Virus Database

Rev.4096

Description Rev.4096

It is a dangerous memory resident parasitic polymorphic virus. It hooks INT 21h and writes itself to the end of .COM files that are accessed. The virus uses undocumented DOS calls and as a result does not work under DOS 7 (Windows95). In October on Sundays the virus displays the message:
These things saith he that hold TASM in his right hand and walketh
amongst the FAT tables, boot sectors, and partition tables.
He that hath a VDU, let him see what I typeth unto the users:
I have a few things against thee, because thou sufferest that whore
software security, and commit anti-virus protection.
Behold, I will cast thou unto limbo, and them that repent their
deeds shall be spared the low-level drive format.
Remember therefore how thou hast recieved and heard, and hold fast,
and repent. If therefore thou shalt not repent, I will come on thee
as a thief, and thou shalt not know what hour I will come upon thee.
- Revelation Alpha.

The virus also contains the text strings:
Genesis
Revelation Virus Alpha
Exodus
Copyright (c) 1991 by Transvisionary

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Jackal

Description Jackal

Jackal is a dangerous memory resident multipartite virus. On execution of infected file it traces INT 13h, 15h, 21h, 40h and then hooks them. Then this virus hits MBR of hard drive, it changes the address of active boot sector and writes itself at this address. On system booting the virus body will be executed instead of original boot sector. Then this virus writes itself at the end of COM- and EXE-files that are accessed.
Sometimes it calls trigger routine, this routine formats the hard drive sectors. The virus hooks INT 9 (keyboard) also and on Alt-Ctrl-Del pressing it tries to stay memory resident after rebooting: it restores the interrupt table, clears the screen e.t.c.
This virus contains the internal string "JaĻckĻal".

Jackel Family

Description Jackel Family

These are dangerous memory resident parasitic viruses. They hook INT 21h and writes itself to the end of .COM files that are executed.
Jackel.654
Depending on the system time it beeps by internal system speaker and halts PC. It contains the strings:
DH
_àcKèL

Jackel.713
It copies itself to the memory at the address 8000:0100, and does not fix MCB list. It might halt PC. While infecting this virus disables some anti-virus monitors like TBSCAN and VSAFE. It deletes the files:
TI-VIR.DAT
CHKLIST.CPS
*._??
SCANVAL.VAL

It also contains the text string:
_àcKèL5Version 5.0a

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