GRU stands for Main Intelligence Directorate, Russia’s military intelligence agency. It is responsible for gathering foreign intelligence and conducting cyber operations. The GRU is widely believed to sponsor hacking groups that target governments, organizations, and critical infrastructure worldwide. Its cyber activities often aim to advance Russian state interests, influence foreign affairs, and collect sensitive information. The agency has been linked to several high-profile cyberattacks and disinformation campaigns, making it a significant player in global cybersecurity threats.