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Risk Level 1: Very Low

October 27, 2003
December 18, 2008 4:28:42 PM
Also Known As:
JS.Downloader.Trojan [Symantec]
Systems Affected:
Windows 2000, Windows 95, Windows 98, Windows Me, Windows NT, Windows Server 2003, Windows Vista, Windows XP
JS.Downloader is a Trojan Horse that downloads malicious files from Web sites and executes them.

Note: Virus definitions dated December 18, 2008 or earlier detect this threat as JS.Downloader.Trojan.

Antivirus Protection Dates

  • Initial Rapid Release version October 28, 2003
  • Latest Rapid Release version April 30, 2015 revision 007
  • Initial Daily Certified version October 28, 2003
  • Latest Daily Certified version April 30, 2015 revision 017
  • Initial Weekly Certified release date October 29, 2003
Click here for a more detailed description of Rapid Release and Daily Certified virus definitions.

Threat Assessment


  • Wild Level: Low
  • Number of Infections: 0 - 49
  • Number of Sites: 0 - 2
  • Geographical Distribution: Low
  • Threat Containment: Easy
  • Removal: Easy


  • Damage Level: Low


  • Distribution Level: Low
Note: On May 14, 2015, modifications will be made to the threat write-ups to streamline the content. The Threat Assessment section will no longer be published as this section is no longer relevant to today's threat landscape. The Risk Level will continue to be the main threat risk assessment indicator.
Writeup By: Kevin Ha

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