1. /
  2. Security Response/
  3. Trojan.Upchan


Risk Level 1: Very Low

September 23, 2004
February 13, 2007 12:27:46 PM
Trojan Horse
Systems Affected:
Windows 2000, Windows 95, Windows 98, Windows Me, Windows NT, Windows Server 2003, Windows XP

Trojan.Upchan is a Trojan horse that steals system information and posts it onto an online bulletin board.

The Trojan uses a folder icon and attempts to propagate through the Winny file-sharing network.

Antivirus Protection Dates

  • Initial Rapid Release version September 23, 2004
  • Latest Rapid Release version June 24, 2014 revision 006
  • Initial Daily Certified version September 23, 2004 revision 002
  • Latest Daily Certified version August 3, 2012 revision 004
  • Initial Weekly Certified release date September 28, 2004
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: Medium


  • 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: Kaoru Hayashi

Search Threats

Search by name
Example: W32.Beagle.AG@mm
STAR Antimalware Protection Technologies
Internet Security Threat Report