I think it's 50/50 some real gang vs a branch of the NSA who sees how pwned the US infrastructure is and wants to make a (fairly harmless) splash so we take it more seriously and patch our shit.
If I were running the Russian hacking center in charge of pwning US infrastructure, I'd be pissed as hell. This is like getting vaccinated -- all of a sudden we're going to take this seriously and patch a bunch of exploits that they've had ready to go.