Threat description


Platform: W32
Aliases: Needy.H, Java/Needy.H


Needy.H is a Java applet based trojan that downloads and executes a trojan downloader. Needy activates when user views a web page or HTML E-mail that contains a reference to the trojan file.


Automatic action

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


More information on 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

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.H 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 the trojan downloads an executable from web server saves it to users home directory and executes it.


Detection in F-Secure Anti-Virus was published on April 2nd, 2004 in update:

Detection Type: PC
Database: 2004-04-02_02

Description Details: Jarno Niemela, April 2nd, 2004;


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