Custom event keys
Vendors and partners can define their own custom event keys and include them in the payload of the LEEF format.
Use custom key value-pair attributes in an event payload when there is no default key to represent information about an event for your appliance. Create custom event attributes only when there is no acceptable mapping to a predefined event attribute. For example, if your appliance monitors access, you can require the file name that is accessed by a user where no file name attribute exists in LEEF by default.
Custom event keys are non-normalized, which means that any specialized key value pairs you include in your LEEF event are not displayed by default on the Log Activity tab of QRadar. To view custom attributes and non-normalized events on the Log Activity tab of QRadar, you must create a custom event property. Non-normalized event data is still part of your LEEF event, is searchable in QRadar, and is viewable in the event payload. For more information about creating a custom event property, see the IBM QRadar Administration Guide.