A new study of a cyberattack last month against Ukrainian power companies suggests malware didn’t directly cause the outages. Instead, the malware provided a foothold for key access to networks that allowed hackers to open circuit breakers that cut power. The Dec. 23 attacks in Ukraine are the most prominent example yet of those fears coming to fruition. The attacks reportedly affected two service providers — Prykarpattyaoblenergo and Kyivobenergo — the latter said in a service update that 80,000 customers after 30 substations went offline.”]