HA.311
Description HA.311
It is not a dangerous nonmemory resident parasitic virus. It searches for .COM files and writes itself to the end of the file. Depending on the system timer it displays the word "HA".
Check other viruses! Be aware! Use Antiviral Software
Oksana.1881
Description Oksana.1881
This is a very dangerous nonmemory resident parasitic encrypted virus. The virus searches for COM files then writes itself to the end of the file. The virus do not infects the COMMAND.COM file, but the string comparing utility has a bug, and the virus do not infect C*.COM files. If the virus detects a file that has COM extension and EXE internal format, the virus overwrites that file with a program that displays the message in Russian. Some viruses of that family disinfect the host file before return.
On October 21 the viruses display the message:
HAPPY BIRTHDAY OKSANA
Depending on the generation or counters the virus reads into the system memory and then erases the FAT of the C: drive and displays the message in Russian. Then the virus wait for 3:00am and restores the FAT.
It displays:
CRAZY ! I~m here !
Ol.1562
Description Ol.1562
It is a harmless memory resident parasitic polymorphic virus. It hooks INT 21h and writes itself to the end of COM and EXE files that are executed. The virus does not manifest itself in any way. To detect its TSR copy while installing memory resident the virus uses INT 21h AH=DDh call, the memory resident copy returns "OL" in AX register.
|