CMD640X

Threat description

Details

Category:
Platform: W32

Summary

During early 1995, many PC users were confronted with a mystical "Pox on you" -message which appears on the computer's display when the machine was booted. When the matter was examined, the message was traced to an IDE driver file called CMD640X.SYS. The file comes with CMD PCI IDE drivers.

The message is not caused by a virus, nor has the original program file been tampered in any way. Rather, it seems that the driver's programmer has added a Trojan Horse routine to CMD640X.SYS as a "joke".

CMD640X.SYS activates randomly. It keeps printing the following message on the screen for a while, after which it crashes the computer.

     A poX oN yOu!! yoU wiLl bUrN iN tHe fiReS of HeLl!! A poX         oN yOu!! yoU wiLl bUrN iN tHe fiReS of HeLl!! A poX oN         yOu!! yoU wiLl bUrN iN tHe fiReS of HeLl!!  

The only way to eliminate this nuisance is to install a sanitized version of the CMD driver into the computer.



Removal

Automatic action

Depending on the settings of your F-Secure security product, it will either automatically delete, quarantine or rename the suspect file, or ask you for a desired action.

More scanning & removal options

More information on the scanning and removal options available in your F-Secure product can be found in the Help Center.

You may also refer to the Knowledge Base on the F-Secure Community site for more information.

Contact Support

F-Secure customers can request support online via the Request support or the Chat forms on our Home - Global site.







Description Details: Mikko Hypponen, F-Secure


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