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  1.  
  2.              *********************************************
  3.              ***   Reports collected and collated by   ***
  4.              ***            PC-Virus Index             ***
  5.              ***      with full acknowledgements       ***
  6.              ***            to the authors             ***
  7.              *********************************************
  8.  
  9.  
  10.  
  11. == Computer Virus Catalog 1.2: "Ambulance Car" Virus (20-July-1990) ==
  12. Entry................. "Ambulance Car" Virus
  13. Alias(e).............. REDX-Virus
  14. Strain................ ---
  15. Detected: when........ West-Germany
  16.           where....... June 1990
  17. Classification........ Program virus, direct action COM infector
  18. Length of virus....... 796 bytes added to COM files
  19. -------------------- Preconditions ---------------------------------
  20.  
  21. Operating System(s)... MS-DOS
  22. Version/Release....... 2.0 and up
  23. Computer models....... Any IBM-compatibles
  24. ---------------------Attributes -----------------------------------
  25. Easy identification... ---
  26. Type of infection..... Direct action COM infection. The virus tries to
  27.                           find two victims which it randomly selects
  28.                           in the current directory or via the PATH
  29.                           variable in the environment. Thus by in-
  30.                           voking an infected file, either none, one or
  31.                           two files can be infected.
  32. Infection trigger..... Loading of an infected file.
  33. Interrupts hooked..... ---
  34. Damage................ If the lowest 3 bits of the generation counter
  35.                           (incremented upon each infection attempt)
  36.                           contain 110b (110 is the German police phone
  37.                           number), an ambulance car is running from
  38.                           left to right across the bottom of the
  39.                           screen and the typical siren sound is played
  40.                           by the speaker. The car is made up of block
  41.                           graphic characters and has a flashing light
  42.                           on top. A flag is set, and the police car
  43.                           will not run until the next bootup.
  44. Particularities....... The inhibit flag for the car collides with the
  45.                           LPT3: base address. (This will usually not
  46.                           be not installed.)
  47.  
  48. ----------------------- Acknowledgement ------------------------------
  49. Location.............. Micro-BIT Virus Center RZ Universitaet
  50.                           Karlsruhe
  51.  
  52. Classification by..... Christoph Fischer
  53. Dokumentation by ..... Christoph Fischer
  54. Date.................. 24-June-1990
  55.  
  56. ====================== End of "Ambulance Car" Virus ==================
  57.  
  58.   ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
  59.   ++++++++++++++++++++++++++ end of reports ++++++++++++++++++++++++
  60.   ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
  61.