Null Set Virus

 Virus Name:  Null Set 
 Aliases:     Null 
 V Status:    Rare 
 Discovered:  February, 1992 
 Symptoms:    .COM file growth 
 Origin:      United States 
 Eff Length:  733 Bytes 
 Type Code:   PNCK - Parasitic Non-Resident .COM Infector 
 Detection Method:  ViruScan, F-Prot, Sweep, IBMAV, ChAV, 
                    AVTK, NAV, NAVDX, VAlert, PCScan, 
                    NShld, Sweep/N, LProt, Innoc, NProt, AVTK/N, IBMAV/N, 
 Removal Instructions:  Delete infected files 
 General Comments: 
       The Null Set virus was submitted in February, 1992.  It is from the 
       United States.  Null Set is a non-resident direct action infector of 
       .COM programs, including COMMAND.COM. 
       When a program infected with the Null Set virus is executed, the 
       virus will search the current directory to locate the first 
       previously uninfected .COM program over approximately 700 bytes in 
       size.  If an uninfected .COM program is located, the virus will 
       infected it. 
       Programs infected with the Null Set virus will have a file length 
       increase of 733 bytes.  The virus will be located at the end of the 
       program.  The file's date and time in the DOS disk directory 
       listing will not be altered. 
       Null Set doesn't appear to do anything besides replicate. 
       See:   Doomsday 

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