Drovorub, a joint advisory from the NSA and the FBI reveals, is being employed by the Russian General Staff Main Intelligence Directorate (GRU) 85th Main Special Service Center (GTsSS) military unit 26165, which is better known as the cyber-espionage group APT 28 (Fancy Bear, Pawn Storm, Strontium, Sednit, Tsar Team).

APT 28 is believed to have launched attacks on NATO countries and Ukraine, and to have orchestrated the attack on DNC ahead of the 2016 elections in the United States. Earlier this year, researchers discovered that the group was hijacking high-profile email accounts to launch phishing attacks.