The 21-year-old British hacker found guilty of a long string online crimes including distributing a keylogger Trojan disguised as a Call of Duty software patch, has pleaded guilty to launching DDoS attacks on the websites of Oxford and Cambridge Universities.

According to police, Lewys Martin (or ‘Sl1nk’ as he was known) launched the ‘hacktivist’ attacks between 29 January and 1 February 2012, following this up the next day with a similar attempted DDoS on the website of Kent Police.

In all three cases the disruption was temporary although Martin’s alleged intent had been to compromise the websites as part  of a politically-motivated campaign, which led to his arrest on 3 February, police said.

The attacks would have been a relatively naïve crime it is wasn’t for previous attacks for which he has already been found guilty, including the Call of Duty keylogger attack and physical burglaries of computer equipment from two colleges in Kent while on bail.

Martin was also accused by police of harvesting 300 credit cards during his keylogging campaign, which he sold to foreign criminals it was alleged.

Martin was given an 18-month jail term last May, and could be facing a second stretch in jail when he is sentenced for the latest DDoS attacks on 13 May.

'In this case, Martin was attacking not only large organisations, but individuals,” said prosecutor Ken Goss from CPS South East Complex Casework Unit.

'Both Oxford and Cambridge Universities estimate that around two weeks’ worth of man hours were spent, dealing with the cyber-attacks. We would like to thank Cambridge and Oxford universities, who together with Kent Police and the victims, have supported this case to a successful conclusion.'