Status : moderate risk
04.19.07 16:13 "severe risk" to "moderate risk"

Kaspersky Lab has detected mass mailings of a new variant of Warezov, Email-Worm.Win32.Warezov.nf. At 8.00 Moscow Standard Time, 19 April 2007, 70-85% of the malicious content in mail traffic consisted of various forms of a new modification of Warezov - the Warezov.nf worm.

A few hours before this point, there was a noticeable increase in mail traffic of an earlier modification of Warezov - Warezov.do which featured in the October 2006 Top 20.

If you are using Kaspersky Anti-Virus 6.0 or Kaspersky Internet Security 6.0 with Proactive Protection turned on, new variants will be detected without the need to update your antivirus databases.

A full description of Email-Worm.Win32.Warezov.nf is now available in the Virus Encyclopaedia.

• Kaspersky Anti-Virus database updates
• Description of Email-Worm.Win32.Warezov.nf