Skip to main content

Trojan-Downloader:JS/Agent.CKL

Classification

Category:

Malware

Type:

Trojan-downloader

Aliases:

  • Trojan-Downloader:JS/Agent.CKL
  • Trojan-Downloader.JS.Agent.ckl

Summary

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

Removal

Technical Details

Upon execution, this trojan will try to take advantage of the following vulnerabilities:

  • Microsoft Office Snapshot Viewer ActiveX vulnerability
  • Sina DLoader Class ActiveX Control 'DonwloadAndInstall' Method Arbitrary File Download Vulnerability
  • Internet Explorer (MDAC) Remote Code Execution Exploit (MS06-014)
  • UUSee UUUpgrade ActiveX Control 'Update' Method Arbitrary File Download Vulnerability
  • Ourgame 'GLIEDown2.dll' ServerList Method ActiveX Control Remote Code Execution Vulnerability
  • RealPlayer IERPCtl.IERPCtl.1 (CVE-2007-5601)
  • Baidu Soba Remote Code Execute Vulnerability
  • DPClient.Vod (CVE-2007-6144)

If any of these vulnerabilities are present on the user's system, the malware will exploit it in order to download and execute files from the following sites:

  • http://down.hs7yue.cn/[...]/a2.css - Trojan.Win32.Agent.wnu
  • http://down.hs7yue.cn/[...]/sina.exe - Trojan.Win32.Agent.wnu
  • http://down.hs7yue.cn/[...]/Baidu.cab - Trojan-Downloader.Win32.Agent.wps
  • http://jzm015.cn/[...]115.swf - Exploit.SWF.Downloader.eh
  • http://jzm015.cn/[...]115.swf - Exploit.SWF.Downloader.eh
  • http://down.hs7yue.cn/[...]/UU.ini - unavailable

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.

Protect your devices from malware with F‑Secure Total

Protecting your devices from malicious software is essential for maintaining online security. F‑Secure Total makes this easy, helping you to secure your devices in a brilliantly simple way.

  • Award‑winning antivirus and malware protection

  • Online browsing, banking, and shopping protection

  • 24/7 online identity and data breach monitoring

  • Unlimited VPN service to safe­guard your privacy

  • Password manager with private data protection

Choose how many devices you want to protect to get started.

  • Free customer support

  • Cancel anytime

  • The trial does not obligate you to buy the product

After 30 days your subscription will renew automatically for one year at €69.99.

More Support

Community

Ask questions in our Community.

User guides

Check the user guide for instructions.

Contact Support

Chat with with or call an agent.

Submit a Sample

Submit a file or URL for analysis.