Cyber criminals have exploited the power of Google’s DoubleClick and popular Zedo advertising agency to deliver malicious advertisements that could install malware on a user’s computer. Malvertising is not any new tactic used by cybercriminals, but Malwarebytes researcher says it is not a new tactic. Zemot malware was identified by Microsoft earlier this month and by now millions of computers have likely been exposed to the malware. The malware focuses on computers running Windows XP, although it can also infect modern operating systems running on x86 and 64 bit machines.
Source: https://thehackernews.com/2014/09/malicious-google-doubleclick.html