Magdzie Virus

 Virus Name:  Magdzie 
 Aliases:     Magdzie.1056 
 V Status:    New 
 Discovered:  July, 1995 
 Symptoms:    .EXE file growth; file date/time changes; 
              decrease in available free memory 
 Origin:      Unknown 
 Eff Length:  1,056 - 1,072 Bytes 
 Type Code:   PRhE - Parasitic Resident .EXE Infector 
 Detection Method:  F-Prot, AVTK, VAlert, Sweep, NAV, NAVDX, IBMAV, 
                    ViruScan, ChAV, 
                    Sweep/N, NAV/N, IBMAV/N, NShld, AVTK/N, NProt, Innoc 4.0+ 
 Removal Instructions:  Delete infected files 
 General Comments: 
       The Magdzie or Magdzie.1056 virus was received in July, 1995.  Its 
       origin or point of isolation is unknown.  Magdzie is a memory 
       resident stealth virus which infects .EXE files. 
       When the first Magdzie 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. 
       Total available free memory, as indicated by the DOS CHKDSK 
       program from DOS 5.0, will have decreased by 1,104 bytes.  No 
       interrupts will be mapped to the virus in memory. 
       Once the Magdzie virus is memory resident, it will infect .EXE 
       files when they are executed or opened.  Infected files will have a 
       file length increase of 1,056 to 1,072 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 programs: 
           "Magdzie T. - jutro Twoje urodziny!" 
       This virus disinfects infected programs as they are read into 
       memory when the virus is memory resident.  As a result, anti-viral 
       programs may "see" the disinfected copy of the program if the virus 
       is memory resident. 

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