Cyber-espionage operations from Cozy Bear, a threat actor believed to work for the Russian government, continued undetected for the past years by using malware families previously unknown to security researchers. ESET tracking this threat actor found at least three victims of Operation Ghost, all being European Ministries of Foreign Affairs including the Washington DC embassy of a European Union country. The primary purpose of the group is cyber espionage and the targets are typically governments in the West and former USSR countries as well as organizations connected to NATO, think tanks, and political parties.
Source: https://www.bleepingcomputer.com/news/security/cozy-bear-russian-hackers-spotted-after-staying-undetected-for-years/