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Virus.DOS.PZ is a very dangerous memory resident parasitic encrypted virus on DOS.

There are 2 variants:

  • Virus.DOS.PZ.826
  • Virus.DOS.PZ.955

BehaviorEdit

When the virus is in memory, it infects any executable file that is run, and the infection size of EXE files is 17 bytes longer than that of COM.

Memory usageEdit

The following table shows the memory usage of the variants.

Variant Memory usage in bytes
PZ.826 1,664
PZ.955 1,920

PayloadEdit

The virus activates when any program is run on Friday 13th. It displays a screenful of message in black color with red background, erases disk sectors and hangs the system.

PZ.826Edit

It displays the following:

I'm virus Johnny! Now your Hard disk is destroyed. You can restart the computer.

PZ.955Edit

It displays the following:

I'm virus Angel! Now your Hard disk is destroyed. You can restart the computer.

Other detailsEdit

There are other 2 variants under this family:

  • Virus.DOS.PZ.Hanko.1444
  • Virus.DOS.PZ.Hanko.1531

The virus contains the internal text string:

pz

VideosEdit

Virus.DOS01:37

Virus.DOS.PZ-0

PZ virus review by Alles Sandro

Virus.DOS01:58

Virus.DOS.PZ

PZ virus review by danooct1

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