There is an old saying in IT. "If it looks like Russia, it's not Russia."
I will say this however, The "Hack" itself was ingenious. They hacked a large software solution provider that hundreds of thousands of companies use. The software itself is monitoring software for computer assets in large compute environments. So there is a master server in the company and then an agent installed on every system the company wants to monitor. The hackers got in the parent company and was injecting malicious code into legitimate automatic software updates. To the customer this looked like a valid update from a trusted source. The hackers even went so far as to put it on the companies software update site. In essense they let Microsoft distribute the hack for them. After that they had free access. I will say this. The federal government may have known about this since last spring but just now made it public. When it comes to espionage if they immediately slam the door then the hacker knows everything he has is valid. But if you pretend not to notice and feed in bogus data for 6 months you can considerably muddy the water. That way when you do slam the door the hacker doesn't know whats good and whats bogus.