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AIDS

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For the HLLO version, see AIDS (HLLO).
Not to be confused with AIDS II or OlympicAIDS.

Virus.DOS.Aids is a parasitic virus on DOS.

There are 2 variants:

  • Virus.DOS.Aids.552
  • Virus.DOS.Aids.872

BehaviorEdit

They search for files in current directory, and then write themselves to the end of file.

Aids.552Edit

This is an encrypted memory resident variant, which infects EXE executable.

Aids.872Edit

This is a non-memory resident variant which infects DOS executable. The virus does not infect every file but it might corrupt them during infection. Files infected by this variant might cause a system hang or memory allocation error when run.

Memory usageEdit

The following table shows the memory usage of the variants.

Variant Memory usage in bytes
Aids.552 1,024
Aids.872 Non-TSR

PayloadEdit

Aids.552Edit

This variant displays a graphical effect when activated.

Aids.872Edit

When an infected program is run on the 10th day in any month, the virus hangs the system.

Other detailsEdit

There is a virus sharing the same name, HLLO.AIDS, which is an overwriting virus written in high level programming language.

Aids.872 contains the internal text string:

Aids

ReferencesEdit

Payload of AIDS.552, archive.org

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