Wave Virus

Virus Name: Wave Aliases: V Status: Rare Discovered: March, 1993 Symptoms: .COM file growth; .COM files created Origin: Unknown Eff Length: 454 Bytes Type Code: PRaCK - Parasitic Resident .COM Infector Detection Method: Sweep, AVTK, F-Prot, ViruScan, IBMAV, NAVDX, NAV, VAlert, PCScan, ChAV, Sweep/N, NShld, AVTK/N, IBMAV/N, NProt, NAV/N, Innoc, LProt Removal Instructions: Delete infected files General Comments: The Wave virus was submitted in March, 1993. Its origin or point of isolation is unknown. Wave is a memory resident infector of .COM programs, including COMMAND.COM. It does not infect .COM programs located on the A: drive. When the first Wave infected program is executed, the Wave virus will install itself memory resident in available system memory, hooking interrupt 21. Total system and available free memory, as indicated by the DOS CHKDSK program, will not be altered. Once the Wave virus is memory resident, it will infect .COM programs, including COMMAND.COM, when they are executed. Infected programs will have a file length increase of 454 bytes with the virus being located at the end of the file. The file's date and time in the DOS disk directory listing will not be altered. No text strings are visible within the viral code. The Wave virus will create a companion .COM program for each .EXE program the user executes. These companion files contain a copy of the .EXE program, and are not infected. They appear to simply take up disk space.