1784 Virus

 Virus Name:  1784 
 V Status:    Rare 
 Discovery:   November, 1993 
 Symptoms :   .COM & .EXE growth; 
              decrease in total system & available free memory 
 Origin:      Unknown 
 Eff Length:  1,784 Bytes 
 Type Code:   PRhAK - Parasitic Resident .COM & .EXE Infector 
 Detection Method:  F-Prot, ViruScan, IBMAV, Sweep, AVTK, NAV, 
                    NAVDX, VAlert, PCScan, ChAV, 
                    NShld, Sweep/N, AVTK/N, NProt, Innoc, IBMAV/N, NAV/N, 
 Removal Instructions:  Delete infected files 
 General Comments: 
       The 1784 virus was received in November, 1993.  Its origin or point 
       of isolation is unknown.  This virus is a memory resident infector 
       of .COM and .EXE programs, including COMMAND.COM. 
       When the first 1784 infected program is executed, the 1784 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 2,304 bytes.  Interrupt 21 will be 
       hooked by the virus in memory.  Also at this time, the virus will 
       infect COMMAND.COM if it was not previously infected. 
       Once the 1784 virus is memory resident, it will infect .COM and .EXE 
       programs when they are executed or opened, but not when they are 
       copied.  Infected programs will have a file length increase of 1,784 
       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 not 
       be altered.  No text strings are visible within the viral code. 
       It is unknown what 1784 does besides replicate. 

Show viruses from discovered during that infect .

Main Page