Why would that be the case? Ukraine has a very large IT sector and they have a lot of good IT security specialists. To be honest, a lot of cybercriminals have been from Ukraine.

So I don't see why it would be the case that Ukraine could not have done this by themselves. They have done previous attacks by themselves. I don't see why that would be the case.

It would kind of be like saying, "Oh, if Russia does a cyberattack, it can't have been them acting alone. It must have been China that gave them the stuff to just press a button."