In counter espionage everything is fair it seems. If you want to propagate a Stuxnet kind of worm, why not ride another ubiquitous worm you know about. I would not quite go so far as to say Conficker was produced for that purpose. It is involved in way too much other computer crime.
Renegade Mossad/CIA ?
http://www.freerepublic.com/focus/f-news/2815101/postsFri Dec 2, 2011 5:23am EST
(Reuters) - A cyber warfare expert claims he has linked the Stuxnet computer virus that attacked Iran’s nuclear program in 2010 to Conficker, a mysterious “worm” that surfaced in late 2008 and infected millions of PCs.