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Alex

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

This virus has 4 versions:

  • Virus.DOS.Alex.368
  • Virus.DOS.Alex.598
  • Virus.DOS.Alex.599
  • Virus.DOS.Alex.818

Details

Alex.368

Alex.368 is a non-memory resident harmless virus.

It infects .COM files in a standard way (except COMMAND.COM).

The virus contains the text string:

The One Night Virus (C) Alex Hacker *.COM

The virus is not memory resident but copies small resident programs into the interrupt vector table. The first program erases text from screen by nice method some times after installation.

The second program writes byte FEh to port 60h (?).

Alex.598

Unknown

Alex.599

Alex.599 a non-memory resident parasitic virus.

It searches for .COM files and writes itself to the end of the file.

It contains the text string:

ALEX PATH=*.com

Alex.818

Alex.818 is a non-memory resident virus. It infects .EXE files in a standard way. The virus contains the text strings:

The Kite Virus (C) Alex Hacker *.EXE

The virus is not memory resident but copies small resident programs into the interrupt vector table. The first program erases text from screen by nice method some times after installation.

The second program writes byte FEh to port 60h (?).

Media

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