Threat description



Needy trojan family consists of trojans thatare written in Java and use vulnerability in Microsoft Internet Explorer Java Runtime. Usually these trojans change Internet Explorer homepage and search settings and some variants also download executable trojans.

This variant Needy.L changes Internet Explorer start page and search settings to adult sites and downloads trojan executable.


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.L 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.


Detection in F-Secure Anti-Virus was published on June 29th, 2004 in update:

Detection Type: PC

Database: 2004-06-29_02

Submit a Sample

Suspect a file or URL was wrongly detected? Send it to our Labs for further analysis

Submit a Sample

Give And Get Advice

Give advice. Get advice. Share the knowledge on our free discussion forum.

More Info