Created
July 3, 2023 14:01
-
-
Save h4sh5/eb81ef8bb0aacf4d5e144f2a1eb88f08 to your computer and use it in GitHub Desktop.
patch hex patterns in file
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| #!/usr/bin/env python3 | |
| import re | |
| import binascii | |
| import sys | |
| import time | |
| if len(sys.argv) < 3: | |
| print("usage: %s <file> <hex pattern> [replace pattern (default all NOPs)]" %sys.argv[0]) | |
| exit(1) | |
| file = sys.argv[1] | |
| data = open(file,'rb').read() | |
| pattern = binascii.unhexlify(sys.argv[2].replace(' ','')) # get rid of spaces | |
| # default replacement, all NOPs | |
| replacement = b"\x90" * len(pattern) | |
| if len(sys.argv) > 3: | |
| replacement = binascii.unhexlify(sys.argv[3]) | |
| print('pattern:',pattern) | |
| print('replacement:', replacement) | |
| found_index = data.find(pattern) | |
| occurrences = 0 | |
| while found_index != -1: | |
| if found_index != -1: | |
| occurrences += 1 | |
| print('found at', hex(found_index)) | |
| found_index = data.find(pattern, found_index+1) | |
| print("found",occurrences,"occurrences") | |
| outfilename = file + "." + str(int(time.time())) + ".patched" | |
| with open(outfilename, 'wb+') as f: | |
| f.write(data.replace(pattern, replacement)) | |
| print("done, written to", outfilename) |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment