XorBruteforce.py

import sys
from loguru import logger


def Decrypt(key,data):
    dataList = []
    for x in data:
        #
        dataList.append((x) ^ int(key,0))
    dataL = (''.join('{:02x}'.format(x) for x in dataList))
    #print(dataL[521849])
    return bytearray.fromhex(dataL)


listOfVals = {}


with open(sys.argv[1],"rb") as f:
    counter = 0
    file1 = f.read()
    while counter < 0x100:
        count = file1.count(counter)
        try:
            if sys.argv[2] == "logging":
                print(f"{count} occurrences found of {hex(counter)}")
        except:
            a = 0
        listOfVals[hex(counter)] = count
        counter += 1
output = max(listOfVals,key=listOfVals.get)
print(output)



logger.info(f"Possible Hex Key: {output}")

inp = input("Decrypt with hex key? (Y/N) ")
if inp == "Y":
    outData = Decrypt(output,file1)
    file2 = open("{0}_decrypted".format(sys.argv[1]),"w+b")
    file2.write(outData)
    file2.close()
elif inp == "N":
    logger.error("Ok. Exiting.")
    sys.exit()
else:
    logger.error("Incorrect arg supplied.")