7808 Virus

 Virus Name:  7808 
 V Status:    Rare 
 Discovery:   May, 1991 
 Origin:      Unknown 
 Symptoms:    .COM & .EXE growth; file date/time changes; 
              "Not enough memory" message 
 Eff Length:  7,808 Bytes 
 Type Code:   PNA - Parasitic Non-Resident .COM & .EXE Infector 
 Detection Method:  ViruScan, F-Prot, AVTK, NAV, Sweep, 
                    IBMAV, NAVDX, VAlert, PCScan, ChAV, 
                    NShld, Sweep/N, Innoc, AVTK/N, NAV/N, NProt, IBMAV/N, 
 Removal Instructions:  Delete infected files 
 General Comments: 
       The 7808 virus was received in May, 1991.  Its origin and point of 
       isolation is unknown.  7808 is a non-resident infector of .COM and 
       .EXE programs.  It does not infect COMMAND.COM. 
       When a program infected with 7808 is executed, the virus will 
       search the current drive and directory for a .COM or .EXE program 
       to infect.  It will infect the first uninfected .COM or .EXE program, 
       other than COMMAND.COM, which it finds in the directory.  Infected 
       programs will increase in length by 7,808 bytes.  The virus will be 
       located at the beginning of infected programs.  Infected programs 
       will also have their file date and time in the DOS disk directory 
       updated to the system date and time of infection. 
       The first program in the current directory, other than COMMAND.COM, 
       may also be reinfected by 7808.  When reinfection occurs, an 
       additional 7,808 bytes is added to the file. 
       Attempts to execute programs infected with 7808 may result in the 
       message "Not enough memory" being displayed, and the program the 
       user is attempting to execute terminating.  When this occurs, a 
       program in the current directory will not be infected.  Another 
       symptom of 7808 infection is that programs will take longer to 
       load when executed due to the virus searching the current disk 
       directory.  Execution of infected programs will also result in 
       their file date and time in the disk directory being updated. 

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