Dissecting Stuxnet 

The Stuxnet computer worm is perhaps the most complicated piece of malicious software ever built; roughly 50 times the size of the typical computer virus. It leveraged an array of new techniques to spread and conceal itself while attacking Iranian nuclear enrichment centrifuges. Symantec Chief Architect Carey Nachenberg explains how the Stuxnet worm spread, evaded detection and ultimately accomplished its mission.
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