Trieda Virus

Virus Name: Trieda Aliases: Trieda.851 V Status: New Discovered: January, 1996 Symptoms: .EXE file growth Origin: Unknown Eff Length: 851 Bytes Type Code: PNE - Parasitic Non-Resident .EXE Infector Detection Method: ChAV, AVTK, IBMAV, ViruScan, NAV, NAVDX, PCScan, Innoc, AVTK/N, IBMAV/N, NShld, NAV/N Removal Instructions: Delete infected files General Comments: The Trieda or Trieda.851 virus was received in January, 1996. Its origin or point of isolation is unknown. Trieda is a non-resident direct action infector of .EXE files. When a program infected with the Trieda virus is executed, this virus will infect up to three .EXE files located in the current directory, however it does not infect past the fourth .EXE file located in the current directory. Once it starts to infect the fourth .EXE file in the directory, it will reinfect this file over and over again. Programs infected with this virus will have a file length increase of 851 bytes for each copy of the virus present on the file. The virus will be located at the end of the file. The program's date and time in the DOS disk directory listing will not be altered. The following text strings are visible within the viral code: "Trieda 4.Cv tento den roku 1994 zapasila s maturitami a vyhrala !!!" "ath\" "*.exe" "????????EXE"