Threat Description



Category: Malware
Platform: W32
Aliases: Needy.D, Java/Needy.D


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

Once detected, the F-Secure security product will automatically disinfect the suspect file by either deleting it or renaming it.

More scanning & removal options

More information on scanning or removal options is available in the documentation for your F-Secure security product on the Downloads section of our Home - Global site.

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

Contact Support

For further assistance, 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

Description Details: Jarno Niemela, March 30th, 2004;


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