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'''DuQu''' is [[computer]] [[malware]] classified as a Trojan Horse. It is built with the same basic source code of [[Stuxnet]], so it has been concluded that this malware was designed and released by the same party responsible for Stuxnet. Some are even referring to DuQu as Stuxnet 2.0.<ref>http://www.pcworld.com/article/242114/duqu_new_malware_is_stuxnet_2.html</ref> In general, this Trojan Horse was designed for intelligence gathering and espionage.<ref>http://www.kaspersky.com/about/press/major_malware_outbreaks/duqu</ref> There have been two versions of this malware released so far--the latter was detected in June of 2015.<ref>http://www.kaspersky.com/about/news/virus/2015/Duqu-is-back</ref>