A cyber attack against the Government Ukraine energy company Ukrenergo may be the root cause of power outage that occurred in Ukraine late on Saturday. The power outage occurred at the midnight between Saturday and Sunday, the problems affected theNorth substation at Petrivtsi. The incident caused blackouts in the city of Kiev and neighboring regions. Experts at the company were able to restore power in 30 minutes with a manual procedure. In December 2015 power outage in Ukraine, experts at eiSight Partners speculated that the Russian Sandworm APT group was responsible for the outage.”]
Source: https://securityaffairs.co/wordpress/54572/cyber-warfare-2/ukraine-power-outage.html