【Python】反编译PyInstaller打包的exe

查看exe基本信息

需要反编译的exe

查看exe文件的打包工具，查看exe信息的软件叫Detect It Easy(查壳工具)

由图我们可以看出当前选中的exe文件是由名叫PyInstaller的打包工具打包好的exe

反编译

exe反编译工具：pyinstxtractor.py

使用方法

python pyinstxtractor.py XXXXX.exe

反编译工具内容，读者只需要将其复制粘贴即可用，并命名为pyinstxtractor.py

"""
PyInstaller Extractor v2.0 (Supports pyinstaller 6.3.0, 6.2.0, 6.1.0, 6.0.0, 5.13.2, 5.13.1, 5.13.0, 5.12.0, 5.11.0, 5.10.1, 5.10.0, 5.9.0, 5.8.0, 5.7.0, 5.6.2, 5.6.1, 5.6, 5.5, 5.4.1, 5.4, 5.3, 5.2, 5.1, 5.0.1, 5.0, 4.10, 4.9, 4.8, 4.7, 4.6, 4.5.1, 4.5, 4.4, 4.3, 4.2, 4.1, 4.0, 3.6, 3.5, 3.4, 3.3, 3.2, 3.1, 3.0, 2.1, 2.0)
Author : Extreme Coders
E-mail : extremecoders(at)hotmail(dot)com
Web    : https://0xec.blogspot.com
Date   : 26-March-2020
Url    : https://github.com/extremecoders-re/pyinstxtractorFor any suggestions, leave a comment on
https://forum.tuts4you.com/topic/34455-pyinstaller-extractor/This script extracts a pyinstaller generated executable file.
Pyinstaller installation is not needed. The script has it all.For best results, it is recommended to run this script in the
same version of python as was used to create the executable.
This is just to prevent unmarshalling errors(if any) while
extracting the PYZ archive.Usage : Just copy this script to the directory where your exe residesand run the script with the exe file name as a parameterC:\\path\\to\\exe\\>python pyinstxtractor.py <filename>
$ /path/to/exe/python pyinstxtractor.py <filename>Licensed under GNU General Public License (GPL) v3.
You are free to modify this source.CHANGELOG
================================================Version 1.1 (Jan 28, 2014)
-------------------------------------------------
- First Release
- Supports only pyinstaller 2.0Version 1.2 (Sept 12, 2015)
-------------------------------------------------
- Added support for pyinstaller 2.1 and 3.0 dev
- Cleaned up code
- Script is now more verbose
- Executable extracted within a dedicated sub-directory(Support for pyinstaller 3.0 dev is experimental)Version 1.3 (Dec 12, 2015)
-------------------------------------------------
- Added support for pyinstaller 3.0 final
- Script is compatible with both python 2.x & 3.x (Thanks to Moritz Kroll @ Avira Operations GmbH & Co. KG)Version 1.4 (Jan 19, 2016)
-------------------------------------------------
- Fixed a bug when writing pyc files >= version 3.3 (Thanks to Daniello Alto: https://github.com/Djamana)Version 1.5 (March 1, 2016)
-------------------------------------------------
- Added support for pyinstaller 3.1 (Thanks to Berwyn Hoyt for reporting)Version 1.6 (Sept 5, 2016)
-------------------------------------------------
- Added support for pyinstaller 3.2
- Extractor will use a random name while extracting unnamed files.
- For encrypted pyz archives it will dump the contents as is. Previously, the tool would fail.Version 1.7 (March 13, 2017)
-------------------------------------------------
- Made the script compatible with python 2.6 (Thanks to Ross for reporting)Version 1.8 (April 28, 2017)
-------------------------------------------------
- Support for sub-directories in .pyz files (Thanks to Moritz Kroll @ Avira Operations GmbH & Co. KG)Version 1.9 (November 29, 2017)
-------------------------------------------------
- Added support for pyinstaller 3.3
- Display the scripts which are run at entry (Thanks to Michael Gillespie @ malwarehunterteam for the feature request)Version 2.0 (March 26, 2020)
-------------------------------------------------
- Project migrated to github
- Supports pyinstaller 3.6
- Added support for Python 3.7, 3.8
- The header of all extracted pyc's are now automatically fixed
"""from __future__ import print_function
import os
import struct
import marshal
import zlib
import sys
from uuid import uuid4 as uniquenameclass CTOCEntry:def __init__(self, position, cmprsdDataSize, uncmprsdDataSize, cmprsFlag, typeCmprsData, name):self.position = positionself.cmprsdDataSize = cmprsdDataSizeself.uncmprsdDataSize = uncmprsdDataSizeself.cmprsFlag = cmprsFlagself.typeCmprsData = typeCmprsDataself.name = nameclass PyInstArchive:PYINST20_COOKIE_SIZE = 24           # For pyinstaller 2.0PYINST21_COOKIE_SIZE = 24 + 64      # For pyinstaller 2.1+MAGIC = b'MEI\014\013\012\013\016'  # Magic number which identifies pyinstallerdef __init__(self, path):self.filePath = pathself.pycMagic = b'\0' * 4self.barePycList = [] # List of pyc's whose headers have to be fixeddef open(self):try:self.fPtr = open(self.filePath, 'rb')self.fileSize = os.stat(self.filePath).st_sizeexcept:print('[!] Error: Could not open {0}'.format(self.filePath))return Falsereturn Truedef close(self):try:self.fPtr.close()except:passdef checkFile(self):print('[+] Processing {0}'.format(self.filePath))searchChunkSize = 8192endPos = self.fileSizeself.cookiePos = -1if endPos < len(self.MAGIC):print('[!] Error : File is too short or truncated')return Falsewhile True:startPos = endPos - searchChunkSize if endPos >= searchChunkSize else 0chunkSize = endPos - startPosif chunkSize < len(self.MAGIC):breakself.fPtr.seek(startPos, os.SEEK_SET)data = self.fPtr.read(chunkSize)offs = data.rfind(self.MAGIC)if offs != -1:self.cookiePos = startPos + offsbreakendPos = startPos + len(self.MAGIC) - 1if startPos == 0:breakif self.cookiePos == -1:print('[!] Error : Missing cookie, unsupported pyinstaller version or not a pyinstaller archive')return Falseself.fPtr.seek(self.cookiePos + self.PYINST20_COOKIE_SIZE, os.SEEK_SET)if b'python' in self.fPtr.read(64).lower():print('[+] Pyinstaller version: 2.1+')self.pyinstVer = 21     # pyinstaller 2.1+else:self.pyinstVer = 20     # pyinstaller 2.0print('[+] Pyinstaller version: 2.0')return Truedef getCArchiveInfo(self):try:if self.pyinstVer == 20:self.fPtr.seek(self.cookiePos, os.SEEK_SET)# Read CArchive cookie(magic, lengthofPackage, toc, tocLen, pyver) = \struct.unpack('!8siiii', self.fPtr.read(self.PYINST20_COOKIE_SIZE))elif self.pyinstVer == 21:self.fPtr.seek(self.cookiePos, os.SEEK_SET)# Read CArchive cookie(magic, lengthofPackage, toc, tocLen, pyver, pylibname) = \struct.unpack('!8sIIii64s', self.fPtr.read(self.PYINST21_COOKIE_SIZE))except:print('[!] Error : The file is not a pyinstaller archive')return Falseself.pymaj, self.pymin = (pyver//100, pyver%100) if pyver >= 100 else (pyver//10, pyver%10)print('[+] Python version: {0}.{1}'.format(self.pymaj, self.pymin))# Additional data after the cookietailBytes = self.fileSize - self.cookiePos - (self.PYINST20_COOKIE_SIZE if self.pyinstVer == 20 else self.PYINST21_COOKIE_SIZE)# Overlay is the data appended at the end of the PEself.overlaySize = lengthofPackage + tailBytesself.overlayPos = self.fileSize - self.overlaySizeself.tableOfContentsPos = self.overlayPos + tocself.tableOfContentsSize = tocLenprint('[+] Length of package: {0} bytes'.format(lengthofPackage))return Truedef parseTOC(self):# Go to the table of contentsself.fPtr.seek(self.tableOfContentsPos, os.SEEK_SET)self.tocList = []parsedLen = 0# Parse table of contentswhile parsedLen < self.tableOfContentsSize:(entrySize, ) = struct.unpack('!i', self.fPtr.read(4))nameLen = struct.calcsize('!iIIIBc')(entryPos, cmprsdDataSize, uncmprsdDataSize, cmprsFlag, typeCmprsData, name) = \struct.unpack( \'!IIIBc{0}s'.format(entrySize - nameLen), \self.fPtr.read(entrySize - 4))try:name = name.decode("utf-8").rstrip("\0")except UnicodeDecodeError:newName = str(uniquename())print('[!] Warning: File name {0} contains invalid bytes. Using random name {1}'.format(name, newName))name = newName# Prevent writing outside the extraction directoryif name.startswith("/"):name = name.lstrip("/")if len(name) == 0:name = str(uniquename())print('[!] Warning: Found an unamed file in CArchive. Using random name {0}'.format(name))self.tocList.append( \CTOCEntry(                      \self.overlayPos + entryPos, \cmprsdDataSize,             \uncmprsdDataSize,           \cmprsFlag,                  \typeCmprsData,              \name                        \))parsedLen += entrySizeprint('[+] Found {0} files in CArchive'.format(len(self.tocList)))def _writeRawData(self, filepath, data):nm = filepath.replace('\\', os.path.sep).replace('/', os.path.sep).replace('..', '__')nmDir = os.path.dirname(nm)if nmDir != '' and not os.path.exists(nmDir): # Check if path exists, create if notos.makedirs(nmDir)with open(nm, 'wb') as f:f.write(data)def extractFiles(self):print('[+] Beginning extraction...please standby')extractionDir = os.path.join(os.getcwd(), os.path.basename(self.filePath) + '_extracted')if not os.path.exists(extractionDir):os.mkdir(extractionDir)os.chdir(extractionDir)for entry in self.tocList:self.fPtr.seek(entry.position, os.SEEK_SET)data = self.fPtr.read(entry.cmprsdDataSize)if entry.cmprsFlag == 1:try:data = zlib.decompress(data)except zlib.error:print('[!] Error : Failed to decompress {0}'.format(entry.name))continue# Malware may tamper with the uncompressed size# Comment out the assertion in such a caseassert len(data) == entry.uncmprsdDataSize # Sanity Checkif entry.typeCmprsData == b'd' or entry.typeCmprsData == b'o':# d -> ARCHIVE_ITEM_DEPENDENCY# o -> ARCHIVE_ITEM_RUNTIME_OPTION# These are runtime options, not filescontinuebasePath = os.path.dirname(entry.name)if basePath != '':# Check if path exists, create if notif not os.path.exists(basePath):os.makedirs(basePath)if entry.typeCmprsData == b's':# s -> ARCHIVE_ITEM_PYSOURCE# Entry point are expected to be python scriptsprint('[+] Possible entry point: {0}.pyc'.format(entry.name))if self.pycMagic == b'\0' * 4:# if we don't have the pyc header yet, fix them in a later passself.barePycList.append(entry.name + '.pyc')self._writePyc(entry.name + '.pyc', data)elif entry.typeCmprsData == b'M' or entry.typeCmprsData == b'm':# M -> ARCHIVE_ITEM_PYPACKAGE# m -> ARCHIVE_ITEM_PYMODULE# packages and modules are pyc files with their header intact# From PyInstaller 5.3 and above pyc headers are no longer stored# https://github.com/pyinstaller/pyinstaller/commit/a97fdfif data[2:4] == b'\r\n':# < pyinstaller 5.3if self.pycMagic == b'\0' * 4: self.pycMagic = data[0:4]self._writeRawData(entry.name + '.pyc', data)else:# >= pyinstaller 5.3if self.pycMagic == b'\0' * 4:# if we don't have the pyc header yet, fix them in a later passself.barePycList.append(entry.name + '.pyc')self._writePyc(entry.name + '.pyc', data)else:self._writeRawData(entry.name, data)if entry.typeCmprsData == b'z' or entry.typeCmprsData == b'Z':self._extractPyz(entry.name)# Fix bare pyc's if anyself._fixBarePycs()def _fixBarePycs(self):for pycFile in self.barePycList:with open(pycFile, 'r+b') as pycFile:# Overwrite the first four bytespycFile.write(self.pycMagic)def _writePyc(self, filename, data):with open(filename, 'wb') as pycFile:pycFile.write(self.pycMagic)            # pyc magicif self.pymaj >= 3 and self.pymin >= 7:                # PEP 552 -- Deterministic pycspycFile.write(b'\0' * 4)        # BitfieldpycFile.write(b'\0' * 8)        # (Timestamp + size) || hash else:pycFile.write(b'\0' * 4)      # Timestampif self.pymaj >= 3 and self.pymin >= 3:pycFile.write(b'\0' * 4)  # Size parameter added in Python 3.3pycFile.write(data)def _extractPyz(self, name):dirName =  name + '_extracted'# Create a directory for the contents of the pyzif not os.path.exists(dirName):os.mkdir(dirName)with open(name, 'rb') as f:pyzMagic = f.read(4)assert pyzMagic == b'PYZ\0' # Sanity CheckpyzPycMagic = f.read(4) # Python magic valueif self.pycMagic == b'\0' * 4:self.pycMagic = pyzPycMagicelif self.pycMagic != pyzPycMagic:self.pycMagic = pyzPycMagicprint('[!] Warning: pyc magic of files inside PYZ archive are different from those in CArchive')# Skip PYZ extraction if not running under the same python versionif self.pymaj != sys.version_info.major or self.pymin != sys.version_info.minor:print('[!] Warning: This script is running in a different Python version than the one used to build the executable.')print('[!] Please run this script in Python {0}.{1} to prevent extraction errors during unmarshalling'.format(self.pymaj, self.pymin))print('[!] Skipping pyz extraction')return(tocPosition, ) = struct.unpack('!i', f.read(4))f.seek(tocPosition, os.SEEK_SET)try:toc = marshal.load(f)except:print('[!] Unmarshalling FAILED. Cannot extract {0}. Extracting remaining files.'.format(name))returnprint('[+] Found {0} files in PYZ archive'.format(len(toc)))# From pyinstaller 3.1+ toc is a list of tuplesif type(toc) == list:toc = dict(toc)for key in toc.keys():(ispkg, pos, length) = toc[key]f.seek(pos, os.SEEK_SET)fileName = keytry:# for Python > 3.3 some keys are bytes object some are str objectfileName = fileName.decode('utf-8')except:pass# Prevent writing outside dirNamefileName = fileName.replace('..', '__').replace('.', os.path.sep)if ispkg == 1:filePath = os.path.join(dirName, fileName, '__init__.pyc')else:filePath = os.path.join(dirName, fileName + '.pyc')fileDir = os.path.dirname(filePath)if not os.path.exists(fileDir):os.makedirs(fileDir)try:data = f.read(length)data = zlib.decompress(data)except:print('[!] Error: Failed to decompress {0}, probably encrypted. Extracting as is.'.format(filePath))open(filePath + '.encrypted', 'wb').write(data)else:self._writePyc(filePath, data)def main():if len(sys.argv) < 2:print('[+] Usage: pyinstxtractor.py <filename>')else:arch = PyInstArchive(sys.argv[1])if arch.open():if arch.checkFile():if arch.getCArchiveInfo():arch.parseTOC()arch.extractFiles()arch.close()print('[+] Successfully extracted pyinstaller archive: {0}'.format(sys.argv[1]))print('')print('You can now use a python decompiler on the pyc files within the extracted directory')returnarch.close()if __name__ == '__main__':main()

反编译的结果为一个添加后缀_extracted的文件夹

参考文献

GitHub - horsicq/Detect-It-Easy：用于确定 Windows、Linux 和 MacOS 文件类型的程序。

GitHub - extremecoders-re/pyinstxtractor：PyInstaller 提取器

超详细Pyinstaller打包exe+反编译Pyinstaller打包的exe教程+防止反编译教程 - 知乎 (zhihu.com)