Step 5. Event aggregation

This is an optional step of the Installation Wizard. The Event aggregation tab of the Installation Wizard allows you to select or create an aggregation rule resource whose settings specify the conditions for aggregating events of the same type. More than one aggregation rule can be added to a collector.

To add an existing aggregation rule to a set of collector resources:

Click the Add aggregation rule button and select the required resource from the Aggregation rule drop-down menu.

To add a new aggregation rule to a set of collector resources:

1. Click the Add aggregation rule button and select Create new from the Aggregation rule drop-down menu.
2. Enter the name of the newly created filter in the Name field. The name must contain from 1 to 128 Unicode characters.
3. In the Threshold field, specify the number of events that should be received before the aggregation rule triggers and the events are aggregated. The default value is 100.
4. In the Triggered rule lifetime field, indicate how long the program should receive events for aggregation. On the timeout, the aggregation rule is triggered and a new event is created. The default value is 60.
5. In the Identical fields section, use the Add field button to select the fields that will be used to identify the same types of events. Selected events can be deleted using the buttons with a cross icon.
6. In the Unique fields section, you can use the Add field button to select the fields that will disqualify events from aggregation even if they have fields listed in the Identical fields section. Selected events can be deleted using the buttons with a cross icon.
7. In the Sum fields section, you can use the Add field button to select the fields whose values will be summed during the aggregation process. Selected events can be deleted using the buttons with a cross icon.
8. In the Filter section, you can specify the conditions to define events that will be processed by this resource. You can select an existing filter resource from the drop-down list, or select Create new to create a new filter.

   Creating a filter in resources

   1. In the Filter drop-down list, select Create new.
   2. If you want to keep the filter as a separate resource, set the Save filter toggle switch.

      In this case, you will be able to use the created filter in various services.

      The toggle switch is turned off by default.

   3. If you toggle the Save filter switch on, enter a name for the created filter resource in the Name field. The name must contain from 1 to 128 Unicode characters.
   4. In the Conditions settings block, specify the conditions that the events must meet:
      1. Click the Add condition button.
      2. In the Left operand and Right operand drop-down lists, specify the search parameters.

         Depending on the data source selected in the Right operand field, you may see fields of additional parameters that you need to use to define the value that will be passed to the filter. For example, when choosing active list you will need to specify the name of the active list, the entry key, and the entry key field.

      3. In the operator drop-down list, select the relevant operator.

         Filter operators

         • = – the left operand equals the right operand.
         • <—the left operand is less than the right operand.
         • <=—the left operand is less than or equal to the right operand.
         • >—the left operand is greater than the right operand.
         • >=—the left operand is greater than or equal to the right operand.
         • inSubnet—the left operand (IP address) is in the subnet of the right operand (subnet).
         • contains—the left operand contains values of the right operand.
         • startsWith—the left operand starts with one of the values of the right operand.
         • endsWith—the left operand ends with one of the values of the right operand.
         • match—the left operand matches the regular expression of the right operand. The RE2 regular expressions are used.
         • inActiveList—this operator has only one operand. Its values are selected in the Key fields field and are compared with the entries in the active list selected from the Active List drop-down list.
         • inCategory—the asset in the left operand is assigned at least one of the asset categories of the right operand.
         • inActiveDirectoryGroup—the Active Directory account in the left operand belongs to one of the Active Directory groups in the right operand.
         • TIDetect—this operator is used to find events using CyberTrace Threat Intelligence (TI) data. This operator can be used only on events that have completed enrichment with data from CyberTrace Threat Intelligence. In other words, it can only be used in collectors at the destination selection stage and in correlators.
      4. If necessary, select the do not match case check box. When this check box is selected, the operator ignores the case of the values.

         The selection of this check box does not apply to the InSubnet, InActiveList, InCategory or InActiveDirectoryGroup operators.

         This check box is cleared by default.

      5. If you want to add a negative condition, select If not from the If drop-down list.
      6. You can add multiple conditions or a group of conditions.
   5. If you have added multiple conditions or groups of conditions, choose a search condition (and, or, not) by clicking the AND button.
   6. If you want to add existing filters that are selected from the Select filter drop-down list, click the Add filter button.

      You can view the nested filter settings by clicking the button.

Aggregation rule added. You can delete it using the button.

Proceed to the next step of the Installation Wizard.

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