Berserk Bear
Berserk Bear (also known as BROMINE, Crouching Yeti, Dragonfly, Dragonfly 2.0, DYMALLOY, Energetic Bear, Ghost Blizzard, Havex, IRON LIBERTY, Koala, or TeamSpy) is a Russian cyber espionage group, sometimes known as an advanced persistent threat. According to the United States, the group is composed of "FSB hackers," either those directly employed by the FSB or Russian civilian, criminal hackers coerced into contracting as FSB hackers while still freelancing or moonlighting as criminal hackers.