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- ┌─────────────────────────────┐
- │ VIRUS REPORT │
- │ 405 Virus │
- └─────────────────────────────┘
-
- Host Machine: PC compatibles.
-
- Host Files: Overwriting, non-resident. Infects
- COM (and possibly EXE) files.
-
- Increase in Size of Infected Files: If file is
- shorter than 405 bytes, it is replaced with the 405 byte virus. If
- longer than 405 bytes, the first 405 bytes are overwritten.
-
- Nature of Damage: Overwrites COM files.
-
- Detected by: ScanV46+, F-Prot, IBM Scan.
-
- Removed by: Scan/D, F-Prot, or delete the infected files.
-
- Scan Code: B8 00 00 26 A2 49 02 26 A2 4B 02
- 26 A2 8B 02 50 B4 19 CD 21 26 A2 49 02 B4 47 04 01. You can
- search at offset 00AH for 26 A2 49 02 26 A2 4B 02 26 A2.
-
- This virus overwrites the first 405 bytes of a COM file in the
- current directory. If the length of the file to be infected is less than
- 405 bytes, the length is increased to 405. Due to coding errors, the
- virus unsuccessfully attempts to infect in other than the current
- directory. The virus is not able to recognize an infected file. Thus it
- will re-infect a file again and again. However, because it overwrites
- the first 405 bytes, the infected files do not grow in size. It is
- similar to the Virus 1.1 published in Ralf Burger's book.
-
-
- ╔════════════════════════════════════════════════════════════════════╗
- ║ 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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