gistfile1.txt

#!/usr/bin/env python
#
# Change byte order of 4-byte words
# Usage: ./revert.py "\x00\x01\x02\x03"
#
# output    \x03\x02\x01\x00

import sys

if len(sys.argv) != 2:
    print("Usage: revert.py [SHELLCODE]")
    exit()

shellcode = sys.argv[1]

#hex = "".join(["\\x%02x" % ord(c) for c in shellcode])
hex = shellcode
print("Input: %s" % hex)
list = hex.split("\\x")[1:]
listnew = []
i = 0
while i < len(list):
    word = [ list[3+i], list[2+i], list[1+i], list[0+i] ]
    for c in word:
        listnew.append('\\x%s' % c)
    i+=4
print("Output: %s" % ''.join(listnew))