Baselining section is meant to assign all unassigned events to
cases, so that newly incoming events are immediately assigns to existing
cases and only differences to the last scan have to be reviewed. (new
malware, new signatures)
12.1.1. Auto Baselining
The Auto Baselining feature can be used to assign events to new and automatically generated cases. Auto Casing makes use of the so-called Auto Case ID, which is the same for all events of a certain type (see Glossary > Cases > Auto Case ID for details).
Auto Baselining is typically used to quickly reduce the remaining events in the Baselining section. It reduced the burden to manually group together events of a similar type.
Automatically cased events can then be reviewed in the
Auto Baselining uses a threshold that defines the minimum number of events required in each of these automatically generated cases. A threshold of 10 instructs the process to create only cases for groups of at least 10 similar events. Obviously, we do not recommend using threshold of 1, but everything higher than 1 can be reasonable.
The best practice is to start the Auto Baselining process with a relatively high threshold (e.g., 10) and then subsequently perform iterations with lower thresholds.
The Optimization is used to assign unassigned events to cases based on their filters.
Usually, an analyst selects events and creates a case with these events. During the case creation a set of filters gets generated to automatically assign newly incoming events to this case.
Often, characteristics of existing older events also align with the criteria described in the filters of the new case. However, they do not get assigned to that case, because they're already in the database and the case assignment only happens when new events arrive.
Optimization is used to assign unassigned events to existing cases.