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  3. MSH.Cibyz!int


Risk Level 1: Very Low

July 21, 2006
February 13, 2007 12:58:05 PM
Worm, Virus
Systems Affected:
Windows 2000, Windows 95, Windows 98, Windows Me, Windows NT, Windows Server 2003, Windows XP

MSH.Cibyz!int is a proof of concept worm written in the Windows PowerShell scripting language. The worm deletes files and attempts to spread through the Kazaa file sharing network.

Detections prior to August 3rd, 2006 may detect this threat as MSH.Czybroks!int

Antivirus Protection Dates

  • Initial Rapid Release version July 22, 2006
  • Latest Rapid Release version September 28, 2010 revision 054
  • Initial Daily Certified version July 22, 2006
  • Latest Daily Certified version September 28, 2010 revision 036
  • Initial Weekly Certified release date July 26, 2006
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: Mircea Ciubotariu

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