Marian Virus

 Virus Name:  Marian 
 Aliases:     Marian.700 
 V Status:    New 
 Discovered:  January, 1996 
 Symptoms:    .COM & .EXE growth; file date/time changes; 
              decrease in available free memory 
 Origin:      Unknown 
 Eff Length:  700 Bytes 
 Type Code:   PRhAK - Parasitic Resident .COM & .EXE Infector 
 Detection Method: NAV, NAVDX, IBMAV, ViruScan, IBMAV, VAlert, AVTK, 
                   F-Prot, ChAV, PCScan, 
                   NAV/N, NShld, IBMAV/N, AVTK/N, Innoc 
 Removal Instructions:  Delete infected files 
 General Comments: 
       The Marian or Marian.700 virus was received in January, 1996.  Its 
       origin or point of isolation is unknown, though it may be from 
       Eastern Europe.  Marian is a memory resident fast infector of .COM 
       and .EXE files, including COMMAND.COM. 
       When the first Marian infected program is executed, this virus will 
       install itself memory resident at the top of system memory but below 
       the 640K DOS boundary, not moving interrupt 12's return.  Available 
       free memory, as indicated by the DOS CHKDSK program from DOS 5.0, 
       will have decreased by 992 bytes.  Interrupt 21 will be hooked by the 
       virus in memory. 
       Once the Marian virus is memory resident, it will infect .COM and 
       .EXE files, including COMMAND.COM, when they are executed or opened, 
       but not on copy.  Infected files will have a file length increase of 
       700 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 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 infected files: 
           "BULPACK BBS - PLOVDIV" 
           "Copyright (c) Marian Delkinov" 
           "PEDY PATENT." 

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