Up to now I have not seem a single report from really trusted sources in Iran. All media stories are western-based stories about iran. It's just me or this equals to propaganda. I don't trust the anti-virus companies reports (I don't use Windows either). This story smells funny too because of all the media hype anti-iran about it's nuclear energy production by the neocons (still alive). It seems more of the same. Bash Iran, create false news, whatever.
I have worked in Software/Systems for Advanced and normal industrial automation and it's standard procedure this networks are disconnected from the Internet.