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Published Apr 13, 2009 | Updated Apr 16, 2011

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Win32/Waledac

Detected by Microsoft Defender Antivirus

Aliases: W32/Waledac.gen (McAfee) W32.Waledac (Symantec)

Summary

Win32/Waledac is a trojan that is used to send spam. It also has the ability to download and execute arbitrary files, harvest email addresses from the local machine, perform denial of service attacks, proxy network traffic and sniff passwords.

Manual removal is not recommended for this threat. To detect and remove this threat and other malicious software that may have been installed, run a full-system scan with an up-to-date antivirus product such as Microsoft Security Essentials, or the Microsoft Safety Scanner. For more information about using antivirus software, see http://www.microsoft.com/security/antivirus/av.aspx.

Win32/Waledac

Summary

What to do now

Technical information

Threat behavior

Installation

Payload

Prevention

Take the following steps to help prevent infection on your computer:

Enable a firewall on your computer

Get the latest computer updates

Use up-to-date antivirus software

Use caution when opening attachments and accepting file transfers

Use caution when clicking on links to Web pages

Avoid downloading pirated software

Protect yourself from social engineering attacks

Use strong passwords

Symptoms

System Changes