595 Virus


 Virus Name:  595 
 Aliases:    
 V Status:    Rare 
 Discovery:   September, 1992 
 Symptoms:    .COM file growth; file date/time changes 
 Origin:      Unknown 
 Eff Length:  595 Bytes 
 Type Code:   PNCK - Parasitic Non-Resident .COM Infector 
 Detection Method:  ViruScan, AVTK, F-Prot, Sweep, IBMAV, NAV, 
                    NAVDX, VAlert, PCScan, ChAV, 
                    NShld, AVTK/N, NProt, Sweep/N, IBMAV/N, Innoc, NAV/N 
 Removal Instructions:  Delete infected files 
 
 General Comments: 
       The 595 virus was received in September, 1992.  Its origin or 
       point of isolation is unknown.  The 595 virus is a non-resident 
       direct action infector of .COM programs, including COMMAND.COM. 
 
       When a program infected with the 595 virus is executed, the 595 
       virus will infect one .COM program located in the current 
       directory.  If all of the .COM files in the current directory are 
       already infected, the virus will search for a .COM program in the 
       C: drive root directory to infect.  Infected programs will have a 
       file length increase of 599 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 have been updated to the current system date 
       and time when infection occurred.  There is one text string visible 
       within the viral code in infected programs: 
 
               "????????COM" 
 
       It is unknown if 595 does anything besides replicate. 

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