You have a Microsoft Sentinel workspace. You receive multiple alerts for failed sign in attempts to an account. You identify that the alerts are…

An automation rule can be configured to automatically close incidents that match specific criteria. In this scenario, you can create a rule that triggers when an incident is created involving the specific account identified as a false positive. The rule's action would be to change the status to "Closed" with a classification of "False Positive." This approach, often called a suppression rule, effectively prevents the alert from requiring manual investigation while allowing the underlying analytics rule to remain unchanged and continue generating alerts for other accounts. This is a highly efficient method that minimizes administrative effort.

B. Create a watchlist: A watchlist is a data source used for correlation within analytics rules. While it could hold the account name, you would still need to modify the analytics rule to use it, which is a less direct solution.

C. Modify the analytics rule: Modifying the rule's KQL query to exclude the specific account is a valid method, but it's less flexible. If the false positive occurs across multiple analytics rules, each rule would need modification, increasing administrative effort. Automation rules provide a centralized way to manage such exceptions.

D. Add an activity template to the entity behavior: Entity behavior analytics (UEBA) and its activity templates are used to define and detect anomalous user activities, not for suppressing known false positive alerts from specific analytics rules.

---

1. Microsoft Learn | Official Microsoft Sentinel Documentation. "Handle false positives in Microsoft Sentinel". This document explicitly recommends using automation rules as a primary method for suppression.

Section: "Use automation rules to suppress incidents"

Content: "You can create an automation rule to automatically close incidents that are known to be false-positives. ... Conditions in the rule can include the analytics rule name

the description

the entities

the severity

or other custom details. This type of automation rule is sometimes called a suppression rule."

2. Microsoft Learn | Official Microsoft Sentinel Documentation. "Automate incident handling in Microsoft Sentinel with automation rules". This document details the capabilities of automation rules.

Section: "Use cases and scenarios"

Content: Describes using automation rules for "Incident suppression

" stating

"Create rules to automatically close incidents that are known to be benign false positives...without affecting the operation of your analytics rules." This directly supports using automation rules to meet the question's requirements.