http://www.idigitaltimes.com/articles/10390/20120724/ac-dc-virus-rocks-iranian-nuclear-program.htm
Dirty deeds, indeed. In a letter released by Mikko Hypponen of Finnish digital security firm F-secure, an Iranian scientist contacted the firm for help with a "music" virus. The virus shut down equipment at the Natanz uranium enrichment facility and at an underground research facility in Fordo.