Trojan-Downloader:JS/Agent.CKK

Classification

Category :

Malware

Type :

Trojan-Downloader

Aliases :

Trojan-Downloader.JS.Agent.ckk

Summary

This type of trojan secretly downloads malicious files from a remote server, then installs and executes the files.

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

Upon execution, this trojan tries to take advantage of the following vulnerability:

  • Microsoft Office Snapshot Viewer ActiveX vulnerability

If this vulnerability is present on the user's system, the malware exploits it in order to download and execute a file from the URL http://down.hs7yue.cn/[...]/ac.css. The downloaded file is detected as the malware Trojan.Win32.Agent.wnu.