Wave Virus

 Virus Name:  Wave 
 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, 
 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. 

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