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China’s Volt Typhoon Hackers Dwelled in US Electric Grid for 300 Days


ICS/OT security firm Dragos on Wednesday published a case study describing an intrusion attributed to the notorious Chinese threat actor Volt Typhoon into the US electric grid.

The target was Littleton Electric Light and Water Departments (LELWD), a small public power utility in Massachusetts that serves Littleton and Boxborough. The utility had been in the process of implementing Dragos operational technology (OT) security solutions when the intrusion was detected, which led to an expedited deployment.

The case study published by Dragos focuses on the benefits of its solutions, including how they can be used to detect such intrusions and protect OT organizations against threats. 

However, the industrial cybersecurity firm has shared some additional details with SecurityWeek.

Dragos said the LELWD breach was discovered in November 2023, just before Thanksgiving, and an investigation showed that the hackers had been in the organization’s network since February 2023, for more than ...


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