Duqu is of concern to every security professional at the moment. 99 percent of Duqu software rules are same as Stuxnet including source code and keys for encryption. The Trojan has been configured to run on the host machine for 36-days, after which the threat vector will automatically destroy itself from the system. Duqu also uses a stolen digital certificate from a Taiwanese company to prove its authenticity. The data collection may just be an initial stage of a larger setup. The Trovirus bears testimony to the beginning of an era where cyber war will grow bigger than nuclear and the likes of nuclear.
Source: https://thehackernews.com/2011/11/duqu-another-stuxnet-in-making.html