NR-481 Virus


 Virus Name:  NR-481 
 Aliases:    
 V Status:    Rare 
 Discovered:  March, 1993 
 Symptoms:    .COM & .EXE growth 
 Origin:      North America 
 Eff Length:  481 Bytes 
 Type Code:   PNA - Parasitic Non-Resident .COM & .EXE Infector 
 Detection Method:  ViruScan, F-Prot, Sweep, NAV, IBMAV, AVTK, 
                    NAVDX, VAlert, PCScan, 
                    NShld, Sweep/N, NAV/N, NProt, IBMAV/N, AVTK/N 
 Removal Instructions:  Delete infected files 
 
 General Comments: 
       The NR-481 virus was submitted in March, 1993.  It is from North 
       America (Canada or the United States).  NR-481 is a non-resident, 
       direct action infector of .COM and .EXE programs, but not 
       COMMAND.COM. 
 
       When a program infected with the NR-481 virus is executed, the 
       NR-481 virus will infect all the .COM and .EXE programs located in 
       the current directory.  Infected programs will have a file length 
       increase of 481 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.  One text string is visible within the 
       viral code in all NR-481 infected programs: 
 
               "*.EXE *.COM .." 
 
       NR-481 doesn't appear to do anything besides replicate.

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