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- VIRUS-L Digest Monday, 16 Jan 1989 Volume 2 : Issue 16
-
- Today's Topics:
- Any connection between the ping-pong virus and WordPerfect? (PC)
- re:anti-viral encryption schemes
-
- ---------------------------------------------------------------------------
-
- Date: Mon, 16 Jan 89 16:33:29 IST
- From: "Eldad Salzmann (+972)-3-494520" <ELDAD@TAUNIVM.BITNET>
- Subject: Any connection between the ping-pong virus and WordPerfect? (PC)
-
- I am new to this list, I heard about it from Norbert Hanke after
- sending a query about some viruses I ran into in Israel. The query was
- sent both to Dist-Mic at RPICICGE and to RED-UG at TREARN. I'm
- repeating my query here for the sake of those who haven't read it. I
- will be very grateful if some of you, who feel that they are
- well-informed, will be able to enlighten me a little about this
- subject.
- * * *
- Originally entitled:
- Needed: A Virus Vademecum
-
- Recently I've encountered the formidable Bouncing Ping-Pong virus on a
- friend's hard disk. As far as I know, this is a "benign" virus, which
- does not cause any damage to files, but I'm not sure about that.
-
- I heard it resides on the root, but I'm not sure about that either
- (what does this imply? That it attacks the system files, the two
- hidden DOS files and/or the command.com?).
-
- Is a diskette totally safe when it is write-protected? I was sure
- about that, until I read some things which made me worry.
-
- How can one know that the antivirus program s/he received is really
- effective? I guess it's not possible to know that, the taste of the
- pudding is in the eating...
-
- Was WordPerfect infected by the omnipotent virus?
-
- I don't know whether it had anything to do with the following event,
- but... A WordPerfect which was till then working quite smoothly from
- the HD, sud- denly began to look at drive A: for its WP.exe file, and
- to complain that the diskette was write-protected. At first I thought
- that the virus had high expectations and aspired to enlarge its
- kingdom over the diskette files as well, but it then occurred to me
- that maybe WordPerfect needs to write something on the diskette (or
- the HD) when it loads, something like a tempo- rary file which is
- erased afterwards. Well, does it? And why does it need to load its
- main file from a diskette all of a sudden, after it worked so nicely
- from the HD?
-
- * * *
-
- Is there any panacea against viruses? And if not, are there any
- programs which counteract both the first known virus (in Israel it was
- the famous virus which appended itself to EXE and COM files,
- indicating its existence by the appearance of the string "SuMSDos"
- within the executable files) and the Bouncing Ping-Pong virus?
-
- Any comments will be appreciated. I sincerely hope there are people on
- this list who experienced some sort of a virus (or a Trojan horse) and
- survived, and now can share with me their experience.
-
- Eldad Salzmann <ELDAD@TAUNIVM.BITNET>
-
- ------------------------------
-
- Date: Mon, 16 Jan 89 12:20:20 EST
- From: Don Alvarez <boomer@space.mit.edu>
- Subject: re:anti-viral encryption schemes
-
- Homer W. Smith and others have been discussing program encryption as a
- method of defending against viruses. Before use, the program would be
- decrypted. Any virus which had attached itself to an application
- would become scrambled and neutralized when the application was
- decrypted.
-
- Sorry to disagree with you, but you have to be very careful that the
- "cure" isn't worse than the "disease". If you do daily backups, you
- can't loose more than 8 hours work. 30 seconds of decryption time 30
- times a day means in two months you waste 8 hours doing decryptions.
- Anyone who expects viral infections less frequently than once every
- two months is quite literaly wasting their time with this scheme.
- Consider instead just spending two minutes a day backing up your work.
- At this rate, you will have achieved a savings in time as long as you
- are infected at least once a year, and as a side benefit you are
- protected against power outages, head crashes, and disasterous typos.
-
- - Don Alvarez
-
- + ----------------------------------------------------------- +
- | Don Alvarez MIT Center For Space Research |
- | boomer@SPACE.MIT.EDU 77 Massachusetts Ave 37-618 |
- | (617) 253-7457 Cambridge, MA 02139 |
- + ----------------------------------------------------------- +
-
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- End of VIRUS-L Digest
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