February 15, 2018
In June 2017, the Russian military launched the most destructive and costly cyber-attack in history.
The attack, dubbed "NotPetya," quickly spread worldwide, causing billions of dollars in damage across Europe, Asia, and the Americas. It was part of the Kremlin's ongoing effort to destabilize Ukraine and demonstrates ever more clearly Russia's involvement in the ongoing conflict. This was also a reckless and indiscriminate cyber-attack that will be met with international consequences.
Donald J. Trump (1st Term), Statement by the Press Secretary on the "NotPetya" Cyber-Attack Online by Gerhard Peters and John T. Woolley, The American Presidency Project https://www.presidency.ucsb.edu/node/331956