Russia, maybe, NK doubtful and Iran ? I do not think Iran is that stupid since in general many EU Countries are not that thrilled about Israel. But to me, it will be hard to know got 100% for sure.

>This included "the use of Farsi and IP addresses traced back to devices located in Iran"

I guess they were caught then. I heard of software that can hide or change these things called "IP addresses", but I guess using it is way too hard for organizations with plenty of resources :