Another case of "Malvertisement"

The drive-by-download attack was distributed via adverts shown on the YouTube website, and used an exploit kit to infect Windows PCs with a version of the Caphaw banking Trojan.

Bromium worked with the Google security team over the weekend to resolve the issue on YouTube.

However, it’s quite possible that some users have still had their computers infected by the malware attack, and could be having their banking credentials stolen as a result.

More details are in the link below:
http://labs.bromium.com/2014/02/21/the-wild-wild-web-youtube-ads-serving-malware/