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Virus.DOS.Lokjaw.Kenson is a dangerous memory resident file companion virus on DOS.

There are 2 variants:

  • Virus.DOS.Lokjaw.Kenson.573
  • Virus.DOS.Lokjaw.Kenson.887

BehaviorEdit

When the virus is loaded into memory, it looks for any EXE executable that is run, and then it places a DOS executable having the same name by copying itself into it. No files will be infected.

Due to priority of running executables on MS-DOS, when the user runs the same program again, the virus will run first.

Memory usageEdit

The following table shows the memory usage of the variants.

Variant Memory usage in bytes
Lokjaw.Kenson.573 4,096
Lokjaw.Kenson.887 4,096

PayloadEdit

The virus triggers when the user attempts to run the antivirus program MSAV or MWAV.

Lokjaw.Kenson.573Edit

This variant crashes the system by accessing an invalid part of memory when MSAV or MWAV is run, and no companion files will be added.

Lokjaw.Kenson.887Edit

When MSAV or MWAV is run, instead of placing companion files, the virus deletes the program and turns the screen black, followed by hanging the system. A hard reset must be taken after this.

Other detailsEdit

Lokjaw.Kenson.573 contains the internal text strings:

[ Its the  KenSON III  virus ]
EXE
COM
For My Very Best Friend
...By Lobo 435 of Covina CA...

Lokjaw.Kenson.887 contains the internal text strings:

KenSON V - Lobo/435  BF!  :)
BstFrnd
EXE
COM
For My Best Friend, the Fifth in a Series!!!

See alsoEdit

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