Threat Description



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


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.


Detailed instructions for F-Secure security products are available in the documentation found in the Downloads section of our Home - Global site.

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

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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