Threat Description

CMD640X

Details

Aliases:CMD640X, Trojan.Cmd640x
Category: Malware
Type:
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

Once detected, the F-Secure security product will automatically disinfect the suspect file by either deleting it or renaming it.

More

You may wish to refer to the Support Community for further assistance. You may also refer to General Removal Instructions for a general guide on alternative disinfection actions.








Description Created: Mikko Hypponen, F-Secure


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