W32.Duqu - The precursor to the next Stuxnet
On October 14, 2011, Symantec was alerted to a sample by a research lab with strong international connections that appeared very similar to the Stuxnet worm from June of 2010. This threat has been named W32.Duqu [dyü-kyü] because it creates files with the file name prefix “~DQ”. The threat was recovered from an organization based in Europe. Symantec has confirmed Duqu is a threat nearly identical to Stuxnet, but with a completely different purpose.