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Hackers Underworld 2: Forbidden Knowledge
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VIRUS
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EUROPEAN.TXT
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1989-10-21
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Please find enclosed a list of known viruses in the UK prepared by
Joe Hirst of the BCVRC, he is happy that it be distributed as widely
as possible.
Of great interest is the new Fu Manchu variant of the Israeli virus,
a virus with a slightly embarassing manipulation task!
Ps. Joe doesn't have a mail box to date but I will relay any requests,
comments or information you pass on.
D.Ferbrache
European co-ordinator
Comp.Virus
IMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM;
: Joe Hirst British Computer Virus Research Centre :
: 12 Guildford Street, Brighton, East Sussex, BN1 3LS, England :
: Telephone: Domestic 0273-26105, International +44-273-26105 :
: :
: List of known PC viruses :
: :
: This list is intended to give enough information to identify a virus :
: or a variant form of a virus. It is not intended by itself to supply :
: enough information for a programmer to deal with a virus. If any virus :
: is found which does not exactly match any of the following descriptions :
: the Centre requests that a copy of the virus be sent to us, or to a :
: local researcher known to be in contact with us. :
HMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM<
1. 405
Parasitic virus - overwriting
Type description:
Virus occurs overwriting the first 405 bytes of a COM file. The virus
will attempt to infect one COM file on a different disk to the current
one. If the length of the file to be infected is less than 405 bytes,
the length will be increased to 405. Due to mistakes in the code it is
not able to infect other than in the current directory, nor is it able
to recognise an infected file.
-----------
2. Brain
Boot virus - floppy only
Type description:
This virus consists of a boot sector and three clusters (6 sectors)
marked as bad in the FAT. The first of these sectors contains the
original boot sector, and the rest contain the rest of the virus. It
only infects 360K floppies, and it occupies 7K of memory. It creates a
label on an infected disk of ' (c) Brain '. There are a number of
unused character strings which can be used to identify it:
Offset 0010H:
' Welcome to the Dungeon '
' (c) 1986 Basit & Amjad (pvt) Lt'
'd. BRAIN COMPUTER SERVICES..730 NI'
'ZAM BLOCK ALLAMA IQBAL TOWN LAHOR'
'E-PAKISTAN..PHONE :430791,443248,280530. '
' Beware of this VIRUS.....Contact us for vaccin'
'ation............... $#@%$@!! '
Offset 0202H
'(c) 1986 Basit & Amjads (pvt) Ltd '
Offset 0355H
' (c) 1986 Basit & Amjads (pvt) Ltd'
Offset 04A6H
' (c) Brain $'
Variations:
All the variations we have so far seen have only involved changes to
these character strings.
(1) Offset 0010H:
'Welcome to the Dungeon (c) 1986 D.C.L', 17H, '&'
' Amjads (pvt) Ltd VIRUS_SHOE RECORD v9.0 '
'Dedicated to the dynamic memories of millions of'
' virus who are no longer with us today - Thanks '
'GOODNESS!! BEWARE OF THE er..VIRUS : \thi'
's program is catching program follows after'
' these messeges..... $#@%$@!! '
Offset 0202H
'(c) 1986 Brain & Amjads (pvt) Ltd '
Offset 0355H
' (c) 1986 Brain & Amjads (pvt) Ltd'
Offset 04A6H
' (c) ashar $'
(2) As variation 1 except 'D.C.L' is changed to 'Brain' in string at offset
0010H
(3) As variation 2 except 'Brain' is changed to 'Jork ' in string at offset
0202H
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3. Cascade - AKA 1701, 1704
Parasitic virus - resident
Type description:
The virus occurs attached to the end of a COM file. COM files increase
in length by 1701 bytes. The first three bytes of the program are
stored in the virus, and replaced by a branch to the beginning of the
virus. The virus is encrypted (apart from the first 35 bytes) using an
algorithm that includes the length of the host program, so every sample
looks different. It becomes memory-resident when the first infected
program is run, and it will then infect every COM file run (even if the
file has an EXE extension). If the system date is between October and
December 1988 the cascade display will be activated at random
intervals. The virus tests the BIOS for the string 'COPR. IBM', and
will not infect if it finds this - however there are errors in the code
which prevent it from working. Because recognition depends on the
length of the virus, it will infect programs already infected by
variants with different lengths.
Variations:
(1) COM files increase in length by 1704 bytes. The only differences are
the removal of a conditional jump (which would never have been taken),
and some necessary segment overrides on the BIOS tests missing in the
previous version. There is still a mistake preventing an IBM machine
from being recognised.
-----------
4. Datacrime - AKA 1168
Parasitic virus - non-resident
Type description:
The virus occurs attached to the end of a COM file. COM files increase
in length by 1168 bytes. The first three bytes of the program are
stored in the virus, and replaced by a branch to the beginning of the
virus. The virus will search through full directory structure of the
disks (in the order C, D, A, B) for a COM file other than COMMAND.COM.
It will also ignore any COM file if the 7th letter of the name is a D.
If the date is after 12 October (any year) it will display the message:
'DATACRIME VIRUS'
'RELEASED: 1 MARCH 1989'
and do a low level format on track zero, all heads, of the hard disk.
Due to mistakes in the code the system is almost certain to crash the
first time the critical error handler is invoked after the virus
terminates.
-----------
5. Dbase [report only - no sample]
Parasitic virus - resident
Type description:
Infects COM and EXE files. Transposes random bytes of any open .DBF
file, keeping a record of which bytes in a hidden file (BUG.DAT) in the
same directory. The virus restores these bytes if the file is read.
If the BUG.DAT file is 90 days old or more the FAT and root directory
are overwritten.
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6. Den Zuk - AKA Search [report only - no sample]
Boot virus - floppy only
Type description:
Graphics display of 'DEN ZUK', together with the AT&T logo, slides in
from the sides of the screen on bootup. After five such bootups the
disk is trashed - no details of how.
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7. Fu Manchu
Parasitic v