Virus Name: Magdzie
V Status: New
Discovered: July, 1995
Symptoms: .EXE file growth; file date/time changes;
decrease in available free memory
Eff Length: 1,056 - 1,072 Bytes
Type Code: PRhE - Parasitic Resident .EXE Infector
Detection Method: F-Prot, AVTK, VAlert, Sweep, NAV, NAVDX, IBMAV,
Sweep/N, NAV/N, IBMAV/N, NShld, AVTK/N, NProt, Innoc 4.0+
Removal Instructions: Delete infected files
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.