ZZ Virus

 Virus Name:  ZZ 
 V Status:    Rare 
 Discovered:  May, 1992 
 Symptoms:    .COM file growth; file date/time changes; message 
 Origin:      Unknown 
 Eff Length:  429 Bytes 
 Type Code:   PNCK - Parasitic Non-Resident .COM Infector 
 Detection Method:  ViruScan, F-Prot, Sweep, IBMAV, AVTK, 
                    NAV, NAVDX, VAlert, PCScan, ChAV, 
                    NShld, Sweep/N, Innoc, NProt, AVTK/N, NAV/N, IBMAV/N, 
 Removal Instructions:  Delete infected files 
 General Comments: 
       The ZZ virus was submitted in April, 1992.  Its origin or point of 
       isolation is unknown.  ZZ is a non-resident, direct action infector 
       of .COM programs, including COMMAND.COM. 
       When a program infected with ZZ is executed, the ZZ virus will 
       infect all of the .COM programs located in the current directory. 
       If COMMAND.COM is located in this directory, it will become 
       Programs infected with the ZZ virus will have a file length increase 
       of 429 bytes.  The virus will be located at the beginning of the 
       infected 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.  There are no text strings 
       visible within the viral code. 
       It is doesn't appear to contain any destructive code, though it 
       will occassionally display the following message when an infected 
       program is executed: 
               "ZZ Top the best !!!" 

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