North Korean hackers have targeted critical energy infrastructure and finance sectors as part of a complex series of supply chain attacks, a U.S. cybersecurity firm reported Friday, in a sign that the cascading intrusions could spread far and wide. 

Symantec warns in a new report that hackers targeted “strategically important organizations” by piggybacking off of the same compromised digital trading software that gave them access to the videoconferencing software 3CX.

Two critical infrastructure organizations in the energy sector, one in the U.S. and one in Europe, and two financial trading companies were targeted