When more than 100,000 people in and around the Ukrainian city of Ivano-Frankivsk were left without power for six hours, the Ukrainian energy ministry accused Russia of launching a cyberattack on the country’s national energy grid.
As many as 80,000 residents in western Ukraine lost power for six hours on Dec. 23. Cybersecurity firms SANS ICS and iSight Partners have attributed the blackout to Russian hacking group Sandworm and its malicious software,BlackEnergy 3.