UnExe Virus

 Virus Name:  UnExe   
 V Status:    New 
 Discovered:  January, 1993 
 Symptoms:    .COM file growth; file date/time changes; .EXE files deleted 
 Origin:      Unknown 
 Eff Length:  425 Bytes 
 Type Code:   PNCK - Parasitic Non-Resident .COM Infector 
 Detection Method:  ViruScan, F-Prot, AVTK, Sweep, NAV, IBMAV, 
                    NAVDX, VAlert, ChAV, 
                    NShld, NProt, Sweep/N, NAV/N, AVTK/N, IBMAV/N, Innoc 
 Removal Instructions:  Delete infected Files 
 General Comments: 
       The UnExe virus was submitted in January, 1993.  UnExe is a non- 
       resident, direct action infector of .COM programs, including 
       COMMAND.COM.  It also deletes .EXE programs. 
       When a program infected with the UnExe virus is executed, the 
       UnExe virus will infect one .COM program located in the current 
       directory.  If COMMAND.COM is located in this directory, it may 
       become infected.  Infected programs will have a file length increase 
       of 425 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 
       have been updated to the current system date and time when infection 
       occurred.  The following text strings are visible within the UnExe 
       viral code in all UnExe infected programs: 
               "*.COM *.EXE" 
               "1 /M" 
       The UnExe virus will delete one .EXE program located in the current 
       directory each time an infected program is executed. 

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