Trojan-Downloader.JS.Agent.crh

Technical Details

This Trojan downloads other files via the Internet and launches them for execution on the victim machine. The program is an HTML page which contains Java Script scenarios. It is 1070 bytes in size.

Payload

If during launch, there is no “some=” cookie on the victim machine, the Trojan will create this cookie for 24 hours by using a vulnerability in Adobe Flash Player to connect to the following addresses:

http://www.1ive.net/***/swf.php
http://www.1ive.net/***/ver.swf

At the time of writing, these links were not working.

The vulnerable ActiveX element has the following unique identifier in the system registry:

{d27cdb6e-ae6d-11cf-96b8-444553540000}

Removal instructions

If your computer does not have an up-to-date antivirus, or does not have an antivirus solution at all, follow the instructions below to delete the malicious program:

1. Delete the original Trojan file (the location will depend on how the program originally penetrated the victim machine).
2. Delete all files from %Temporary Internet Files%.
3. Disable the vulnerable ActiveX object (see How to stop an ActiveX control from running in Internet Explorer)
4. Update your antivirus databases and perform a full scan of the computer (download a trial version of Kaspersky Anti-Virus).