1. Cyberwar is asymmetric.
2. Cyberwar is non-kinetic.
3. Cyberwar is not attributable.
All "asymmetry" means is not taking on an adversary they way that adversary battles you. If you saw the movie "Tin Cup", the protagonist challenges an opponent to a golf round using only garden tools. Was it a "war"? Yes. Was asymmetry applied? Yes. The effects desired were achieved. It could easily be argued that the protagonist entered the contest at equal or greater skill. But rather than contest the ground (so to speak) with traditional "weapons" he used irregular ones.

Kinetic/non-kinetic; Lethal/Non-lethal are all going to blur as more things from which kinetics and lethality derive are computerized, have an IP address, or are controlled remotely using portions of the electromagnetic spectrum.

Attribution will come more from the will to say who than the ability to discover who. If a bunch of "religious extremists" plan, resource, and conduct their ops from a country (say, Outer Slabovia), there is usually no difficulty declaring that country a "state sponsor of terrorism". Yet if that same bunch were to conduct hacking and what not from IP addresses emanating from that same country, all manner of contortions are done to say it is "unattributed".