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- ┌─────────────────────────────┐
- │ VIRUS REPORT │
- │ Cascade-B │
- └─────────────────────────────┘
-
- Synonyms: 1704-B, 1701-B, Blackjack virus
-
- Host Machine: PC compatibles.
-
- Host Files: Remains resident. Infects COM files.
-
- OnScreen Symptoms: There is no cascade display on the screen for this
- version. The system will reboot at random intervals after activation.
-
- Increase in Size of Infected Files: 1701 bytes (will infect both PCs and
- compatibles) or 1704 bytes (will infect only PC compatibles).
-
- Nature of Damage: Affects system run-time operation. Corrupts program or
- overlay files.
-
- Detected by: Scanv56+, F-Prot, IBM Scan, Pro-Scan.
-
- Removed by: M-1704, M-1704C, CleanUp, or F-Prot. You may also follow the
- instructions for removing the Jerusalem virus.
-
- Derived from: Cascade.
-
- Scan Code: Uses self-encryption. FA 8B EC E8 00 00 5B 81 EB 31 01 2E F6
- 87 2A 01 01 74 0F 8D B7 4D 01 BC 85 06 31 34 31 24 46 4C 75 F8. You can
- also search at offset 01BH for 31 34 31 24 46 4C 77 F8.
-
- This virus is identical to the Cascade except for these two changes:
-
- * it activates in the fall of any year;
-
- * the cascading display has been replaced with a system re-boot when
- the virus activates.
-
- The activation uses the same interrupt 8 randomization algorithm, so
- the reboot will occur at a random time interval after executing an
- infected program on or after the activation date.
-
- This virus has the ability to infect a file more than once. Cleanup
- works well at removing the virus, even from files infected multiple
- times (Cleanup will have to be run the same number of times that the file
- is infected). Be warned though, if you find a file has been infected more
- than once, remove the virus and delete the file, as files infected more
- than once will hang your computer. Files infected only once by this virus
- seem to run OK after removing the virus.
-
-
- ╔════════════════════════════════════════════════════════════════════╗
- ║ 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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