Yamanner.A

Threat description

Details

CATEGORYMalware
TYPEWorm
DATE DISCOVEREDJune 12, 2006

Summary

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



Removal

Automatic action

Depending on the settings of your F-Secure security product, it will either automatically delete, quarantine or rename the suspect file, or ask you for a desired action.

More scanning & removal options

More information on the scanning and removal options available in your F-Secure product can be found in the Help Center.

You may also refer to the Knowledge Base on the F-Secure Community site for more information.

Contact Support

F-Secure customers can request support online via the Request support or the Chat forms on our Home - Global site.

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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