Summary

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.

Disinfection

Removal Instructions

http://support.f-secure.com/enu/home/virusproblem/howtoclean/removetrojan.shtml

Additional 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

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

[FSAV_Database_Version]
Version=2004-03-30_02

Write-up: Jarno Niemela, March 30th, 2004;