Hackers probed weaknesses in network firewalls of a U.S. power utility to attempt a distributed denial-of-service attack. The incident, which took place in March, caused a brief communication disruption between remote sites and the main control center. There was no disruption in electricity service as a result of the incident. The North American Electric Reliability Corp. report recommends the utility make several improvements, including better software patch management and creating a layered defense to help build in redundancies.”]
Source: https://www.databreachtoday.com/hackers-attempted-ddos-attack-against-utility-report-a-13057