Prioritize incidents in Microsoft 365 Defender

Important

The improved Microsoft 365 security center is now available. This new experience brings Defender for Endpoint, Defender for Office 365, Microsoft 365 Defender, and more into the Microsoft 365 security center. Learn what's new.

Applies to:

  • Microsoft 365 Defender

Microsoft 365 Defender applies correlation analytics and aggregates related alerts and automated investigations from different products into an incident. Microsoft 365 Defender also triggers unique alerts on activities that can only be identified as malicious given the end-to-end visibility that Microsoft 365 Defender has across the entire suite of products. This view gives your security analysts the broader attack story, which help them better understand and deal with complex threats across your organization.

The Incident queue shows a collection of incidents that were created across devices, users, and mailboxes. It helps you sort through incidents to prioritize and create an informed cybersecurity response decision.

You get to the incident queue from Incidents & alerts > Incidents on the quick launch of the Microsoft 365 security center (security.microsoft.com). Here's an example.

Example of the incident queue

The Most recent incidents and alerts section shows a graph of the number of alerts received and incidents created in the last 24 hours.

By default, the incident queue in the Microsoft 365 security center displays incidents seen in the last six months. The most recent incident is at the top of the list so you can see it first.

The incident queue has customizable columns (select Choose columns) that give you visibility into different characteristics of the incident or the impacted entities. This helps you make an informed decision regarding the prioritization of incidents for analysis.

For additional visibility at a glance, automatic incident naming generates incident names based on alert attributes such as the number of endpoints affected, users affected, detection sources, or categories. This allows you to quickly understand the scope of the incident.

For example: Multi-stage incident on multiple endpoints reported by multiple sources.

Note

Incidents that existed prior the rollout of automatic incident naming will not have their name changed.

The incident queue also exposes multiple filtering options, that when applied, enable you to perform a broad sweep of all existing incidents in your environment, or decide to focus on a specific scenario or threat. Applying filters on the incident queue can help determine which incident requires immediate attention.

Available filters

From the default incident queue, you can select Filters to see a Filters pane, from which you can view a filtered set of incidents. Here is an example.

Example of the filters pane for the incident queue

This table lists the filter names that are available.

Filter name Description
Assigned to You can choose to show alerts that are assigned to you or those handled by automation.
Categories Choose categories to focus on specific tactics, techniques, or attack components seen.
Classification Filter incidents based on the set classifications of the related alerts. The values include true alerts, false alerts, or not set.
Data sensitivity Some attacks focus on targeting to exfiltrate sensitive or valuable data. By applying a filter to see if sensitive data is involved in the incident, you can quickly determine if sensitive information has potentially been compromised and prioritize addressing those incidents.

Only applicable if Microsoft Information Protection is turned on.
Device group Filter by defined device groups.
Investigation state Filter incidents by the status of automated investigation.
Multiple categories You can choose to see only incidents that have mapped to multiple categories and can thus potentially cause more damage.
Multiple service sources Filter to only see incidents that contain alerts from different sources (Microsoft Defender for Endpoint, Microsoft Cloud App Security, Microsoft Defender for Identity, Microsoft Defender for Office 365).
OS platform Limit the incident queue view by operating system.
Service sources By choosing a specific source, you can focus on incidents that contain at least one alert from that chosen source.
Severity The severity of an incident is indicative of the impact it can have on your assets. The higher the severity, the bigger the impact and typically requires the most immediate attention.
Status You can choose to limit the list of incidents shown based on their status to see which ones are active or resolved.

Next steps

After you've determined which incident requires the highest priority, select it and:

  • Manage the properties of the incident for tags, assignment to a security analyst, and comments.
  • Begin your investigation.

See also