Advanced Analytical Rules Engine: FortiSIEM's rules engine allows for complex event correlation
using multiple subpatterns.
Operations for Referencing Subpatterns:
FOLLOWED_BY: This operation is used to indicate that one event follows another within a specified
time window.
OR: This logical operation allows for the inclusion of multiple subpatterns, where the rule triggers if
any of the subpatterns match.
AND: This logical operation requires all referenced subpatterns to match for the rule to trigger.
Usage: These operations allow for detailed and precise event correlation, helping to detect complex
patterns and incidents.
Reference: FortiSIEM 6.3 User Guide, Advanced Analytics Rules Engine section, which explains the
use of different operations to reference subpatterns in rules.
