This attack could pose a serious security threat. You should take immediate action to stop any damage or prevent further damage from happening.
This signature detects an infected webpage that has been modified by W32.Virut family of viruses. This webpage may redirect the users to a malicious web site which may compromise the target machine.
W32.Virut!html is a generic detection for HTML files infected by variants of the W32.Virut family of viruses. It may contain the functionality to redirect users to a malicious Web site that may exploit the browser.
For more information, please see the following resources:W32.Virut