阅读量:2
📌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
💻代码
""" 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/pyinstxtractor For 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 resides and run the script with the exe file name as a parameter C:\\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 2.0 Version 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 uniquename class CTOCEntry: def __init__(self, position, cmprsdDataSize, uncmprsdDataSize, cmprsFlag, typeCmprsData, name): self.position = position self.cmprsdDataSize = cmprsdDataSize self.uncmprsdDataSize = uncmprsdDataSize self.cmprsFlag = cmprsFlag self.typeCmprsData = typeCmprsData self.name = name class PyInstArchive: PYINST20_COOKIE_SIZE = 24 # For pyinstaller 2.0 PYINST21_COOKIE_SIZE = 24 + 64 # For pyinstaller 2.1+ MAGIC = b'MEI\014\013\012\013\016' # Magic number which identifies pyinstaller def __init__(self, path): self.filePath = path self.pycMagic = b'\0' * 4 self.barePycList = [] # List of pyc's whose headers have to be fixed def open(self): try: self.fPtr = open(self.filePath, 'rb') self.fileSize = os.stat(self.filePath).st_size except: print('[!] Error: Could not open {0}'.format(self.filePath)) return False return True def close(self): try: self.fPtr.close() except: pass def checkFile(self): print('[+] Processing {0}'.format(self.filePath)) searchChunkSize = 8192 endPos = self.fileSize self.cookiePos = -1 if endPos < len(self.MAGIC): print('[!] Error : File is too short or truncated') return False while True: startPos = endPos - searchChunkSize if endPos >= searchChunkSize else 0 chunkSize = endPos - startPos if chunkSize < len(self.MAGIC): break self.fPtr.seek(startPos, os.SEEK_SET) data = self.fPtr.read(chunkSize) offs = data.rfind(self.MAGIC) if offs != -1: self.cookiePos = startPos + offs break endPos = startPos + len(self.MAGIC) - 1 if startPos == 0: break if self.cookiePos == -1: print('[!] Error : Missing cookie, unsupported pyinstaller version or not a pyinstaller archive') return False self.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 2.0 print('[+] Pyinstaller version: 2.0') return True def 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 False self.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 cookie tailBytes = 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 PE self.overlaySize = lengthofPackage + tailBytes self.overlayPos = self.fileSize - self.overlaySize self.tableOfContentsPos = self.overlayPos + toc self.tableOfContentsSize = tocLen print('[+] Length of package: {0} bytes'.format(lengthofPackage)) return True def parseTOC(self): # Go to the table of contents self.fPtr.seek(self.tableOfContentsPos, os.SEEK_SET) self.tocList = [] parsedLen = 0 # Parse table of contents while 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 directory if 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 += entrySize print('[+] 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 not os.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 case assert len(data) == entry.uncmprsdDataSize # Sanity Check if entry.typeCmprsData == b'd' or entry.typeCmprsData == b'o': # d -> ARCHIVE_ITEM_DEPENDENCY # o -> ARCHIVE_ITEM_RUNTIME_OPTION # These are runtime options, not files continue basePath = os.path.dirname(entry.name) if basePath != '': # Check if path exists, create if not if not os.path.exists(basePath): os.makedirs(basePath) if entry.typeCmprsData == b's': # s -> ARCHIVE_ITEM_PYSOURCE # Entry point are expected to be python scripts print('[+] 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 pass self.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/a97fdf if data[2:4] == b'\r\n': # < pyinstaller 5.3 if self.pycMagic == b'\0' * 4: self.pycMagic = data[0:4] self._writeRawData(entry.name + '.pyc', data) else: # >= pyinstaller 5.3 if self.pycMagic == b'\0' * 4: # if we don't have the pyc header yet, fix them in a later pass self.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 any self._fixBarePycs() def _fixBarePycs(self): for pycFile in self.barePycList: with open(pycFile, 'r+b') as pycFile: # Overwrite the first four bytes pycFile.write(self.pycMagic) def _writePyc(self, filename, data): with open(filename, 'wb') as pycFile: pycFile.write(self.pycMagic) # pyc magic if self.pymaj >= 3 and self.pymin >= 7: # PEP 552 -- Deterministic pycs pycFile.write(b'\0' * 4) # Bitfield pycFile.write(b'\0' * 8) # (Timestamp + size) || hash else: pycFile.write(b'\0' * 4) # Timestamp if self.pymaj >= 3 and self.pymin >= 3: pycFile.write(b'\0' * 4) # Size parameter added in Python 3.3 pycFile.write(data) def _extractPyz(self, name): dirName = name + '_extracted' # Create a directory for the contents of the pyz if not os.path.exists(dirName): os.mkdir(dirName) with open(name, 'rb') as f: pyzMagic = f.read(4) assert pyzMagic == b'PYZ\0' # Sanity Check pyzPycMagic = f.read(4) # Python magic value if self.pycMagic == b'\0' * 4: self.pycMagic = pyzPycMagic elif self.pycMagic != pyzPycMagic: self.pycMagic = pyzPycMagic print('[!] Warning: pyc magic of files inside PYZ archive are different from those in CArchive') # Skip PYZ extraction if not running under the same python version if 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)) return print('[+] Found {0} files in PYZ archive'.format(len(toc))) # From pyinstaller 3.1+ toc is a list of tuples if type(toc) == list: toc = dict(toc) for key in toc.keys(): (ispkg, pos, length) = toc[key] f.seek(pos, os.SEEK_SET) fileName = key try: # for Python > 3.3 some keys are bytes object some are str object fileName = fileName.decode('utf-8') except: pass # Prevent writing outside dirName fileName = 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') return arch.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)
