ISS Source claims Iranian agent infected Iranian systems at Natanz nuclear facility with Stuxnet malware. The individual carrying out the attack could have been part of the Mujahedeen-e-Khalq (MEK) group, which was connected to the assassination of several Iranian nuclear scientists in the last three years. The malware exploited a raft of zero-day vulnerabilities to attack SCADA software. It has since been connected to a second piece of malware, Duqu, which is also known to have had success infecting computers in Iran.”]