Microsoft Security Operations Analyst

You need to use an anomaly detection policy that identifies when a user attempts to sign in from a location that has never been used by other users in the organization. The 'Activity from infrequent country' policy checks for sign-ins from locations that have not been previously used by any user in the organization, making it the most appropriate choice for this requirement.

To detect which documents are sensitive, especially when looking for a specific pattern like a 32-character alphanumeric account number, RegEx pattern matching is the appropriate tool. Regular expressions allow you to define and search for specific patterns within text, making it possible to identify documents containing the sensitive information required. SharePoint search is more general and wouldn't necessarily recognize specific patterns like a 32-character alphanumeric string. A hunting query in Microsoft 365 Defender is designed for threat detection, not specific data patterns in documents. Azure Information Protection focuses on labeling and classifying documents rather than detecting them based on character patterns.

To prevent users from downloading and running additional payloads from Office VBA macros as additional child processes, you should enable the specific attack surface reduction (ASR) rule related to blocking Office applications from creating child processes. Both commands 'Add-MpPreference' and 'Set-MpPreference' can be used to achieve this, but each serves a different purpose. 'Add-MpPreference' adds a new rule without affecting existing rules, while 'Set-MpPreference' sets the rule and overwrites any existing rules. Therefore, the correct choices are: A. Add-MpPreference -AttackSurfaceReductionRules_Ids D4F940AB-401B-4EFC-AADC-AD5F3C50688A -AttackSurfaceReductionRules_Actions Enabled and D. Set-MpPreference -AttackSurfaceReductionRules_Ids D4F940AB-401B-4EFC-AADC-AD5F3C50688A -AttackSurfaceReductionRules_Actions Enabled. These commands prevent users from running additional payloads as child processes, aligning with the requirement to prevent, not just audit.

To hide false positives in the Alerts queue while maintaining the existing security posture, you need to hide the alert, create a suppression rule scoped to a device group, and generate the alert. Hiding the alert removes it from view without affecting the security settings. Suppressing alerts scoped to a device group ensures that specific devices, such as those used by the accounting team, aren't inundated with false positives. Generating the alert is necessary because without generating it, you cannot hide or create suppression rules for it.