Shock Therapy Virus

 Virus Name:  Shock Therapy 
 V Status:    Rare 
 Discovered:  April, 1993 
 Symptoms:    .COM & .EXE growth; 
              decrease in total system & available free memory 
 Origin:      Unknown 
 Eff Length:  620 Bytes 
 Type Code:   PRtAK - Parasitic Resident .COM & .EXE Infector 
 Detection Method:  AVTK, F-Prot, ViruScan, Sweep, IBMAV, 
                    NAV, NAVDX, VAlert, PCScan, 
                    NShld, Sweep/N, NProt, AVTK/N, NAV/N, IBMAV/N, LProt 
 Removal Instructions:  Delete infected files 
 General Comments: 
       The Shock Therapy virus was submitted in April, 1993.  Its origin 
       or point of isolation is unknown.  Shock Therapy is a memory resident 
       infector of .COM and .EXE programs, including COMMAND.COM. 
       When the first Shock Therapy infected program is executed, the 
       Shock Therapy 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 indicated 
       by the DOS CHKDSK program, will have decreased by 2,048 bytes. 
       Interrupt 21 will be hooked by Shock Therapy in memory. 
       Once the Shock Therapy virus 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 620 bytes with 
       the virus being located at the end of the file.  The program's date 
       and time in the DOS disk directory listing will not be altered.  The 
       following text strings are encrypted within the Shock Therapy virus, 
       thus not visible within infected files: 
               "Your HD is TOAST!Thanx to Shock Therapy!" 
               "SHOCK THERAPY" 
       It is unknown what Shock Therapy does besides replicate. 
       See:   PS-MPC 

Show viruses from discovered during that infect .

Main Page