135 lines
5.5 KiB
Plaintext
135 lines
5.5 KiB
Plaintext
ÚÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ¿
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³ VIRUS REPORT ³
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³ Brain Virus ³
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ÀÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÙ
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Synonyms: Pakistani, Pakistani Brain, Basit Virus.
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Date of Origin: January, 1986.
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Place of Origin: Lahore Pakistan.
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Host Machine: PC compatibles.
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Host Files: Remains resident. Infects floppy disk boot sector.
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OnScreen Symptoms: None. Use DIR to find a volume label on an infected
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floppy: "(c) Brain". Using a sector editor, you should be able to find
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"(c) Brain" in sector 0, as well.
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Increase in Size of Infected Files: n/a.
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Nature of Damage: Resident, taking 3-7K of RAM. Corrupts or overwrites
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boot sector.
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Detected by: Scanv56+, F-Prot, IBM Scan, Pro-Scan.
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Removed by: CleanUp, MDisk, F-Prot, or DOS SYS command.
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Derived from: This virus appears to be "an original."
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Scan Code: 8C C8 8E D8 8E D0 BC 00 F0 FB A0 06 7C A2 09 7C 8B 0E 07 7C 89
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0E 0A 7C E8 57 00. You can also search at 15EH for 8B 0E 07 7C 89 0E 0A 7C
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E8 57.
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This virus originated in January, 1986, in Lahore Pakistan, but the
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first noticeable infection problems did not surface until 1988<Note: In
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the spring of 1988, for instance, 100 machines at The Providence
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Journal-Bulletin were infected with it.>.
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The Brain is unusual in that it includes the valid names, address and
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phone numbers of the original perpetrators. It was written by two
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brothers running a computer store in Lahore Pakistan. According to some
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sources, Basit Farooq Alvi (one of the brothers) wrote the virus so that
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it would infect machines running bootleg copies of a program he was
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selling for physicians. The original Brain put a copyright notice in the
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directory of floppy disks, but did no other damage to floppy disks, and
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would not infect hard disks.
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This virus consists of a boot sector and three clusters (6 sectors)
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marked as bad in the FAT. The first of these sectors contains the
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original boot sector, and the rest contain the rest of the virus. It
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only infects 360K floppies, and it occupies 7K of memory.
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The original Brain will infect a diskette whenever the diskette is
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referenced. For example, a DIR command, executing a program from the
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diskette, copying a file from or to the diskette or any other access will
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cause the infection to occur. The virus stores the original boot sector,
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and six extension sectors, containing the main body of the virus, in
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available sectors which are then flagged as bad sectors. Diskettes have
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3K of bad sectors (possibly more, if there are genuinely bad sectors, as
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well.)
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The Brain causes no known intentional damage. However, it can slow
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diskette access a bit, and may cause time-outs, which can make some
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diskette drives unusable.
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Any attempts to examine the boot sector are likely to be intercepted
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by the Brain when it is memory resident, redirecting the "view" to the
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relocated boot sector. Thus, programs like the Norton Utilities will be
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unable to "see" the virus.
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There are a number of unused character strings which can be used to
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identify it:
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Offset 0010H:
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Welcome to the Dungeon
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(c) 1986 Basit & Amjad (pvt) Lt
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d. BRAIN COMPUTER SERVICES..730 NI
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ZAM BLOCK ALLAMA IQBAL TOWN LAHOR
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E-PAKISTAN..PHONE :430791,443248,280530.
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Beware of this VIRUS.....Contact us for vaccin
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ation............... $#@%
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Offset 0202H:
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(c) 1986 Basit & Amjads (pvt) Ltd
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Offset 0355H:
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(c) 1986 Basit & Amjads (pvt) Ltd
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Offset 04A6H:
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(c) Brain $
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Infected diskettes are noticeable by "@BRAIN" or "(c) BRAIN"
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displayed in the volume label. Derivations can infect hard disks, and
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some have had the "(c) Brain" label removed, to make detection more
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difficult.
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ÉÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ»
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º This document was adapted from the book "Computer Viruses", º
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º which is copyright and distributed by the National Computer º
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º Security Association. It contains information compiled from º
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º many sources. To the best of our knowledge, all information º
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º presented here is accurate. º
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º º
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º Please send any updates or corrections to the NCSA, Suite 309, º
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º 4401-A Connecticut Ave NW, Washington, DC 20008. Or call our BBS º
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º and upload the information: (202) 364-1304. Or call us voice at º
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º (202) 364-8252. This version was produced May 22, 1990. º
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º º
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º The NCSA is a non-profit organization dedicated to improving º
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º computer security. Membership in the association is just $45 per º
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º year. Copies of the book "Computer Viruses", which provides º
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º detailed information on over 145 viruses, can be obtained from º
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º the NCSA. Member price: $44; non-member price: $55. º
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º º
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º The document is copyright (c) 1990 NCSA. º
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º º
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º This document may be distributed in any format, providing º
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º this message is not removed or altered. º
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ÈÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍͼ
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