This goes to the point I was making the other day about the risk of hackback when your attribution can be all wrong: an editorial by Financial Times begins:
In the sordid world of cyber war, there is no such thing as professional courtesy. That was the finding of a report this week, which said a Russian cyber espionage unit carried out attacks under the guise of being Iranian. The growing difficulty of finding the provenance of hacks is only matched by the rising damage which cyber attacks can achieve. The risks from misguided retaliation demand continued efforts to identify the origins of attacks.
Read more on FT.