Threat description



Needy.D is a family of Java applet based trojans that are downloaded into user computer and download further trojans and modify explorer settings. Needy activates when user views a web page or HTML E-mail that contains reference to the trojan.

This variant of Needy, Needy.D is a simple trojan downloader that downloads Trojan dropper win32.mute and executes it. It does not modify any settings by itself.


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 Needy.D is activated when a web site containing the trojan is loaded with unpacthed Microsoft Internet Explorer browser. When the JAR file containing the trojan is executed it uses Microsoft Internet Explorer VerifierBug vulnerability to get full privileges by escaping the Java security, and execute its code.

When executed trojan downloads trojan downloader win32.mute and executes it.


Detection in F-Secure Anti-Virus was published on March 30th, 2004 in update:

Detection Type: PC

Database: 2004-03-30_02

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