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MacWorld: Hardware Guide 1994
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Macworld Interactive - Hardware Guide 1994 (PDO).iso
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Utilities
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Disinfectant
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Disinfectant.rsrc
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STR#_220.txt
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1994-03-11
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There are no significant differences between the two strains.
There are two known strains of the MBDF virus, MBDF A and MBDF B.
products.
strongly encourage other vendors to consider doing the same with their
detection of the virus, and has thus helped the entire Mac community. We
Macintosh software products. Their foresight resulted in an early
Special thanks to the people at Claris who included self-check code in their
not become alarmed if you see them with ResEdit or some other tool.
MBDF resources are a normal part of the Macintosh system, so you should
The MBDF virus is named after the type of resource it uses to infect files.
problems on infected systems.
“BeHierarchic” shareware program, and reports of other menu-related
We also have reports that the MBDF virus causes problems with the
to reinstall a new System file from scratch.
System file which cannot be repaired. The only solution in this situation is
the process of writing the System file very often results in a damaged
Mac is hung, so they do a restart. Restarting the Mac while the virus is in
attacks a system. The delay is so long that people often think that their
the virus takes quite a long time to infect the System file when it first
The MBDF virus is non-malicious, but it can cause damage. In particular,
become infected as soon as they are run on an infected system.
is infected as soon as an infected application is run. Other applications
usually infects the Finder and several other system files. The System file
The MBDF virus infects both applications and the System file. It also
the Trojan horse renders it ineffective and inoperable.
and returns the file to the state it was in before being infected. Repairing
infected by the MBDF virus. Repairing an infected file removes the virus
Disinfectant identifies both infected files and the Trojan horse as being
service.
charge for helping to spread the virus, and was sentenced to community
restitution of damages. A third student at Cornell also pleaded guilty to a
spreading the MBDF virus. They were sentenced to community service and
to charges of second-degree computer tampering for writing and
apprehended shortly after the virus was discovered. They pleaded guilty
Two undergraduate students at Cornell University were quickly
“tetris-rotating” was a Trojan horse which installed the virus.
In addition to these two games, a third game named “Tetricycle” or
games were named “10 Tile Puzzle” and “Obnoxious Tetris.”
period of time, so a number of people around the world were affected. The
popular Internet archive sites contained some infected games for a short
The MBDF virus was first discovered in Wales in February, 1992. Several
xThe MBDF Virus