Explode Virus

 Virus Name:  Explode 
 V Status:    Viron 
 Discovered:  May, 1992 
 Symptoms:    .COM files overwritten; program corruption; file date/time 
              change; message & overwriting of hard disk cylinder 0; 
              boot failure 
 Origin:      Unknown 
 Eff Length:  229 Bytes 
 Type Code:   ONCK - Overwriting Non-Resident .COM Infector 
 Detection Method:  ViruScan, NAV, AVTK, F-Prot, Sweep, IBMAV, 
                    NAVDX, VAlert, PCScan, ChAV, 
                    Sweep/N, NShld, Innoc, NProt, AVTK/N, LProt, IBMAV/N, 
 Removal Instructions:  Delete infected files 
 General Comments: 
       The Explode virus was received in May, 1992.  Its origin is 
       unknown.  Explode is a non-resident, overwriting virus which is 
       very destructive when it activates. 
       When a program infected with the Explode virus is executed, this 
       virus will overwrite the first 229 bytes of all .COM files located 
       in the current drive's current directory.  It will also access the 
       C: drive, overwriting cylinder 0 with binary zeros.  Once this 
       process has completed, the following message is displayed and the 
       system will be hung: 
               "Your hard drive is about to explode!" 
       Attempts to then boot from the system hard disk or an infected 
       diskette will fail.  If the system is booted from an uninfected 
       system diskette, the boot will be successful, but the hard disk 
       will be unaccessible. 
       Programs infected with the Explode virus will have the first 229 
       bytes of the host program overwritten with the Explode viral code. 
       The file's date and time in the DOS disk directory will have been 
       updated to the current system date and time when infection 
       occurred.  The following text strings are visible within infected 
               "*.COM Your hard drive is about to explode!" 
               "Program too big to fit in memory." 
               "UABBS -/\-] Ajax [-/\-" 

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