itwbennett writes: A new study of a recent cyberattack against Ukrainian power companies suggests malware didn't directly cause the outages that affected at least 80,000 customers. While malware was used to gain access to networks, the attackers then opened circuit breakers that cut power, according to information published Saturday by the SANS Industrial Control Systems (ICS) team. The attackers used direct intervention to try to mask their actions to the power systems operators and also conducted denial-of-service attacks on the utilities' phone systems to block complaints from affected customers, SANS said.
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