Squawk Virus

 Virus Name:  Squawk 
 V Status:    Rare 
 Discovered:  March, 1992 
 Symptoms:    .COM & .EXE growth; decrease in total system and available 
              free memory 
 Origin:      Unknown 
 Eff Length:  852 Bytes 
 Type Code:   PRtAK - Parasitic Resident .COM & .EXE Infector 
 Detection Method:  Sweep, AVTK, F-Prot, ViruScan, PCScan, 
                    IBMAV, NAV, NAVDX, VAlert, ChAV, 
                    NShld, LProt, Sweep/N, Innoc, NProt, AVTK/N, 
                    NAV/N, IBMAV/N 
 Removal Instructions:  Delete infected files 
 General Comments: 
       The Squawk virus was submitted in March, 1992.  Its origin is 
       unknown.  Squawk is a memory resident infector of .COM and .EXE 
       programs, including COMMAND.COM. 
       When the first Squawk infected program is executed, the Squawk 
       virus will install itself memory resident at the top of system 
       memory but below the 640K DOS boundary, moving interrupt 12's 
       return.  Total system and available free memory, as measured 
       by the DOS CHKDSK program, will have decreased by 4,096 bytes. 
       Interrupt 21 will be hooked by the virus in memory. 
       Once Squawk is memory resident, it will infect .COM and .EXE 
       programs, including COMMAND.COM, when they are executed.  Infected 
       programs will have a file length increase of 852 bytes with the 
       virus being located at the end of the infected file.  The program's 
       date and time in the DOS disk directory listing will not be altered. 
       One text string can be found in all programs infected with the 
       Squawk virus: 
               "Nguyen Van Cuong - Siagon IBM comppany." 
       It is unknown what Squawk does besides replicate. 

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