BachKhoa.3544
Description BachKhoa.3544
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 BACHKHOA virus
Check other viruses! Be aware! Use Antiviral Software
AJ family
Description AJ family
These are harmless memory resident parasitic viruses. They hook INT 21h, and write themselves to the end of EXE files that are executed. The header of infected files contains the word:
AJ
"AJ.793" is a very dangerous virus. In February, starting from the 6th, it formats hard drive sectors. It also corrupts the anti-virus databases of ANTI-VIR.DAT and CHKLIST.MS.
Akuku.1111
Description Akuku.1111
This is a not dangerous non-memory resident parasitic virus. On execution it searches for COM and EXE files and writes itself at the file ends.
The viruses display the messages:
Sorry, I'm copmpletly dead.
The virus also plays a tune.
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