Happy Virus

 Virus Name:  Happy 
 V Status:    Rare 
 Discovered:  July, 1992 
 Symptoms:    .COM file growth; file date/time change; message 
 Origin:      Unknown 
 Eff Length:  412 Bytes 
 Type Code:   PNCK - Parasitic Non-Resident .COM Infector 
 Detection Method:  AVTK, Sweep, ViruScan, F-Prot, IBMAV, NAV, 
                    NAVDX, VAlert, PCScan, ChAV, 
                    NShld, Sweep/N, Innoc, NProt, AVTK/N, NAV/N, IBMAV/N, 
 Removal Instructions:  Delete infected files 
 General Comments: 
       The Happy virus was submitted in July, 1992.  Its origin or point of 
       isolation is unknown.  Happy is a non-resident, direct action 
       infector of .COM programs, including COMMAND.COM. 
       When a program infected with the Happy virus is executed, the Happy 
       virus will infect one .COM file in the current directory, as well 
       as one .COM file in the C:\DOS directory.  The following message 
       will then be displayed: 
               "Thank you for running the Happy virus 
                Warning !!! COM-files in current directory 
                and C:\DOS might be infected !!!!" 
       Programs infected with the Happy virus will have a file length 
       increase of 412 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 message text indicated above can be 
       seen within the viral code in all Happy infected programs.  The 
       first byte of Happy infected programs will be a hex "FF" character, 
       which is the virus' infection marker. 

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