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 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 conditions to identify events that will be processed by the aggregation rule 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 menu, select Create new.
   2. If you want to keep the filter as a separate resource, set the Save filter toggle switch. This can be useful if you decide to reuse the same filter across different 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 section, specify the conditions that the events must meet:
      • The Add condition button is used to add filtering conditions. You can select two values (two operands, left and right) and assign the operation you want to perform with the selected values. The result of the operation is either True or False.
        • In the operator drop-down list, select the function to be performed by the filter.

          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 filter 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.

          You can use the Match case check box in the Operator drop-down list to choose whether the values passed to the filter should be case sensitive. This check box is cleared by default.

        • In the Left operand and Right operand drop-down lists, select where the data to be filtered will come from. As a result of the selection, Advanced settings will appear. Use them to determine the exact 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.
        • You can use the If drop-down list to choose whether you want to create a negative filter condition.

        Conditions can be deleted using the button.

      • The Add group button is used to add groups of conditions. Operator AND can be switched between AND, OR, and NOT values.

        A condition group can be deleted using the button.

      • Using the Add filter button you can add existing filter resources selected in the Select filter drop-down list to the conditions. You can navigate to a nested filter resource using the button.

        A nested filter can be deleted using 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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