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Yamanner.A

Classification

Category: Malware

Type: Worm

Aliases: Yamanner.A, JS/Yamanner@MM, Email-Worm.JS.Yamanner.a

Summary


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

Removal


Automatic action

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

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About the product

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Submit a sample

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Technical Details


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

Yamanner builds its email messages and sends them to the infected user's contacts. The sent emails look as follows:

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

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