loader.rb

require 'net/http'
require 'uri'
require 'webrick'
require 'cgi'
require 'rack'
require 'base64'
require 'zlib'

url = URI.parse('http://pwn508.ddtek.biz:52719/')
req = Net::HTTP::Get.new(url.path)
res = Net::HTTP.start(url.host, url.port) {|http|
  http.request(req)
}

value = WEBrick::Cookie.parse_set_cookie(res['Set-Cookie'])
base64_data = CGI::unescape(value.value)

data = Base64.decode64(base64_data)
obj = Marshal.load(data)

deflated = Zlib::Deflate.deflate(obj['mh7cJ%h99LPn1zSoh4,42!6e3t78Cw]i'])
puts deflated

Serializing Ruby objects and storing them in cookies?
Sounds dangerous :-P