BachKhoa.4426
Description BachKhoa.4426
This is a very dangerous memory resident encrypted parasitic virus. It uses anti-debugging tricks in its code. When an infected file is executed, the virus hooks INT 21h, stays memory resident and then writes itself to the end of COM and EXE files that are accessed.
The virus deletes the anti-virus and other data files: CHKLIST.MS, CHKLIST.CPS, FILESIGN.SAV, FILE_ID.DIZ. On November 25 it also erases the hard drive sectors. It contains the text strings:
Ha Noi University of technology
Your PC was infected by BACH KHOA virus version 2.5
Check other viruses! Be aware! Use Antiviral Software
Gorilla
Description Gorilla
This is a dangerous, memory resident boot virus. It hooks INT 13h, and writes itself to the boot sectors of floppy disks and to the MBR of the hard drive. It infects floppy drives that are accessed, and writes itself to the MBR sector upon loading from an infected floppy disk. In September, the virus erases the CMOS memory.
Gorinich.776
Description Gorinich.776
It is a harmless memory resident parasitic virus. It hooks INT 21h and writes itself to the end of COM- and EXE-files that are executed. It contains partly encrypted text string:
Zmey Gorinich v0.04 RAU
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