Newcom Virus

 Virus Name:  Newcom 
 V Status:    Rare 
 Discovered:  July, 1991 
 Symptoms:    .COM & .EXE growth; decrease in total system and available 
              free memory 
 Origin:      Unknown 
 Eff Length:  3,045 - 3,060 Bytes 
 Type Code:   PRhAK - Parasitic Resident .COM & .EXE Infector 
 Detection Method:  ViruScan, AVTK, F-Prot, Sweep, ChAV, 
                    IBMAV, NAV, NAVDX, VAlert, PCScan, 
                    NShld, Sweep/N, LProt, Innoc, NProt, IBMAV/N, 
                    AVTK/N, NAV/N 
 Removal Instructions:  Delete infected files 
 General Comments: 
       The Newcom virus was isolated in July, 1991.  Its origin is 
       unknown.  Newcom is a memory resident infector of .COM and .EXE 
       files, including COMMAND.COM. 
       When the first program infected with Newcom is executed, the 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 measured by the DOS CHKDSK program, will decrease by 
       3,312 bytes.  Interrupts 1C and 21 are hooked by the virus. 
       Interrupt 12's return is not moved. 
       After becoming memory resident, Newcom will infect .COM and .EXE 
       programs when they are executed.  If COMMAND.COM is executed, it 
       will become infected.  Infected programs increase in size by 3,045 
       to 3,060 bytes with the virus being located at the end of the 
       infected file.  The file's date and time in the DOS disk directory 
       will not be altered by the virus. 
       It is unknown what Newcom does besides replicate. 
       See:   Alfa 

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