US, UK, Canada, Australia, and New Zealand have made formal statements accusing the Russian Federation of orchestrating the NotPetya ransomware outbreak. The White House and the UK were the first to pin the attacks on Russia, earlier this week. Russia has previously denied being behind the attack and did so again this week through its ambassadors in each of the Five Eyes countries. The Not Petya outbreak took place on June 27, 2017, and targeted mainly Ukrainian companies through a tainted update of a local accounting software. Ukraine was first to blame Russia in July 2017.
Source: https://www.bleepingcomputer.com/news/security/all-five-eyes-countries-formally-accuse-russia-of-orchestrating-notpetya-attack/