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AJ

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Virus.DOS.AJ or AJ is a virus that runs on MS-DOS.

This virus has 3 versions:

  • Virus.DOS.AJ.390
  • Virus.DOS.AJ.391
  • Virus.DOS.AJ.793

PayloadEdit

AJ.390 & AJ.391Edit

AJ.390 & AJ.391 is a memory resident parasitic virus. It hooks INT 21h, and writes itself to the end of .EXE files that are executed. The header of infected files contains the word:

AJ

AJ.793Edit

AJ.793 is a virus. In February, starting from the 6th, it formats hard drive sectors. It also corrupts the anti-virus databases of ANTI-VIR.DAT and CHKLIST.MS.

MediaEdit

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