Kit Virus

 Virus Name:  Kit 
 V Status:    Rare 
 Discovered:  April, 1992 
 Symptoms:    .COM & .EXE growth; decrease in total system and available 
              free memory 
 Origin:      Unknown 
 Eff Length:  2,383 - 2,446 Bytes 
 Type Code:   PRhAK - Parasitic Resident .COM & .EXE Infector 
 Detection Method:  ViruScan, F-Prot, AVTK, Sweep, IBMAV, 
                    NAV, NAVDX, VAlert, PCScan, ChAV, 
                    NShld, LProt, Sweep/N, Innoc, NProt, AVTK/N, 
                    NAV/N, IBMAV/N 
 Removal Instructions:  Delete infected files 
 General Comments: 
       The Kit virus was received in April, 1992.  Its origin is unknown. 
       It is a memory resident infector of .COM and .EXE programs, 
       including COMMAND.COM. 
       The first time a Kit infected program is executed, the Kit virus 
       will install itself memory resident at the top of system memory 
       but below the 640K DOS boundary.  Total system and available free 
       memory, as indicated by the DOS CHKDSK program, will have 
       decreased by 2,400 bytes.  Interrupts 1C and 21 will be hooked. 
       Once the Kit virus is memory resident, it will infect .COM and 
       .EXE programs when they are executed.  If COMMAND.COM is executed, 
       it will also become infected. 
       .COM programs infected with the Kit virus will have a file length 
       increase of 2,383 to 2,384 bytes on initial infection.  Kit will 
       reinfect .COM files, adding an additional 2,384 bytes with each 
       reinfection.  The virus will be located at the beginning of the 
       infected file. 
       .EXE programs infected with the Kit virus will have a file length 
       increase of 2,416 to 2,446 bytes with the initial infection.  As 
       with .COM files, Kit reinfects .EXE programs adding 2,416 bytes 
       with each reinfection.  Kit will be located at the end of the 
       It does not alter the file's date and time in the DOS disk directory 
       listing.  There are no text strings visible within the viral code 
       in infected programs. 
       It is unknown what Kit may do besides replicate. 

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