Trying to extract part of file path

Graylog Central (peer support)
1

Hi, I’m trying to extract part of a file path from a log message into its own field.

E:\Network_PSTranscript\20221212\PowerShell_transcript.HOST-NAME.9oeXqxIz.20221212144458.txt

Example message above, I want to extract just the “HOST-NAME” rules I’ve tried I end up with just the part after the - not the entire string.

2

Hello && Welcome @David_W

Can you give us some more information on what you did and/or your environment?

3

Hi, I managed to actually get it working after playing with it some more. Next question can I actually use the extracted data to overwrite the source field instead of creating a new field for it?

4

Hey,

The source field will be there by defualt. I think you can maniply the dta in the source field with a pipeline. If not then yes you will need to create a new field. I think i have a pipeline for that somewhere, when i find it ill post it here.

EDIT: I do belive youll need to make a new field, the source field maybe hard coded.
here is an example.

rule "Attach NodID to Messages"

when
    has_field("gl2_source_node") AND contains(to_string($message.gl2_source_node), "0e68c48b-29cc-4085-a2ca-bc700fcf82da")
then
    set_field("node_name","graylog.domain.com");
end

Perhaps post what you have then what want and other here could help you.