DOSHunter Virus

 Virus Name:  DOSHunter 
 Aliases:     B3 
 V Status:    Common 
 Discovered:  November, 1992 
 Symptoms:    .COM file growth; decrease in total system & available free 
              memory; system hard disk corruption 
 Origin:      The Netherlands 
 Eff Length:  483 Bytes 
 Type Code:   PRhCK - Parasitic Resident .COM Infector 
 Detection Method:  ViruScan, AVTK, Sweep, F-Prot, IBMAV, 
                    NAV, NAVDX, VAlert, PCScan, ChAV, 
                    NShld, Sweep/N, Innoc, NProt, AVTK/N, LProt, IBMAV/N, 
 Removal Instructions:  Delete infected files 
 General Comments: 
       The DOSHunter virus was submitted in November, 1992.  It was 
       isolated in The Netherlands.  DOSHunter is a memory resident 
       infector of .COM programs, including COMMAND.COM. 
       When the first program infected with the DOSHunter virus is 
       executed, this 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 1,408 bytes.  Interrupt 21 will be hooked by the 
       Once the DOSHunter 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 483 bytes with the 
       virus being located at the beginning of the file.  The program's 
       date and time in the DOS disk directory listing will not be 
       altered.  No text strings are visible within the viral code. 
       The DOSHunter virus activates on June 26th of any year, at which 
       time it will trash the first 128 sectors of the system hard disk. 

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