Isolating a sensitive computer network from the Internet can be an efficient security measure, but threat actors have found ways to get around it. A group believed to be linked to the Russian government, know as “Sednit,” “APT28” and “Sofacy,” appears to have developed the tools necessary to achieve this task.
In a recent report on the attacks launched by APT28 against European governments, militaries and security organizations, FireEye revealed that one of the tools used by the group is a modular family of implants called CHOPSTICK. Researchers identified one variant of CHOPSTICK that defeats closed networks by routing messages between local directories, the registry and USB drives.
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