Stars would be the second malware infestation targeted at Iran within a years time, following the discovery of Stuxnet in July last year.(via Joseph Menn)
Outside of the published news reports, McAfee has no information on "Stars" at this time. That's different from Stuxnet, where international cybersecurity companies knew of the malware and were able to investigate it through customary sharing of malware samples.
We currently have no way of verifying the attack the Iranian government is reporting, nor do we have any way of identifying who might be behind the attack or what the target could be.