Summary
Needy.G is a Java applet based trojan that changes the Internet Explorer start page changes search settings to ones contained in the trojan and downloads a trojan downloader. Needy activates when user views a web page or HTML email that contains reference to the trojan file.
Needy.G is otherwise identical to Needy.F except it downloads the instructions from a different address.
Removal
Based on the settings of your F-Secure security product, it will either move the file to the quarantine where it cannot spread or cause harm, or remove it.
A False Positive is when a file is incorrectly detected as harmful, usually because its code or behavior resembles known harmful programs. A False Positive will usually be fixed in a subsequent database update without any action needed on your part. If you wish, you may also:
Check for the latest database updates
First, check if your F-Secure security program is using the latest updates, then try scanning the file again.
Submit a sample
After checking, if you still believe the file is incorrectly detected, you can submit a sample of it for re-analysis.
Note: If the file was moved to quarantine, you need to collect the file from quarantine before you can submit it.
Exclude a file from further scanning
If you are certain that the file is safe and want to continue using it, you can exclude it from further scanning by the F-Secure security product.
Note: You need administrative rights to change the settings.
Technical Details
The Needy.G 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 a list of instructions from a web site, by which the trojan trojan modifies the Internet Explorer start page to point to the site where the trojan is downloaded from, changes search settings and adds addresses to the visited pages history.
Like Needy.F, Needy.G is directed by instructions downloaded from a web page. The web page can specify what to which page the trojan changes the Internet start page and search settings. Also the page contains a list of web sites that are copied into the Internet Explorer page history, to make it appear that user would have been visiting certain pornographic services.
In addition to changing the Internet Explorer settings the trojan tries to download a trojan from a website and execute it. Although this page seems no longer to contain the trojan executable.
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