Botnets are networks of compromised computers controlled by cybercriminals. Botnets can send out spam, spread malicious software, steal passwords, and more.

Zbot (also known as the "Zeus Botnet") has been responsible for stealing passwords and other financial information from infected computers worldwide.

Today, Microsoft published a special edition of the Security Intelligence Report that details ongoing success in the battle against Zbot.

Download the Zbot Analysis paper.

For more detailed information on battling botnets, see the Featured Intelligence section of the Security Intelligence Report website.

Protect yourself against botnets

Protect your computer with Microsoft Security Essentials Software

Microsoft Security Essentials is the no-cost, high-quality service that helps protect against botnets and other malicious software.

If you think your computer is already infected by a botnet, try the following: