W32.Bobax.Z@mm is a mass-mailing worm that lowers security settings and allows a compromised computer to be used as a covert proxy. The worm also sends an email to addresses gathered from the compromised computer.
The worm propagates by exploiting the Microsoft Windows LSASS Buffer Overrun Vulnerability (described in Microsoft Security Bulletin MS04-011
W32.Bobax.Z@mm is a minor variant of W32.Bobax.N.
Click for a more detailed description of Rapid Release and Daily Certified virus definitions.