First query can find events included this string "registry_key_path" : """HKCR\mscfile\shell\open\command\(Default)""" GET _search { "query": { "query_string": { "query": "(registry_key_path:/.*mscfile.*/)" } } } If I change query to below don't find anything. [image]

Regex string from field value

Mark_Harwood (Mark Harwood) February 7, 2020, 1:53pm 5

See my comments re performance

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