Hussain was known as TriCk from the disbanded hacking group TeaMp0isoN. He was a key figure in a group of Islamist computer hackers who call themselves the Cyber Caliphate. The Islamist hackers have been involved in defacing French websites during the 2015 Île-de-France attacks and the Twitter feeds of the U.S. Central Command, "Newsweek" and the "International Business Times". The group is believed to be behind the use of a spearphishing attack that exposed identities of rebel media groups.