There is only one file type that uses the .KOR extension:
Windows Korean Noise-Words List File
System file used by part of the Windows operating system called Index Server, a component used for search indexing; contains a plain text list of noise words that should be excluded from the search index; enables Windows to index Korean search information more effectively, such as file and folder searches.
The Windows Korean noise-words list file noise.kor is located in the C:\Windows\System32\ directory. It is saved in a plain text format.
Updated: September 8, 2011