In Cortex XDR, aCustom Prevention ruleoften leveragesBehavioral Indicators of Compromise (BIOCs)to detect specific patterns or behaviors on endpoints. When a rule generates a false positive alert for authorized and expected behavior, tuning is required to prevent future false alerts. The question assumes the alert is related to a BIOC triggered by the Custom Prevention rule, and the goal is to suppress or refine the alert without disrupting security.
* Correct Answer Analysis (A, B):
* A. Apply an alert exception: Analert exceptioncan be created in Cortex XDR to suppress alerts for specific conditions, such as a particular endpoint, user, or behavior. This is a quick way to prevent false positive alerts for authorized behavior without modifying the underlying rule, ensuring the behavior is ignored in future detections.
* B. Apply an alert exclusion to the XDR behavioral indicator of compromise (BIOC) alert:
Analert exclusionspecifically targets BIOC alerts, allowing administrators to exclude certain BIOCs from triggering alerts on specific endpoints or under specific conditions. This is an effective way to tune the Custom Prevention rule by suppressing the BIOC alert for the authorized behavior.
* Why not the other options?
* C. Apply an alert exclusion to the XDR agent alert: This option is incorrect because alert exclusions are applied to BIOCs or specific alert types, not to generic"XDR agent alerts." The term "XDR agent alert" is not a standard concept in Cortex XDR for exclusions, making this option invalid.
* D. Modify the behavioral indicator of compromise (BIOC) logic: While modifying the BIOC logic could prevent false positives, it risks altering the rule's effectiveness for other endpoints or scenarios. Since the behavior is authorized only on the affected endpoint, modifying the BIOC logic is less targeted than applying an exception or exclusion and is not one of the best steps in this context.
Exact Extract or Reference:
TheCortex XDR Documentation Portalexplains alert tuning: "Alert exceptions suppress alerts for specific conditions, such as authorized behaviors, without modifying rules. Alert exclusions can be applied to BIOC alerts to prevent false positives on specific endpoints" (paraphrased from the Alert Management section). The EDU-262: Cortex XDR Investigation and Responsecourse covers alert tuning, stating that "exceptions and BIOC exclusions are used to handle false positives for authorized behaviors" (paraphrased from course materials). ThePalo Alto Networks Certified XDR Engineer datasheetincludes "detection engineering" as a key exam topic, encompassing alert tuning and BIOC management.
References:
Palo Alto Networks Cortex XDR Documentation Portal:https://docs-cortex.paloaltonetworks.com/ EDU-262: Cortex XDR Investigation and Response Course Objectives Palo Alto Networks Certified XDR Engineer Datasheet:https://www.paloaltonetworks.com/services/education
/certification#xdr-engineer