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Panda Protection

Virus Encyclopedia

Welcome to the Virus Encyclopedia of Panda Security.

Encyclopedia GetVirusCard True 0

CIH.1106

 
Threat LevelModerate threatDamageHighDistributionNot widespread
Common name:CIH.1106
Technical name:W32/CIH.1106.A
Threat level:Low
Type:Virus
Effects:  It formats the C: drive and prevents users from starting the computer.

Affected platforms:

Windows 2003/XP/2000/NT/ME/98/95

First detected on:Nov. 28, 2002
Detection updated on:March 17, 2006
StatisticsNo
Proactive protection:
Yes, using TruPrevent Technologies
Family:Chernobyl

Brief Description 

    

CIH.1106 is a resident virus that activates when the day value in the system date stamp matches 2.

Bearing in mind the actions it carries out, CIH.1106 is considered dangerous, as it deletes the content of the hard disk, preventing Windows Me/98/95 computers from starting up. It also infects files with an EXE  extension, but only in Windows Me/98/95 computers.

In addition, CIH.1106 deletes the content of the BIOS.

In order to spread it uses several means of transmission, but it does not use a specific method.

Visible Symptoms 

    

After CIH.1106 has infected a computer, various symptoms can be noticed:

  • When the computer is started up, the following message is displayed:

    "DISK BOOT FAILURE, INSERT SYSTEM DISK AND PRESS ENTER"
    This message indicates that the computer cannot be started. The reason for this is that CIH.1106 has formatted the hard disk.
  • If the computer is booted from another disk and then the C:/ drive is accessed, the following warning is displayed:

    "INVALID DRIVE SPECIFICATION"
    This means that the system does not recognize the hard disk because it is completely blank.