A mysterious cyberattack has shuttered the Guardian's office for a monthA ransomware attack on the Guardian has hobbled the London-based news-organization’s basic operations, shutting down everything from its office wifi to the tills in the staff canteen.The Guardian described the attack that began on December 20 as a “serious incident which has affected our IT network and systems.” The paper closed its offices, telling staff to work remotely for several days around the Christmas holiday.Columnist picture bylines have disappeared in print for the moment as the result of the hack, a blow for some of the egos of the paper's opinion writers.The Guardian, which won a Pulitzer in 2014, for its reporting on Edward Snowden’s revelations about the U.S. National Security Agency, has long been considered a target for hackers, but reporting has suggested the motives for this attack may have merely been extortion via ransomware.But the Guardian’s leadership has remained silent on the attackers’ motives, and has not mentioned to staff or shared publicly whether a ransom request was actually been made."