Threat Description

Yamanner.A

Details

Aliases: Yamanner.A, JS/Yamanner@MM, Email-Worm.JS.Yamanner.a
Category: Malware
Type: Worm
Platform: JS

Summary



Yamanner is a JavaScript worm that targets Yahoo! web-based e-mail and groups.



Removal



Automatic Disinfection

Allow F-Secure Anti-Virus to disinfect the relevant files.

For more general information on disinfection, please see Removal Instructions.



Technical Details



The Yamanner worm activates by just opening an infected e-mail message with Internet Explorer. To do this it uses a 0-day vulnerability in the Yahoo! Mail system.

Yamanner builds its e-mail messages and sends them to the infected user's contacts. The sent e-mails look as follows:

  • Subject: New Graphic Site Body: Note: forwarded message attached.

The worm resides inside the e-mail body. It also tries to open a web page in another browser window.



Detection


F-Secure Anti-Virus detects this malware with the following updates:
Detection Type: PC
Database: 2006-06-13_02




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