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  3. Trojan.Grups


Risk Level 1: Very Low

September 10, 2009
September 10, 2009 3:37:56 PM
Also Known As:
W32/GrupBot [McAfee], TROJ_AGENT.BWBF [Trend]
Infection Length:
29,184 bytes
Systems Affected:
Windows 98, Windows 95, Windows XP, Windows Me, Windows Vista, Windows NT, Windows Server 2003, Windows 2000
Trojan.Grups is a Trojan horse that opens a back door on the compromised computer and uses Google Groups to send and receive command and control messages.

Antivirus Protection Dates

  • Initial Rapid Release version September 10, 2009 revision 025
  • Latest Rapid Release version December 16, 2009 revision 007
  • Initial Daily Certified version September 10, 2009 revision 024
  • Latest Daily Certified version September 10, 2009 revision 024
  • Initial Weekly Certified release date September 16, 2009
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
  • Payload: Opens a back door on the compromised computer.


  • 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: Gavin O'Gorman

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