"Hot on the heels of a recent hack in which 10,000 sites were compromised, researchers have disclosed a new large-scale attack..
Researchers at McAfee estimated that the attack has been active for roughly one week, and in that time frame has managed to place itself on roughly 200,000 web pages.
"The infected pages bring up what appears to be a pornographic web site. Upon loading the page, a 'fake codec' social engineering attack is attempted. The user is told that in order to view the movie on the page, a special video codec must be installed."