They always funded European left-wing parties at least until the fall of URSS. There were even cultural exchanges with European politicians going to Moscow. It was never a secret! The same thing is still happening today with some parties openly pro-Putin (at least until the invasion of Ukraine).
No, the ussr did not fund paramilitary nazi groups formed from the remnants of former SS troops, or anything similar.
They always funded European left-wing parties at least until the fall of URSS. There were even cultural exchanges with European politicians going to Moscow. It was never a secret! The same thing is still happening today with some parties openly pro-Putin (at least until the invasion of Ukraine).