An Iranian news agency says the country successfully fended off yet another attack by the Stuxnet worm, according to reports.
Discovered in June 2010,. It's thought to have been designed to shut down centrifuges at Iran's Natanz uranium enrichment plant, where stoppages and other problems reportedly occurred around that time. The sophisticated worm spreads via USB drives and through four previously unknown holes, known as zero-day vulnerabilities, in Windows.
Stuxnet is just one of several versions ofin the past two and a half years. Other examples include Duqu, Gauss, Mahdi, Flame, Wiper, and Shamoon.