Threat actors used a Duqu 2.0 worm in a series of attacks worldwide that also breached the systems at Kaspersky Lab. Among its targets were entities linked to the negotiations about Irans nuclear deal and IT security firms. It is most complex malware ever seen. The threat actor behind Duqu appears to have launched attacks at the venues for some of these high level talks with Iran about a nuclear deal. Symantec also detected the new strain of malware and observed infection almost in every continent.”]
Source: http://securityaffairs.co/wordpress/37714/cyber-crime/duqu-2-0-hit-kaspersky.html