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F-Secure Malware Information Pages: Trojan-Downloader:JS/Agent.CKK
[Summary] | [Additional Details]

Name : Trojan-Downloader:JS/Agent.CKK
Detection Names : Trojan-Downloader.JS.Agent.ckk
Type:Trojan-Downloader
Category:Malware
Platform:JS
Radar

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

The online F-Secure Health Check can help determine whether a user's system has vulnerabilities which can be exploited, and assist in finding fixes for any vulnerabilities discovered.
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F-Secure Corporation

Last Modified: September 05, 2008