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Text File | 1992-02-23 | 4.2 KB | 101 lines | [TEXT/McSk] |
- February 22, 1991
-
- Disinfectant 2.6 is a new release of our free Macintosh anti-viral
- utility.
-
- Version 2.6 detects the new MBDF virus and Trojan horse.
-
- The MBDF virus was discovered in Wales. Several popular Internet archive
- sites contained some infected games for a short period of time, so a
- number of people around the world were affected. The games were named
- "10 Tile Puzzle" and "Obnoxious Tetris."
-
- In addition to these two games, a third game named "Tetricycle" or
- "tetris-rotating" was a Trojan horse which installed the virus.
-
- Disinfectant identifies both infected files and the Trojan horse as
- being infected by the MBDF virus. Repairing an infected file removes
- the virus and returns the file to the state it was in before being
- infected. Repairing the Trojan horse renders it ineffective and
- inoperable.
-
- The MBDF virus is similar to the MDEF virus. It infects both applications
- and the System file. It also usually infects the Finder and several other
- system files. The System file is infected as soon as an infected
- application is run. Other applications become infected as soon as they
- are run on an infected system.
-
- The MBDF virus is non-malicious, but it can cause damage. In particular,
- the virus takes quite a long time to infect the System file when it first
- attacks a system. The delay is so long that people often think that their
- Mac is hung, so they do a restart. Restarting the Mac while the virus is
- in the process of writing the System file very often results in a damaged
- System file which cannot be repaired. The only solution in this situation
- is to reinstall a new System file from scratch.
-
- We also have reports that the MBDF virus causes problems with the
- "BeHierarchic" shareware program, and reports of other menu-related
- problems on infected systems.
-
- The MBDF virus is named after the type of resource it uses to infect files.
-
- MBDF resources are a normal part of the Macintosh system, so you should
- not become alarmed if you see them with ResEdit or some other tool.
-
- Special thanks to the people at Claris who included self-check code in
- their Macintosh software products. Their foresight resulted in an early
- detection of the virus, and has thus helped the entire Mac community.
- We strongly encourage other vendors to consider doing the same with their
- products.
-
- There are a few other minor changes in version 2.6:
-
- We improved the "busy file" error message. In particular, we no longer
- advise System 7 users to "try again without MultiFinder."
-
- The document was revised. In particular, we now mention more System 7
- issues in the main body of the document, not just in the special
- "System 7 Notes" section.
-
- In previous versions of Disinfectant, we recommending creating a special
- "virus tools" startup disk. With newer versions of the Mac system, and
- with System 7 in particular, this is no longer possible. The document has
- been revised appropriately.
-
- Disinfectant 2.6 is available now via anonymous FTP from site
- ftp.acns.nwu.edu [129.105.113.52]. It will also be available soon on
- sumex-aim.stanford.edu, rascal.ics.utexas.edu, comp.binaries.mac,
- America Online, CompuServe, GEnie, Delphi, BIX, MacNet, Calvacom,
- AppleLink, and other popular sources of free and shareware software.
-
- Macintosh users who do not have access to electronic sources of free and
- shareware software may obtain a copy of Disinfectant by sending a self-
- addressed stamped envelope and an 800K floppy disk to the author at the
- address given below. People outside the US may send an international postal
-
- reply coupon instead of US stamps (available from any post office). Please
- use sturdy envelopes, preferably cardboard disk mailers.
-
- People in Western Europe may obtain a copy of the latest version of
- Disinfectant by sending a self-addressed disk mailer and an 800K floppy
- disk to macclub benelux. Stamps are not required. The address is:
-
- macclub benelux
- Disinfectant Update
- Wirtzfeld Valley 140
- B-4761 Bullingen Belgium
-
- John Norstad
- Academic Computing and Network Services
- Northwestern University
- 2129 Sheridan Road
- Evanston, IL 60208 USA
-
- Internet: j-norstad@nwu.edu
-
- John Norstad
- Academic Computing and Network Services
- Northwestern University
- j-norstad@nwu.edu
-
-