"...at least those parts that are in their control." And there's the rub! In the article, the author notes that Ukrainian command-and-control is used in the attacks on these western services... and if they were attacking Ukrainian services, they wouldn't locate their command-and-control there.
You've identified an obvious solution and presumed that no-one is pursuing it, in dereliction of the facts.
You've identified an obvious solution and presumed that no-one is pursuing it, in dereliction of the facts.