It’s possible the CIA was responsible but it’s highly unlikely in my opinion, despite the criticism the US has some of the best cyber warriors in the world on par with any country in the world.
The Nord Stream issue is a totally different topic, I’m speaking specifically about a cyber information war being carried out thru hackers, etc.
Check that, would you believe “a pro Ukrainian group”? Like I say, amateurish from US to proxy to propaganda organ. Nothing DC does or is involved in surprises me anymore.