How to filter out event from outbound mail log having "Attachment" field contains file extension ".txt,.html,.jpg,.png"?

[Abhineet]

Looking for Splunk query to filter out event if "Attachment" field having extension .txt or .html or .jpg or .png

if only above mentioned file extension available in "Attachment" field then only it should filter out. apart from that if any other file extension available with above mentioned then wee need to consider that event.

Below mentioned is attachment field values in some of event.

red enclosed event should be filtered out as "Attachment" field have only ".txt",".html" and ".png".

other two event have ".txt",".html",".docx" and ".txt",".ics" these two should not filterout.

[richgalloway]

Here's one approach.  It uses the mvfind function to see if each attachment type is present.  It then filters out the events with all three types.

...
| eval has_txt=mvfind(Attachment, "\.txt"), has_html=mvfind(Attachment, "\.html"), has_png=mvfind(Attachment, "\.png")
| where NOT (has_txt AND has_html AND has_png)

[Abhineet]

This helps.. thanks

[richgalloway]

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