Whitepaper entitled HackBack – A DIY Guide for those without the patience to wait for whistleblowers.
You can download it from the following link: https://packetstormsecurity.com/files/download/142322/hackback-nopatience.txt
Source: https://packetstormsecurity.com/files/142322/HackBack-A-DIY-Guide-For-Those-Without-The-Patience-To-Wait-For-Whistleblowers.html