Spitfire Hacker wrote "Hacking SAM - A Description Of The Dial-Up Security System" which is a phile of Phrack Volume One.
Probably the first guy who hacked SAM because of his phile.
http://phrack.org/issues/1/2.html#article
https://sinister.ly/Thread-SAM-Security-Article-by-Spitfire-Hacker