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Yamanner.A


Discovered:
Aliases:


June 12, 2006
Yamanner.A
JS/Yamanner@MM
Email-Worm.JS.Yamanner.a

Malware
Worm
JS

Summary

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



Disinfection & 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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