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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. ===== Computer Virus Catalog 1.0: Scrambler Trojan (19-June-1990) ====
  11. Entry...............: Scrambler Trojan
  12. Alias(es)...........: KEYBGR Trojan
  13. Virus strain........: ---
  14. Virus detected when.: June 1990
  15.               where.: West Germany
  16. Host................: Keybgr.com
  17. Virus detected when.: November 1987
  18.               where.: Lehigh University (Bethlehem/USA)
  19. --------------------- Preconditions ----------------------------------
  20. Operating system(s).: MS-DOS
  21. Version/release.....: It is not bound to any particular DOS version,
  22.                          but keybgr is not used on standard DOS later
  23.                          than 3.3 Computer models PC's with standard
  24.                          keyboards.
  25. Computer model(s)...: All MS-DOS machines
  26. --------------------- Attributes -------------------------------------
  27. Easy identification.: The Trojan contains many copies of the string
  28.                          "nothing".
  29. Interrupts hooked...: INT 9 is captured for the host program, and
  30.                       INT 1C is used for the damage.
  31. Damage..............: A smiley face moves in a random fashion about
  32.                          the screen displacing characters as it moves.
  33.                          The face is either ascii 2 or 1 with a 50%
  34.                          probability.
  35. Damage trigger.......: About 60 minutes after the trojan keybgr is
  36.                        started.
  37. Particularities......: ---
  38. Similarities.........: ---
  39. --------------------- Agents -----------------------------------------
  40. Countermeasures.....: ---
  41. Detectors...........: ---
  42. Standard Means......: ---
  43. --------------------- Acknowledgement --------------------------------
  44. Location............: Virus Test Center, University Hamburg, FRG
  45. Classification by...: Morton Swimmer
  46. Documentation by....: Morton Swimmer
  47. Date................: June 30, 1990
  48. Information Source..: ---
  49.  
  50.  
  51. ===================== End of "Scrambler" Trojan ======================
  52.  
  53.   ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
  54.   ++++++++++++++++++++++++++ end of reports ++++++++++++++++++++++++
  55.   ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
  56.