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 :

> I guess they were caught then.

The US and Israel have deeply penetrated Iran's network. I would not be surprised they are proxying through there to paint a picture that Iran is attacking them as well... to try to stem the tide of Israel's falling public support across the globe.