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Panda Protection

Virus Encyclopedia

Welcome to the Virus Encyclopedia of Panda Security.

Encyclopedia GetVirusCard True 0

Chasnah.A

 
Threat LevelLow threatDamageHighDistributionNot widespread
Common name:Chasnah.A
Technical name:W32/Chasnah.A.worm
Threat level:Medium
Type:Worm
Effects:  

It prevents the files with an EXE, COM, PIF and SCR extension from being run, running itself instead, reduces the computer security and hides the files that has created in the affected computer. It spreads through shared resources and removable drives.

Affected platforms:

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

First detected on:July 21, 2007
Detection updated on:July 21, 2007
StatisticsNo
Proactive protection:
Yes, using TruPrevent Technologies

Brief Description 

    

Chasnah.A is a worm that prevents the files with an EXE, COM, PIF and SCR extension from being run. Whenever users run a file with any of these extensions, they will not be able to open it and Chasnah.A will be run.

Additionally, it reduces the computer security, as it ends processes belonging to programs related with security. This would leave the computer vulnerable against possible threats. It also hides the files that has created in the affected computer, in order to make its detection more dofficult and go unnoticed.

Chasnah.A spreads through shared resources and removable drives.

Visible Symptoms 

    

Chasnah.A is easy to recognize, as it shows the following symptoms:

  • When the computer is started, it displays the following image:

    Image displayed by Chasnah.A
    where a poem in Indonesian can be seen.
  • From time to time it opens the browser with the following website:

    Website displayed by Chasnah.A
>