Created
June 11, 2023 02:51
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CipherIT Extractor
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| #!/usr/bin/env python | |
| # pip install malduck | |
| import re | |
| import argparse | |
| from malduck import lznt1, rc4 | |
| __version__ = '1.0.0' | |
| __author__ = '@c3rb3ru5d3d53c' | |
| r_key = re.compile(r'Binary\(\w+\(\"([^\"]+)\", ?(\d+)\)') | |
| r_ct = re.compile(r'(= \x270x|&= \x27)([A-F0-9]+)', re.MULTILINE) | |
| def decode_string(string: str, key: int) -> str: | |
| return ''.join([chr(int(c) - int(key)) for c in string.split('U')]) | |
| def decode_key(data): | |
| match = r_key.search(data) | |
| if not match: return None | |
| return decode_string(match.group(1), int(match.group(2))) | |
| def get_ciphertext(data): | |
| matches = r_ct.finditer(data) | |
| if matches is None: return None | |
| return bytes.fromhex(''.join([x.group(2) for x in matches])) | |
| parser = argparse.ArgumentParser( | |
| prog=f'extractor v{__version__}', | |
| description='Extract AutoIt Payload', | |
| epilog=f'Author: {__author__}' | |
| ) | |
| parser.add_argument( | |
| '-i', | |
| '--input', | |
| type=str, | |
| default=None, | |
| help='Input File', | |
| required=True | |
| ) | |
| parser.add_argument( | |
| '-o', | |
| '--output', | |
| type=str, | |
| default=None, | |
| help='Output File', | |
| required=True | |
| ) | |
| parser.add_argument( | |
| '-k', | |
| '--key', | |
| type=str, | |
| default=None, | |
| help='Key', | |
| required=False | |
| ) | |
| args = parser.parse_args() | |
| data = open(args.input, 'r').read() | |
| key = args.key | |
| if key is None: key = decode_key(data) | |
| ct = get_ciphertext(data) | |
| pt = lznt1(rc4(key.encode(), ct)) | |
| open(args.output, 'wb').write(pt) |
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