You can create orchestration rules in USM Anywhere that automatically trigger a Tenable.io response action when vulnerabilitiesA known issue or weakness in a system, procedure, internal control, software package, or hardware that could be used to compromise security. match the criteria that you specify. After you create a rule, new vulnerabilities that match the rule conditions will trigger the Tenable.io response action to create a new incident. The rule does not trigger for existing vulnerabilities.
You can create a new rule as follows:
From the Rules page: The Rules page provides access to all of your orchestration rules. The Orchestration Rules list includes suppression rules, alarm rules,
event rules, filtering rules, notification rules, and response action rules. You can create new rules using the specific matching conditions that you define, as well as edit, delete, and enable or disable rules. See Orchestration Rules for more information about managing orchestration rules.
Go to Settings > Rules and select Response Action Rules on the left navigation panel. Then click Create Response Action Rule to define the new rule.
From the App: Go to the AlienApp for Tenable.io page and click the Rules tab. Click Create New Rule to define the new rule.
To define a new AlienApp for Tenable.io response action rule
Enter a name for the rule.
Select the App Action for the rule and specify the information for the AlienApp for Tenable.io incident.
At the bottom of the dialog box, set the Rule Condition parameters to specify the criteria for a matching vulnerability to trigger the rule.
- If you create the rule from the Rules page, you must use the Add Condition and Add Group functions to define the property/value pairs that you want to use as conditions for the rule.
- At the bottom of the dialog box, click More to display the optional multiple occurrence and window length parameters.
Select an operator and add one or more conditions to form the conditional expression. You can include a condition group to evaluate a subset of conditions. The Current Rule pane displays the constructed expression in standard syntax. The box displays a red border if the expression is syntactically invalid as currently specified. A valid expression is required to save the rule definition.
Select the operator used to determine the match for multiple conditions:
- AND: Match all conditions.
- OR: Match any one condition.
- AND NOT: Exclude items matching all conditions after the first.
- OR NOT: Include all items that do not match any conditions after the first.
Click Add Condition to add a condition. For each condition, specify the field name, evaluator, and value. If the evaluation returns true for the condition, it is a match.
Click Add Group to add a condition group. A new group includes a condition and its own operator used to match the conditions within the group. You can nest condition groups.Occurrences
Specify the number of event or alarm occurrences that produce a match on the conditional expression to trigger the rule. The default value is 1. You can enter the number of occurrences or use the arrow to scroll the value up or down.
USM Anywhere uses this in conjunction with the Length option to specify the number of occurrences within a time period that will trigger the rule. For example, you can define a rule to trigger for an unauthorized access attempt when a failed SSHProgram to securely log into another computer over a network, execute commands in a remote machine, and move files from one machine to another through Secure Copy (SCP). login occurs three times within a five-minute window.Length
Specify the length of the window to identify a match for multiple occurrences. Enter the number and choose a time unit value of seconds, minutes, or hours. This time period identifies the amount of time that transpires from the first occurrence to the last occurrence. If the number of occurrences is not met within this period, the rule does not trigger.
- Click Save Rule.
- In the confirmation dialog box, click OK.