There is news that the Stuxnet malware may have been aimed specifically at control systems in Iran’s nuclear programme. If so, it was an act of war. If the perpetrators are discovered this could get ugly. If the prerpetrators are not found, expect the attitude of Iran’s government to stiffen, if that is possible.
If I were in charge in Iran, I would rip out that other OS and beef up security. Control systems should not even be connected to the web when they are on-line. That is insane, like leaving the front doors of the building unlocked. I would bet the Iranians are making all kinds of plans to tighten things up. It’s not their fault. Everyone who has been working alone re-invents the wheel. The isolation with “the west” forced them to do many things on their own which may not have benefited from the mistakes everyone else has made in the nuclear age. They may have simply copied techniques they used for oil production which is not as a volatile/critical as a nuclear programme.
The twits who did this should be punished whoever they are. They are playing with fire. Dealing with an aggressive party with aggression is a sure way to escalate to all-out war. We don’t need that.