Possibly ... Iran does have a strategic attractiveness for Russia, in that an alliance would give them access to Persian Gulf ports. Deals like this would go a long way toward giving Russia an increased influence in the region.
Way back in the Iran/Contra timeframe, National Review printed something from Oliver North, saying that the Iran part of the deal was meant to head off a Russian-instigated revolution that would have given them Persian Gulf access...
Even russia knows better than to get too coze to Iran. They have enough problems in Chechnya
this could also be a tool used by Putin to evidence Russia’s displeasure with the U.S. missile shield going up in Eastern Europe