U.K. Officials Say Russia 'Almost Certainly Responsible' for 'Petya' Attack

British officials blamed Russia for last June’s massive “Petya” cyberattack, which crippled computer networks at multinational firms including FedEx Corp. , container-ship giant A.P. Moeller-Maersk A/S and pharmaceutical firm Merck & Co. The allegations by London represented the first time a major Western government has pinned blame on Moscow for the incident.