This virus has 3 versions:
AJ.390 & AJ.391
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.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.
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