Virus.DOS.Maca.1000 or Maca is virus that runs on MS-DOS. This virus produces tune of "The Entertainer" after 15 minutes long.


Maca is a memory resident parasitic virus. It hooks INT 21h, and writes itself to the end of COM and EXE files that are executed. While installing a memory resident, the virus infects the C:\COMMAND.COM file. During even months (February, April, etc.) on the 4th, 8th, and 12th, the virus also hooks INT 1Ch and plays "The Entertainer" tune. The virus contains the following text strings :




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