The Mafia is certainly real. The term, properly, refers only to Italian and Scicilian organized crime families, but has been extended to include other ethnic groups, as well.
The KGB (not KBG) were real. They were the Soviet Union's version of the CIA, and were replaced with a number of different agencies at the fall of the Soviet Union in 1990 and shortly thereafter. The FIS is one of those agencies, and it handles gathering intel of other countries outside Ruissia.