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