1. /
  2. Security Response/
  3. W32.Kriz

W32.Kriz

Risk Level 2: Low

Discovered:
August 11, 1999
Updated:
February 13, 2007 11:34:21 AM
Type:
Virus
Systems Affected:
Windows 2000, Windows 95, Windows 98, Windows Me, Windows NT, Windows XP

W32.Kriz was first discovered in the Fall of 1999. The virus infects files on Windows 95/98 systems.

The virus has a dangerous payload that triggers on December 25 of any year. The payload is designed to overwrite files on the floppy disk, hard disk, RAM disk, and network drives. It also clears the information stored on the BIOS. This payload is similar to the W95.CIH virus.

In October 2000, Symantec Security Response received an increase in submissions of the virus. Symantec Security Response believes that the spread of W32.Kriz gained momentum when several widespread worms were infected by W32.Kriz and helped spread the virus.


Antivirus Protection Dates

  • Initial Rapid Release version August 17, 1999
  • Latest Rapid Release version September 28, 2010 revision 054
  • Initial Daily Certified version August 17, 1999
  • Latest Daily Certified version September 28, 2010 revision 036
  • Initial Weekly Certified release date August 17, 1999
Click here for a more detailed description of Rapid Release and Daily Certified virus definitions.

Threat Assessment

Wild

  • Wild Level: Medium
  • Number of Infections: More than 1000
  • Number of Sites: More than 10
  • Geographical Distribution: Medium
  • Threat Containment: Moderate
  • Removal: Easy

Damage

  • Damage Level: High

Distribution

  • Distribution Level: Low
Writeup By: Eric Chien

Search Threats

Search by name
Example: W32.Beagle.AG@mm
STAR Antimalware Protection Technologies
Internet Security Threat Report, Volume 17
Symantec DeepSight Screensaver