One of the largest ransomware attacks in history has spread worldwide, affecting thousands of businesses and forcing Swedish grocery store chain Coop to close all 800 of its stores because it could not operate its cash registers. It follows a scourge of headline-grabbing attacks over recent months that have been a source of diplomatic tension between US President Joe Biden and Russian President Vladimir Putin over whether Russia has become a safe haven for cybercriminal gangs.

Source: Swedish supermarket chain shut as massive cyber attack spreads