Dicker Virus

 Virus Name:  Dicker 
 Aliases:     Dicker.400 
 V Status:    New 
 Discovered:  January, 1995 
 Symptoms:    .COM file growth; system hangs; TSRseconds = "62"; 
 Origin:      Unknown 
 Eff Length:  400 Bytes 
 Type Code:   PRsCK - Parasitic Resident .COM Infector 
 Detection Method:  F-Prot, AVTK, IBMAV, Sweep, NAV, ViruScan, 
                    NAVDX, VAlert, PCScan, ChAV, 
                    AVTK/N, IBMAV/N, Sweep/N, NAV/N, NShld, LProt, Innoc 4.0+ 
 Removal Instructions:  Delete infected files 
 General Comments: 
       The Dicker virus was received in January, 1995.  Its origin or point 
       of isolation is unknown.  Dicker is a memory resident infector of 
       .COM files including COMMAND.COM.  Frequent system hangs occur when 
       .COM files are executed. 
       When the first Dicker infected program is executed, this virus will 
       install itself memory resident as a low system memory TSR of 
       approximately 64 kilobytes.  Interrupt 21 will be hooked by the 
       virus in memory. 
       Once the Dicker virus is memory resident, it will infect .COM 
       files, including COMMAND.COM, when they are executed.  Infected 
       .COM files will have a file length increase of 400 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 not be 
       altered.  The following text strings are visible within the viral 
       code in all Dicker infected programs: 
               "Dicker 1.0" 

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