Virus.DOS.Chek1.282 or Chek1 is a virus that runs on MS-DOS Operating System.
Chek1 is a harmless memory resident parasitic virus. It copies itself into Interrupt Vectors Table, hooks INT 21h and writes itself to the end of .COM-files that are accessed with FindNext ASCII (AH=4Fh) DOS function.
The virus contains the internal text string :
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