A Subpattern defines the specific conditions or event patterns the rule is designed to detect, and the Detection Technology specifies the type of detection logic (e.g., real-time, historical). Both are essential for a rule to function in FortiSIEM.

When a performance rule triggers repeatedly, FortiSIEM updates the existing incident by incrementing the Incident Count and refreshing the Last Seen timestamp. This avoids flooding the incident table with duplicates while still tracking repeated occurrences.

The FortiSIEM agent can be used to send detailed endpoint data such as user activity and process behavior to FortiSIEM, which is essential for performing User and Entity Behavior Analytics (UEBA).

A subpattern in FortiSIEM is defined using Filters to match specific events, Aggregate conditions to apply statistical thresholds (e.g., COUNT), and Group By attributes to segment data for evaluation. These three components collectively determine how the subpattern functions.

Grouping by User, Source IP, and Count means that each unique combination of those three attributes will be treated as a separate result. In the table, all six rows have distinct combinations of User, Source IP, and Count - so FortiSIEM will display 6 results.