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- From: rslade@sfu.ca
- Newsgroups: comp.virus
- Subject: CHRISTMA: The "Card"! (CVP)
- Message-ID: <0018.9211101943.AA07075@barnabas.cert.org>
- Date: 6 Nov 92 20:21:47 GMT
- Sender: virus-l@lehigh.edu
- Lines: 60
- Approved: news@netnews.cc.lehigh.edu
-
- HISVIRH.CVP 921022
-
- CHRISTMA EXEC - the card
-
- In December of 1987 IBM mainframe computers in Europe, connected via
- the EARN network, experienced a "mailstorm". Such events are fairly
- common on the "internetworks", caused by mailer problems,
- incompatibilities, or even "autoanswer" daemons replying to messages
- from unmoderated "distribution lists". This particular mailstorm,
- however, was of unprecedented severity. It shut down whole sections
- of the net, at least as far as effective work was concerned.
-
- For many, probably for most, users, email is simply text. A select
- group are involved with the exchange of programs or other binary
- files, often UU or XXencoded and sent through email systems, and
- often "imbedded" within messages as a greater or lesser portion.
- Some users have these facilities provided for them, through systems
- that are configured with these functions. (NeXT users have these
- functions in automated form, for example, and also have a reputation
- for not knowing how they work, cross-posting incomprehensible
- garbage to distribution lists and newsgroups.) IBM mainframe users
- often have such functions provided through PROFS and an interpreter
- language called REXX. Programs in REXX are called EXECs.
-
- The CHRISTMA EXEC was a message that contained such a program.
- "Christmas card" messages with this system can be more than just the
- usual "ASCII tree". (Perhaps, since this deals with IBM mainframes,
- I should use the more generic "typewriter picture". Anybody
- remember what a typewriter was? :-) These messages could include
- forms of animation such as asterisk snowflakes falling on a winter
- scene, or a crackling fire from a yule log. The message header
- contained a note that "Browsing this message is no fun at all. Just
- type Christmas .." which was intended to stop people from trying to
- read the "source code" of the message, but it is unlikely that few
- would even think to do so.
-
- Typing either "Christmas" or "Christma" would generate the "card".
- It really wasn't anything special, a very simplistic conifer shape
- made out of "X"s. (Mine is *way* better :-) At least on the
- surface. However, at the same time that it was displaying the tree
- on the screen, it was also searching for the NAMES and NETLOG files
- associated with the user's account. This provided a list of other
- users that either sent mail to or received mail from this account.
- The important thing was that it was a list of valid email addresses.
- The CHRISTMA EXEC would then mail copies of itself to all of these
- accounts.
-
- The important point, technically, was that all of the accounts were
- valid. As a side benefit, all of those accounts would be used to
- receiving mail from the account that had just read it. And they
- would tell 40 friends, and they would tell ...
-
- copyright Robert M. Slade, 1992 HISVIRH.CVP 921022
-
- ==============
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- Institute for Robert_Slade@sfu.ca | making of books there is
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