': fts['ProductNameLength'] = length
|
|
elif k == 'ProductVersion': fts['ProductVersionLength'] = length
|
|
elif k == 'CompanyName': fts['CompanyNameLength'] = length
|
|
elif k == 'LegalCopyright': fts['LegalCopyrightLength'] = length
|
|
elif k == 'Comments': fts['CommentsLength'] = length
|
|
elif k == 'InternalName': fts['InternalNameLength'] = length
|
|
elif k == 'LegalTrademarks': fts['LegalTrademarksLength'] = length
|
|
elif k == 'SpecialBuild': fts['SpecialBuildLength'] = length
|
|
elif k == 'PrivateBuild': fts['PrivateBuildLength'] = length
|
|
except Exception:
|
|
continue
|
|
|
|
if hasattr(pe, 'DIRECTORY_ENTRY_IMPORT'):
|
|
fts['ImportCount'] = len(pe.DIRECTORY_ENTRY_IMPORT)
|
|
for entry in pe.DIRECTORY_ENTRY_IMPORT:
|
|
if getattr(entry, 'dll', None):
|
|
try:
|
|
dll_name = entry.dll.decode('ascii', 'ignore').lower()
|
|
if dll_name in cls.TARGET_DLLS:
|
|
fts[f"Dll_{dll_name.replace('.', '_')}"] = 1.0
|
|
except Exception:
|
|
pass
|
|
|
|
imports = getattr(entry, 'imports', [])
|
|
for imp in imports:
|
|
fts['ImportFunctionCount'] += 1
|
|
if not getattr(imp, 'name', None): continue
|
|
try:
|
|
func_name = imp.name.decode('ascii', 'ignore')
|
|
if func_name in cls._ALL_APIS:
|
|
fts[f'Api_{func_name}'] += 1
|
|
fts['ApiCount'] += 1
|
|
for cat in cls._API_TO_CATS.get(func_name, []):
|
|
fts[f'Cat_{cat}'] += 1
|
|
except Exception:
|
|
continue
|
|
|
|
if hasattr(pe, 'DIRECTORY_ENTRY_EXPORT') and hasattr(pe.DIRECTORY_ENTRY_EXPORT, 'symbols'):
|
|
fts['ExportCount'] = len(pe.DIRECTORY_ENTRY_EXPORT.symbols)
|
|
|
|
if hasattr(pe, 'DIRECTORY_ENTRY_RESOURCE'):
|
|
for entry in pe.DIRECTORY_ENTRY_RESOURCE.entries:
|
|
if getattr(entry, 'id', None) == 3 and hasattr(entry, 'directory'):
|
|
fts['IconCount'] += len(getattr(entry.directory, 'entries', []))
|
|
|
|
if hasattr(pe, 'OPTIONAL_HEADER') and hasattr(pe.OPTIONAL_HEADER, 'DATA_DIRECTORY') and len(pe.OPTIONAL_HEADER.DATA_DIRECTORY) > 3:
|
|
exc_dir = pe.OPTIONAL_HEADER.DATA_DIRECTORY[3]
|
|
if exc_dir.Size > 0:
|
|
fts['ExceptionCount'] = exc_dir.Size // 12 if fts['Machine'] in (0x8664, 0xAA64) else 0
|
|
|
|
if hasattr(pe, 'DIRECTORY_ENTRY_DEBUG'):
|
|
fts['DebugCount'] = len(pe.DIRECTORY_ENTRY_DEBUG)
|
|
|
|
for k in fts:
|
|
fts[k] = cls._safe_float(fts[k])
|
|
|
|
return fts
|
|
|
|
except Exception:
|
|
return None
|
|
finally:
|
|
if pe:
|
|
pe.close()
|
|
|
|
####################################################################################################
|
|
|
|
class ModelPredictor:
|
|
def __init__(self, model_path, feature_path):
|
|
self.sess = None
|
|
self.input_name = None
|
|
self.feature_order = []
|
|
self.model_features = self._load_features(feature_path)
|
|
self._load_model(model_path)
|
|
self._build_input_map()
|
|
|
|
def _load_features(self, path):
|
|
if os.path.exists(path):
|
|
try:
|
|
with open(path, 'r') as f:
|
|
return json.load(f)
|
|
except Exception:
|
|
pass
|
|
return [re.sub(r'[^A-Za-z0-9_]+', '', f) for f in FeatureExtractor.SCHEMA]
|
|
|
|
def _load_model(self, model_path):
|
|
if not os.path.exists(model_path):
|
|
raise FileNotFoundError(f"Model missing: {model_path}")
|
|
|
|
self.sess = ort.InferenceSession(model_path, providers=['CPUExecutionProvider'])
|
|
model_inputs = self.sess.get_inputs()
|
|
self.input_name = model_inputs[0].name
|
|
expected_dim = model_inputs[0].shape[1]
|
|
|
|
current_dim = len(self.model_features)
|
|
if current_dim != expected_dim:
|
|
raise ValueError(f"Dimension Mismatch: Expected {expected_dim}, got {current_dim}.")
|
|
|
|
def _build_input_map(self):
|
|
local_map = {re.sub(r'[^A-Za-z0-9_]+', '', raw_name): raw_name for raw_name in FeatureExtractor.SCHEMA}
|
|
self.feature_order = [local_map.get(req_feat) for req_feat in self.model_features]
|
|
|
|
def predict(self, raw_data):
|
|
vec_data = [raw_data.get(key, 0.0) if key else 0.0 for key in self.feature_order]
|
|
vec = np.array(vec_data, dtype=np.float32).reshape(1, -1)
|
|
outputs = self.sess.run(None, {self.input_name: vec})
|
|
|
|
if len(outputs) > 1:
|
|
result = outputs[1]
|
|
if isinstance(result, list) and len(result) > 0:
|
|
prob_dict = result[0]
|
|
if hasattr(prob_dict, 'get'):
|
|
return float(prob_dict.get(1, prob_dict.get('1', 0.0)))
|
|
elif isinstance(result, np.ndarray):
|
|
if result.ndim == 2 and result.shape[1] > 1:
|
|
return float(result[0][1])
|
|
return 0.0
|
|
|
|
####################################################################################################
|
|
|
|
def get_threat_name(prob_float):
|
|
prob_pct = min(int(prob_float * 100), 99)
|
|
|
|
if prob_pct >= 80:
|
|
return f"General:WinPE/Malware.{prob_pct}!ml"
|
|
elif prob_pct >= 50:
|
|
return f"General:WinPE/Suspicious.{prob_pct}!ml"
|
|
else:
|
|
return "Undetected"
|
|
|
|
def scan_target(target, predictor):
|
|
if not os.path.exists(target):
|
|
print(json.dumps({"result": "error", "prob": 0.0, "file": target, "details": "Path not found"}))
|
|
sys.stdout.flush()
|
|
return
|
|
|
|
try:
|
|
data = FeatureExtractor.extract(target)
|
|
if not data:
|
|
print(json.dumps({"result": "error", "prob": 0.0, "file": target, "details": "Extraction failed"}))
|
|
sys.stdout.flush()
|
|
return
|
|
|
|
prob = predictor.predict(data)
|
|
label = get_threat_name(prob)
|
|
|
|
print(json.dumps({"result": label, "prob": round(prob, 4), "file": target}))
|
|
sys.stdout.flush()
|
|
|
|
except Exception as e:
|
|
print(json.dumps({"result": "error", "prob": 0.0, "file": target, "details": str(e)}))
|
|
sys.stdout.flush()
|
|
|
|
####################################################################################################
|
|
|
|
if __name__ == "__main__":
|
|
base_dir = os.path.dirname(sys.executable) if getattr(sys, 'frozen', False) else os.path.dirname(os.path.abspath(__file__))
|
|
model_path = os.path.join(base_dir, MODEL_FILE)
|
|
feature_path = os.path.join(base_dir, FEATURE_FILE)
|
|
|
|
try:
|
|
predictor = ModelPredictor(model_path, feature_path)
|
|
except Exception as e:
|
|
print(json.dumps({"result": "fatal", "details": str(e)}))
|
|
sys.stdout.flush()
|
|
sys.exit(1)
|
|
|
|
if len(sys.argv) > 1:
|
|
for path in sys.argv[1:]:
|
|
scan_target(path.strip(), predictor)
|
|
else:
|
|
for line in sys.stdin:
|
|
target = line.strip()
|
|
if not target or target.lower() in ['q', 'exit']:
|
|
break
|
|
scan_target(target, predictor)
|