4Res Virus

 Virus Name:  4Res 
 V Status:    Rare 
 Discovery:   November, 1993 
 Symptoms:    .COM & .EXE growth; system boot failure; system hangs 
 Origin:      Unknown 
 Eff Length:  1,049 Bytes 
 Type Code:   PNAK - Parasitic Non-Resident .COM Infector 
 Detection Method:  AVTK, IBMAV, ViruScan, F-Prot, NAV, Sweep, 
                    NAVDX, VAlert, PCScan, ChAV, 
                    NProt, AVTK/N, NShld, Sweep/N, NAV/N, IBMAV/N, Innoc 
 Removal Instructions:  Delete infected files 
 General Comments: 
       The 4Res virus was received in November, 1993.  Its origin or point 
       of isolation is unknown.  4Res is a non-resident, direct action 
       infector of .COM and .EXE programs, including COMMAND.COM. 
       When a program infected with the 4Res virus is executed, this virus 
       will infect one .COM or .EXE program located in the current 
       directory.  Programs infected with the 4Res virus will have a file 
       length increase of 1,049 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 string 
       can be found within the viral code in all infected programs: 
               "4RESPATH=COMSPEC=*.COM *.EXE 4RES" 
       System hangs frequently occur when infected .COM programs are 
       executed.  Additionally, once the boot copy of COMMAND.COM becomes 
       infected, the system will fail to boot from the infected drive. 

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