register_options(
      [
        OptString.new('WRITABLEDIR', [ true, 'A directory where we can write files', '/tmp' ]),
        OptString.new('EXTURL', [ false, 'An alternative host to request the EXE payload from' ]),
        OptString.new('TARGETURI', [true, 'The base path to the vulnerable application area', '/ping.ccp']),