versions of the virus.

the B strain, there are only minor technical differences between the two

Other than the special code in the A strain which looks for and neutralizes



applications are infected by both strains and repairs them properly.

of the B strain and by the A strain. VirusScan reports that such

possible for an application to be infected by both the neutralized version

code which neutralizes any copies of the B strain which it encounters. It is

written before the A strain. The A strain of the virus contains special

months after the A strain, it appears that the B strain was actually

Even though the B strain of ANTI was not discovered until about 19



The string “ANTI” appears within the virus, hence its name.



cause problems.

damage other than spread itself. As with all viruses, however, it can still

As with the other viruses, ANTI does not intentionally attempt to do any



version, especially on old Macintoshes with the 64K ROMs.)

application may use memory slightly less efficiently than the original

the repaired application. The only effect of this error is that the repaired

know the values of the original attributes, so it leaves them cleared on

resource attributes of the CODE 1 resource. VirusScan has no way to

(For the technically inclined, the error in ANTI is that it clears all the



by an uninfected original copy. This is good advice in any case.

VirusScan, we recommend that you delete the repaired copy and replace it

problems with an application which was infected by ANTI and repaired by

and in almost all cases it does not cause any problems. If you experience

the uninfected original application. The damage is very minor, however,

words, the application as repaired by VirusScan is usually not identical to

in such a way that VirusScan cannot perfectly repair them. In other

There is an error in ANTI which causes it to slightly damage applications



used under System 6.

under System 6 when MultiFinder is used. It only spreads when Finder is

Due to a technical quirk, ANTI does not spread at all under System 7 or



application to become infected even if it is never run.

contagious than the Scores and nVIR viruses. It is possible for an

document files. It is less contagious than the INIT 29 virus, but more

files which resemble applications (e.g., Finder). ANTI does not infect

ANTI does not infect the System file. It only infects applications and other



1989. The ANTI B strain was discovered in September, 1990.

discovered in France. The ANTI A strain was discovered in February,

There are two known strains of the ANTI virus. Both strains were first




xThe ANTI Virus