AGI-Plan (computer virus)

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AGI-Plan
Common name AGI-Plan
Technical name Month 2-4
Aliases Month 2-4, Agiplan
Family Zero Bug
Classification Virus
Type DOS
Subtype COM file, destructive
Isolation Unknown
Point of isolation Mühlheim an der Ruhr, Germany
Point of Origin Unknown
Author(s) Unknown

For information on the African consulting company, see Agiplan (company).

AGI-Plan was a memory resident DOS file infector first isolated at the Agiplan software company in Germany. Because of CARO standards that dictate that viruses should not be named after companies, AGI-Plan's technical name is Month 4-6. This name also violates CARO standards, but a more minor rule involving syntax. AGI-Plan is related to the Zero Bug virus, as both it and AGI-Plan prepend 1,536 bytes to files they infect.

AGI-Plan is not initially damaging until several months after the initial infection, hence its name. After activation, AGI-Plan will begin to corrupt write operations, which results in slow, difficult-to-notice damage overtime.

AGI-Plan is notable for reappearing in South Africa in what appeared to be an intentional re-release several years after. AGI-Plan never succeeded in spreading significantly beyond the isolated incidents in Germany and South Africa.

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