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1990-12-04
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8KB
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202 lines
Documentation for AVSearch 2.21 (well sort of)
What - another virus search program? From West Germany? Do they
have computers over there? Yes, we have and we've viri too.
I've seen too much misinformation of the users in the past on
both sides of the ocean. Either through the press (that's what I
call the 'hyper dyper gamma virus', or straight misinformation
(the virus survives in CMOS, the virus will write to a protected
diskette or the virus is using a modem subcarrier).
AT FIRST. DON'T PANIC just in case you were hit. Based on my
expirience, it is much more likely that you'll have another
hardware/program error than a virus.
This program is a night time quick hack of our programmer,
Detlev Hoppenrath and me some time ago. We stripped down the
removing parts of our main and comercial virus remover 'ANTIVIR'
and played around with the user interface. While it has some
bugs, I think I can live with it and so can you can live with
the bugs, too. This is in no way a polished program and
documentation (BTW, I do have to say thanks to the ASP, I get
the dIsclaimer section from there - have YOU paid for your
shareware programs?), so I think it will not meet ASP standards.
This program searches for known virus strings within programs or
supplied file names. I'm using the word search here, trying to avoid
the word s..n, since ... well that's another story. I would like
to say thank you to Rob Rosenberger, for encouraging me to place
this program on CI$, Ross M. Greenberg for his marvelous
Flu_Shot program (Have you registered your copy?) and everybody
else placing/sharing programs and ideas onto CI$. I'm learning
every day! (If CI$ wasn't so expensive from abroad, even with
the European access). Special thanks to Mr. King of the
commandline and the other cohorts from BProgA and PCVENB,
section 6. Turbo has become much easier with their help.
AVSearch will recognize a couple of viri, and some more than
other programs, while some other programs may recognize other
viri. As far as I know, there are five or six new virus
currently in the works. We're updating our comercial program
first and MAYBE later this program. You need DOS 3.0! and about
120 KB of free memory. Start this program by typing it's name
with '/H' as the parameter on the command line. If you ever have
to put more than one parameter on the command line, please don't
forget to put a space between the parameters. Our command line
parsing is not powerful and not foolproof.
If you would like to check your whole drive c: AVS c:\ /s. This
will test your .COM .EXE .SYS and some more files. AVSearch will
give the number of viri found back in the errorlevel. An
Errorlevel of 255 is given back on an internal error.
AVSearch does not work on networks, since it crashed mine.
AVSearch is checking for networks and refuses to run. The
AVSCrc program performs a self check, as AVSearch, and computes
four different CRC's. You may give one filename as a file to be
CRCed, don't use wildcards.
If you really like, you can send me a copy of your virus, if
AVSearch found one. I'm happy to see if our main program
'ANTIVIR' can remove it! If AVSearch does not recognize your
virus, please send or eplex me the file anyway. I can send you
an update to this program, if you would like.
What are the VIRCOM.COM and VIREXE.EXE files doing. They are my
'Jump Files'. These two files are simply do nothing files. Some
viri won't jump on small files, so I created some medium sized
files to let a virus 'jump' on it. And, given a file size for
10000 Bytes, it's easy to calculate the virus length. If you
would like to send me a boot sector virus, you should use debug
to save the boot sector data into a file. If the virus is on
your hard disk, please format a system disk in drive a:. The
virus is now on the freshly formatted disk.
debug bootsec.vir
; debug will probably say file not found
l 100 0 0 1 ; loads first three sectors of disk in A:
r cx ; display content of cx
:200 ; and modify it
w ; write back to file
q ; quit debug
Send me that file!
(Happy U.S. for this disclaimer - we're not allowed to have
something like this in West Germany)
DISCLAIMER - AGREEMENT
Users of AVSearch must accept this disclaimer of warranty:
"AVSearch is supplied as is. The authors disclaims all
warranties, expressed or implied, including, without limitation,
the warranties of merchantability and of fitness for any
purpose. The authors assumes no liability for damages, direct
or consequential, which may result from the use of AVSearch."
AVSearch is a "shareware program" and is provided at no charge
to the user for evaluation. And well, the evaluation period is
almost undefinite for this revision of AVSearch, since we don't
want to make any money from (yet, maybe later). Feel free to
share it with your friends, but please do not give it away
altered or as part of another system. The essence of
"user-supported" software is to provide personal computer users
with quality software without high prices, and yet to provide
incentive for programmers to continue to develop new products.
You are encouraged to pass a copy of AVSearch along to your
friends for evaluation. This program and support files may not
be distributed within Europe without the written consense from
the author from 'Shareware vendors'. Some gave this program away
in a self extracting file - and I got the calls when this file
WAS infected.
Ah, final note, if I've done some errors, typos, wrong
translation or put some other errors into this package, and I'm
sure I have, don't be angry. English is only my second language.
And througout this text I'm using the word VIRUS when it may be
a trojan horse.
Have a nice day, happy haunting and may the anti virus force be with you!
Tjark Auerbach
H+BEDV Datentechnik GmbH
Olgastr. 4
D-7992 Tettnang
West Germany
CI$: 71310,3143
BIX: (I don't use it, they don't have TAPCIS over there)
FAX: ++49 7542 52510
TEL: ++49 7542 6353 (Please speak slowly, we're not perfect)
BBS: ++49 7542 52110 (maybe some time in March 90)
Known bugs:
Yes, there are some. We will work on AVSearch on an as available
basis, if activity on ANTIVIR and new products is low! But
please report bugs and suggestions to me. Really, even ANTIVIR
has become (ADVERTISMENT) one of Germany's best anti virus tool.
- User screen colors are not saved and restored on exit.
- Memory routine may sometimes find its own serach strings, that's
a dinner bell!
- Your bug, please report to me, thank you.
Additions to 2.18 (EII)
Added /B Parameter - Batch mode. n this mode AVSearch will work
without any user action and give back errorlevel
Modified /E Parameter - Extended mode. In this mode, all known
virus strings are compared against the specified files. This
means, that you're testing signatures of boot sector viri or
memory viri against normal program files. This may lead to false
alarms in case of boot sector signatures in program files. If
you get a virus warning with /E enabled and no warning without,
then it is probably NO VIRUS.
Background: We gave a public domain version of AVSearch to a
virus-special magazine in Germany. The /E parameter wasn't fully
documented in this version of AVSearch (VirSuch). We got a
couple of telephone calls.
Added /BW Parameter - Black & White mode. Useful for my laptop.
Additions to 2.19
New viri added
Additions to 2.20
New viri added, most of them from the Eastern Block countries.
We've also added a memory check for some viruses which requires
us to do so. AVSearch is still not sold and recognises 135
different virus strains, not counting the similarities within
the strains.
Additions to 2.21
New viri added, AVSearch will now recognize 144 different virus strains
Additions to 2.22
New viri added, AVSearch will now recognize 158 different virus strains
Additions to 2.23
Small improvment d