Darkray Virus

 Virus Name:  Darkray 
 V Status:    New 
 Discovery:   October, 1993 
 Symptoms:    .EXE file growth; 
              decrease in total system & available memory 
 Origin:      The Netherlands 
 Eff Length:  1,525 Bytes 
 Type Code:   PRhE - Parasitic Resident .EXE Infector 
 Detection Method:  ViruScan, AVTK, F-Prot, IBMAV, Sweep, 
                    NAV, NAVDX, VAlert, PCScan, ChAV, 
                    NShld, AVTK/N, NProt, Sweep/N, IBMAV/N, NAV/N, LProt, 
                    Innoc 4.0+ 
 Removal Instructions:  Delete infected files 
 General Comments: 
       The Darkray virus was submitted in October, 1993, and is originally 
       from The Netherlands.  It is a memory resident infector of .EXE 
       programs written by the Trident virus writing group. 
       When the first Darkray infected program is executed, the Darkray 
       virus will install itself memory resident at the top of system 
       memory but below the 640K DOS boundary, not moving interrupt 12's 
       return.  Total system and available free memory, as indicated by the 
       DOS CHKDSK program, will have decreased by 1,888 bytes.  Interrupts 
       13 and 21 will be hooked by the virus in memory. 
       Once the Darkray virus is memory resident, it will infect .EXE 
       programs when they are executed.  Infected programs will have a file 
       length increase of 1,525 bytes with the virus being located at the 
       end of the file.  The file'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 Darkray infected programs: 
       It is unknown what Darkray does besides replicate. 
       See:   Flue   Trident 

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