Soviet Union does not exist and SU domain is not retired.
That's what KGB wants you to think
These days however, the Russian intelligence landscape is more complicated, with multiple semi-private organizations, informal groups, and other stakeholders.
https://en.wikipedia.org/wiki/Simpson_Tide
Ironically, there's some unintended truth in their reference (i.e. to all intents and purposes the KGB hasn't gone anywhere and basically is still around, just renamed/reorged) but that's an entirely different thread.