home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
Turnbull China Bikeride
/
Turnbull China Bikeride - Disc 1.iso
/
HENSA
/
VIRUS
/
INTERFERON.ARC
/
!Interfero
/
!Help
/
ReadMe
< prev
next >
Wrap
Text File
|
1992-03-13
|
8KB
|
179 lines
-----------------------------------------------------------------------------
THIS HELP READER WAS WRITTEN BY JORIS RÖLING AND SUBSEQUENTLY BORROWED!
-----------------------------------------------------------------------------
Interferon, v2.12 (13 Mar 1992, 1868 bytes) - © 1991,1992 Tor O. Houghton
Introduction:
Interferon is a medical term for a protein substance which prevents
the development of a virus in living cells. Consider your magnetic
media as living cells. Weird, ok. But nevertheless, if a virus first
manages to infect one file on it, you can be sure that in time, all
files will be infected (depending on the virus, of course). By files,
I mean files which can be executed, of the type Obey, Absolute,
Utility, and also files which do not have any type, but merely a
load and execution address.
To be able to infect a file, bytes have to be written to it. This
is usually done from special areas in memory - that is, if the
virus is a module. Most viruses these days lie dormant in the RMA
and wait for a certain type of action to take place before it infects
a file.
What Interferon does:
To put it simple, it watches what the Archimedes tries to do, and if
it detects a save from these areas, Interferon intercepts the call
and gives a suitable message to the user (you). You should then take
neccesary action to check if there really is a virus in memory.
Please do get suspicious if a message pops up while you are trying to
start an application, or if you just opened a directory with a lot
of applications in it.
PLEASE READ THE INFORMATION ABOUT THE CURRENT VERSIONS (SEE BELOW).
Current viruses which Interferon kills (in memory only):
CeBIT
Link
MyMod
NetStatus
NetManager
TrapHandler
Messages which Interferon gives:
1) WARNING: Interferon detected and intercepted a save from an area
defined as illegal. Clicking 'CANCEL' will save it as
'$.FAILED'.
If an attempt to save from the RMA or below &8000 is about to occur,
Interferon detects this and instead gives you the choice of either
letting it happen (clicking 'OK'), or intercepts the call and makes
the originator (a possible virus) save the file as '$.FAILED', so
that you may have a look at what was saved. To see how this works,
simply try to save the palette.
2) WARNING: For some reason Interferon failed to create the mentioned
file. However, the save was fully intercepted and negated.
This message might pop up if you already have a file with such a name
and if it is locked (if the originator tried a GBPB action).
3) WARNING: The <virus> has been found (killed).
Indicates that Interferon found a module connected to the virus named,
and also indicates that you should now do a hard-reset, boot from a
clean disc, and start searching for viruses. Please refer to The
Archimedes Virus Reference Document (by T. Houghton and A. Glover) for
details on viruses and various virus removal tools. This document is
regularly updated.
4) WARNING: Interferon has been called through its finalisation code
and will be killed. Click 'CANCEL' to invoke a hard reset.
If a program tried to kill Interferon (also happens if you load the
module while it already is resident in memory), this message will
appear. Clicking 'OK' will kill Interferon, but 'CANCEL' will reset
the machine and clear the memory.
Notes:
All non-Econet users are advised to *UNPLUG* all Net modules, as it
seems that these are the prime target for viruswriters these days.
By doing this, you can easily spot a new version, as it will have a
different position (its address will be 018xxxxx) if *RMLoaded, and
if created from memory (NetStatus performs an SWI OS_Module) it will
appear at the end of the module list.
Interferon only tries to detect a certain type of virus. This means
that viruses written in BASIC and/or are set up as (nameless) tasks
will not be detected as these usually save themselves from an area
which Interferon does not check for.
Also: Extensive swapping of software contributes to the spreading of
viruses.
You are strongly advised to include the Interferon module in your
!System folder if you have a harddisc and include it in your startup
sequence (needless to say, this should be the first module loaded).
Version history:
1.05 - The first release version (actually 1.05c).
1.06 - Second version to hit the public. Minor changes, but no bug
corrections.
1.07 - More changes. Is not compatible with Terje
'VirusKill' as he uses memory areas illegal to Interferon.
1.10 - Interferon will allow saves of less than 256 bytes, but will
pop up with a request window, asking for confirmation. I.e.
Interferon is now compatible with the palette utility.
2.00 - An all new handling of saving from the areas defined as
illegal. Now asks the user for confirmation, and if the user
doesn't wish the save to take place, Interferon saves the file
as '$.FAILED'. The user may then look at what actually was
saved from the 'illegal' areas. If a user knows what's
happening, there is now no problem to click 'OK' to allow the
action to proceed. (Which makes it compatible with Terje
Slettebø's 'VirusKill').
2.01 - Bugfix: Didn't work too well with PlaceIt. Fixed now, and
thanks to Ola Presterud for letting me know!
2.05 - Fixed 'Press space or mouse to continue' prompt when starting
the module from a non-wimp environment. It now merely displays
the name of the module along with the version. ("Interferon:
v2.05 installed.") Also added code to prevent suspicious
programs from killing Interferon. If something like this
happens while in the wimp environment, you are given the
choice of clicking 'CANCEL' to do a hard-reset, or 'OK' to
kill Interferon. If you are in a non-wimp environment, you may
still reset the machine while the 'Press space or click mouse
to continue' prompt is active (hit CTRL+BREAK!), as all current
operations are held at this point.
2.06 - Added 'close all open files' code before reset. I used to have
a Lingenuity interface once (take note!! ONCE), and remembered
that open files could cause disk errors. Now I use Morley!
2.08 - Fixed bug with *SCREENSAVE. Apparently *SCREENSAVE gets its
palette data from zero page! Weird?? Anyway - thanks to Claus
Nickelsen for pointing this out!
2.10 - Added code to kill LINK, NETMANAGER, CEBIT, MYMOD and
TRAPHANDLER viruses.
2.12 - REMOVED code to kill CEBIT virus. This virus has to be patched
first, and it is not withing the working area of Interferon to
do this. Sorry. (Get hold of Killer!)
Final note:
This piece of code is copyright, and should not be distributed
without this !ReadMe file. It is public domain, and as such, there
are certain rules to follow, i.e. don't distribute it for profit
etc. etc.
I would be most happy to receive a disc or two from any public
domain library which distributes this! :-)
My address is as follows:
Tor O. Houghton
Fjellveien 4
PO Box 142
1362 Billingstad
NORWAY
Tel: +47-(0)2-847569
Fax: +47-(0)2-848287
email: bhotvedt@gollum.uio.no (write 'For Tor Houghton' or something
like that in the subject or message area).
The World of Cryton: #121, +44 (0)749 679794/670030 / 300-14400bps
Excelsior! (M)BBS: +47 (0)2 846379 (CoSysOp!) / 300-14400bps
A message to Mr. Joris Röling:
I hope you don't mind me borrowing this text reader (it's wonderful!).