Britain has formally blamed Russia for the NotPetya ransomware attack in June last year, with Foreign Office Minister Lord Ahmad saying the decision "underlines the fact that the UK and its allies will not tolerate malicious cyber activity".
WannaCry was the Windows ransomware that gained the most media coverage this year but security vendor Webroot ranks NotPetya, the ransomware that hit a month later, as the nastiest in this category of Windows malware for 2016-17.
The container shipping company A.P. Moller–Maersk Group expects that a Windows ransomware attack it suffered in June will cost it between US$200 million and US$300 million.
The people behind the last malware attack, which began in Europe and then spread to other regions, appear to be trying to play down the theory that the attack was masterminded by a nation state.
The people behind the latest malware outbreak probably had access to NSA exploits — which were used to craft the malicious code — well before the Shadow Brokers dumped them on the Web in April, researchers from the Finnish security firm F-Secure claim.