Destructor V4.00 Virus

 Virus Name:  Destructor V4.00 
 Aliases:     Destructor 
 V Status:    Rare 
 Discovered:  December, 1990 
 Symptoms:    .COM & .EXE growth; decrease in system and available free 
 Origin:      Bulgaria 
 Eff Length:  1,150 - 1162 Bytes 
 Type Code:   PRtAK - Parasitic Resident .COM & .EXE Infector 
 Detection Method:  ViruScan, AVTK, F-Prot, NAV, Sweep, 
                    IBMAV, NAVDX, VAlert, PCScan, ChAV, 
                    NShld, LProt, Sweep/N, Innoc, NProt, AVTK/N, 
                    NAV/N, IBMAV/N 
 Removal Instructions:  Delete infected files 
 General Comments: 
       The Destructor V4.00 virus was received in December, 1990.  This 
       virus is from Bulgaria, and is a memory resident infector of .COM 
       and .EXE files, including COMMAND.COM. 
       When the first program infected with the Destructor V4.00 virus is 
       executed, the virus will install itself memory resident at the top 
       of system memory but below the 640K DOS boundary.  Interrupt 12's 
       return is moved.  Total system memory and available free memory will 
       be 1,216 bytes less than what is expected on the infected system. 
       At this time, the virus will also infect COMMAND.COM if it is not 
       already infected. 
       Once Destructor V4.00 is memory resident, it will infect programs as 
       they are opened or executed. Infected .COM programs will have 
       increased in size by 1,150 bytes.  .EXE programs will have increased 
       in size by 1,154 to 1,162 bytes. In both cases, the virus will be 
       located at the end of the infected file.  This virus does not alter 
       the file's date/time in the disk directory, and it also makes no 
       attempt to hide the file length increase on infected programs. 
       The following text string can be found in files infected with this 
               "DESTRUCTOR  V4.00  (c) 1990 by ATA 
       It is unknown what Destructor V4.00 does, if anything, besides 

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