Chinese.2311
Description Chinese.2311
It is not a dangerous memory resident encrypted parasitic virus. It hooks INT 21h and writes itself to the end of .COM and .EXE files that are executed or accessed by DOS function FindFirst/Next FCB (DIR command). Before installing memory resident the virus displays a message in Chinese.
Check other viruses! Be aware! Use Antiviral Software
GTM.BewareBug.1436
Description GTM.BewareBug.1436
This is a memory resident parasitic virus. It hooks INT 21h and on execution of programs they searches for COM and EXE files and writes itself to their ends.
It's a dangerous virus. On March, 20th it decrypts and displays the message:
Beware of the BUG !!!
Then it halts a computer.
Guerilla.1996
Description Guerilla.1996
It is a harmless memory resident parasitic polymorphic and stealth virus. It hooks INT 21h and writes itself to the end of EXE files that are closed. While opening an infected file the virus disinfects it, while searching for files (FindFirst/Next) the virus decreases the returned file length - these are virus stealth routines.
The virus does not infect several anti-viruses according to the string (two bytes per name):
TBVIAVNANEVSFIF-IMFVSCQBIV
When several file compressing utilities, anti-viruses and Windows are run, the virus disables its stealth routines. The list of these programs looks as follows: TBSCAN, TBSETUP, WIN, PKZIP, ARJ, RAR, LHA, ADINF.
While installing memory resident the virus scans the system memory for memory resident anti-viruses TBAV, NAV and NEMESIS. If one is found, the virus terminates its installation routine.
The virus also contains the text strings:
NACSBT NIW PUTESBT PIZKP JRA RAR AHL FNIDA
Guerilla 1996 PH
TB*NAVNEM
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