The Internet threat alert status is currently normal. At present, no major epidemics or other serious incidents have been recorded by Kaspersky Lab’s monitoring service. Internet threat level: 1


Detected Feb 20 2011 03:35 GMT
Released Feb 22 2011 08:34 GMT
Published Mar 25 2011 11:33 GMT

Technical Details
Removal instructions

Technical Details

This program has a malicious payload. It is an HTML document containing Java Script. It is 43 256 bytes in size.


Once launched, the Trojan uses additional JS scripts to strip obfuscations from its main malicious code. The Trojan then determines the operating system version, the current browser and the plugins installed in browser. It exploits a vulnerability in Java Deployment Toolkit (JDT) that arises due to incorrect processing of URL. This allows the malicious user to send random parameters to Java Web Start (JWS) (CVE-2010-0886). The malicious user generates a specially crafted link and sends it as the parameter of vulnerable "launch()" function. This way the Trojan downloads and launches the malicious file for execution from the following link:

It also sends a link for downloading:
The Trojan uses ActiveX objects with unique identifiers to run its malicious script in MS Internet Explorer:
To execute its script in Mozilla Firefox and other NPAPI browsers, the Trojan determines the following MIME types:
The malware then determines the plugins installed in the browser and Adobe Reader and Adobe Acrobat ActiveX objects. Then, depending on the PDF Reader version, in a hidden frame it downloads a PDF exploit from one of the following links:
At the time of writing, these links were inactive.

Removal instructions

If your computer does not have antivirus protection and has been infected by this malicious program, follow the instructions below to delete it:

  1. Delete the original Trojan file (its location will depend on how the program originally penetrated the infected computer).
  2. Empty the Temporary Internet Files directory, which contains infected files (see How to delete infected files from Temporary Internet Files folder?):
    %Temporary Internet Files%
  3. Update Sun Java JRE and JDK to the latest versions.
  4. Empty the current user's temporary files directory:
    %Temp %\
  5. Perform a full scan of the computer using Kaspersky Anti-Virus with up-to-date antivirus databases (download a trial version).

[MD5: 0c3508d4b8841c9c057f74c9af64bb53] [SHA1: 477ea4eb919593e8c0e0587e1dc8db7470e4e70b]

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Programs classified as Trojan-Downloader download and install new versions of malicious programs, including Trojans and AdWare, on victim computers. Once downloaded from the Internet, the programs are launched or included on a list of programs which will run automatically when the operating system boots up.

Information about the names and locations of the programs which are downloaded are in the Trojan code, or are downloaded by the Trojan from an Internet resource (usually a web page).

This type of malicious program is frequently used in the initial infection of visitors to websites which contain exploits.

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