Korean Virus

Virus Name: Korean Aliases: V Status: New Discovered: July, 1995 Symptoms: COMMAND.COM & .EXE file growth; system display blanked; decrease in available free memory Origin: Korea Eff Length: 709 - 837 Bytes Type Code: PRhEK - Parasitic Resident COMMAND.COM & .EXE Infector Detection Method: AVTK, Sweep, NAV, NAVDX, IBMAV, ViruScan, F-Prot, PCScan, ChAV, AVTK/N, NAV/N, Sweep/N, IBMAV/N, NShld, Innoc 4.0+ Removal Instructions: Delete infected files General Comments: The Korean virus was received in July, 1995. It appears to be from Korea. This virus is a memory resident infector of COMMAND.COM and .EXE files. When the first Korean infected program is executed, this virus will install itself memory resident at the top of system memory but below the 640K DOS boundary, not moving interrupt 12's return. Available free memory, as indicated by the DOS CHKDSK program from DOS 5.0 will have decreased by 2,032 bytes. Interrupt 21 will be hooked by the virus in memory. Once the Korean virus is memory resident, it will infect COMMAND.COM and .EXE files larger than approximately 25K when they are opened or executed. Infected files will have a file length increase of 709 to 837 bytes with the virus being 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: "I am a Stranger in KOREA ..." "C:\COMMAND.COM" When the virus is memory resident, the screen may be blanked by the virus when a program is executed.