This attack could pose a serious security threat. You should take immediate action to stop any damage or prevent further damage from happening.
A Web based attack relating to W32.Ramnit has been blocked. Opening infected page may result in compromise of the host machine. No further action is required, but you may wish to update your virus definitions and run a full system scan as a precautionary measure.
W32.Ramnit is a worm that spreads through removable drives and by infecting executable files. W32.Ramnit!html is a generic detection for .html files infected by W32.Ramnit.