Dy Virus

 Virus Name:  Dy 
 V Status:    Rare 
 Discovered:  September, 1993 
 Symptoms:    .COM file growth; file date/time changes 
 Origin:      Unknown 
 Eff Length:  278 Bytes 
 Type Code:   PNCK - Parasitic Non-Resident .COM Infector 
 Detection Method:  F-Prot, IBMAV, ViruScan, AVTK, PCScan, 
                    Sweep, NAV, NAVDX, VAlert, ChAV, 
                    NProt, NShld, Sweep/N, AVTK/N, IBMAV/N, Innoc, NAV/N, 
 Removal Instructions:  Delete infected files 
 General Comments: 
       The Dy virus was submitted in September, 1993.  Its origin or point of 
       isolation is unknown.  Dy is a non-resident, direct action infector 
       of .COM programs, including COMMAND.COM. 
       When a program infected with the Dy virus is executed, this virus will 
       infect all of the .COM programs located in the current directory.  If 
       COMMAND.COM is in this directory, it will become infected.  Programs 
       infected with the Dy virus will have a file length increase of 278 
       bytes with the virus being located at the beginning 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 viral 
       code in all Dy infected programs: 
       The "DY" text string occurs starting in the third byte of all 
       infected files. 

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