What field are used to populate the entire SIEM APP

Hii Everyone,
I am trying to map the fields used in my index to the ECS fields so that it gets populated in the SIEM APP. I have mapped fields like username , hostname and event action with the ECS fields and its getting populated in the SIEM App.

Basically I want all the fields used in the SIEM APP , So that I can map and populate my fields in SIEM APP.

Hi! Your best bet there is to populate as many of the ECS fields as possible.

Note that you can also use the inspect button in the SIEM app to figure out more data sources that you could start monitoring.

Thanks @webmat