What You Should Know About the Sasser Worm and Its Variants

Microsoft teams have confirmed that the Sasser worm (W32.Sasser.A and its variants) is currently circulating on the Internet. Microsoft has verified that the worm exploits the Local Security Authority Subsystem Service (LSASS) issue that was addressed by the security update released on April 13 in conjunction with Microsoft Security Bulletin MS04-011.

To protect your computer against Sasser and its variants, visit the Microsoft Security website at:

• http://www.microsoft.com/security/incident/sasser.asp

This page includes instructions on protecting your computer from the Sasser Worm and it's variants, as well a detection utility and removal tool if the worm is found on your computer.

To help protect your computer against a wide variety of security threats, see Protect Your PC also at the Microsoft website.