391 Virus

 Virus Name:  391 
 V Status:    Rare 
 Discovery:   July, 1994 
 Symptoms:    .COM file growth 
 Origin:      Unknown 
 Eff Length:  391 Bytes 
 Type Code:   PNCK - Parasitic Non-Resident .COM Infector 
 Detection Method:  AVTK, IBMAV, ViruScan, Sweep, F-Prot, NAV, 
                    NAVDX, VAlert, PCScan, 
                    Sweep/N, AVTK/N, IBMAV/N, NShld, NProt, NAV/N, LProt 
 Removal Instructions:  Delete infected files 
 General Comments: 
       The 391 virus was received in July, 1994.  Its origin or point of 
       isolation is unknown.  This virus is a non-resident, direct action 
       infector of .COM files, including COMMAND.COM. 
       When a program infected with the 391 virus is executed, this virus 
       will infect one .COM file located in the current directory.  Infected 
       programs will have a file length increase of 391 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 visible within the viral code: 

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