Israel tested Stuxnet worm

Stuxnet, which first came to light in June 2010 now may have been aimed at Iran as early as mid-2009, has been extensively analyzed by security researchers, most notably a three-man team at Symantec, and by Ralph Langner of the German firm Langner Communications GmbH.

The moment when they will have cleaned up all systems

"In the moment when they will have cleaned up all systems, a new dropper exploiting new Windows zero-day vulnerabilities will likely be underway already," Langner asserted last week, echoing innovation last September that said systems scrubbed of Stuxnet could be easily re-infected.