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ctnguyenvn/blog-FindKeyXorFile.py

Created September 30, 2018 18:14
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challenge ransomware file decode D-CTF
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blog-FindKeyXorFile.py
#!/usr/bin/python3
import string
import sys
index = int(sys.argv[1])
char = str(sys.argv[2])
allp = string.ascii_letters + string.punctuation + string.digits
file = open('youfool.exe', 'rb').read()
key = ''
for i in allp:
key = chr(ord(i) ^ file[index])
if key == char:
print(i)
break
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