Cortex® XDR™ Incidents

Cortex® XDR™ provides an Incidents table that you can use to view all the incidents reported to and surfaced from your Cortex XDR instance.
An attack can affect several hosts or users and raises different alert types stemming from a single event. All artifacts, assets, and alerts from a threat event are gathered into an
Incident.
The logic behind which alert the Cortex XDR app assigns to an incident is based on a set of rules which take into account different attributes. Examples of alert attributes include alert source, type, and time period. The app extracts a set of artifacts related to the threat event, listed in each alert, and compares it with the artifacts appearing in existing alerts in the system. Alerts on the same causality chain are grouped with the same incident if an open incident already exists. Otherwise, the new incoming alert will create a new incident.
To keep incidents fresh and relevant, Cortex XDR provides thresholds after which an incident stops adding alerts:
  • 30 days after the incident was created
  • 14 days since the last alert in the incident was detected (excludes backward scan alerts)
After the incident reaches either threshold, it stops accepting alerts and Cortex XDR groups subsequent related alerts in a new incident. You can track the grouping threshold status in the
Alerts Grouping Status
field in the Incidents table:
  • Enabled
    —The incident is open to accepting new related alerts.
  • Disabled
    —Grouping threshold is reached and the incident is closed to further alerts or if the incident reached the 1,000 alert limit. To view the exact reason for a Disabled status, hover over the status field.
You can select to view the Incidents page in a table format or split pane mode. Use to toggle between the views. By default, Cortex XDR displays the split pane mode. Any changes you make to the incident fields, such as description, resolution status, filters, and sort selections persist when you toggle between the modes.
The split pane mode displays a side-by-side view of the your incidents list and the corresponding incident details.
The table view displays only the incident fields in a table format. Right-click an incident to view the incident details, and investigate the related assets, artifacts, and alerts. For more information see Investigate Incidents.
The following table describes both the default and additional optional fields that you can view in the Incidents table and lists the fields in alphabetical order.
Incidents created prior to Cortex XDR version 2.9 are updated as follows:
  • MITRE Attack Tactics, MITRE Attack Techniques, and Alert Categories fields will remain empty.
  • WildFire Hits field will begin with an empty value, however when a new alert is added to the incident the filed is updated.
  • High Severity, Medium Severity, Low Severity, Alert Grouping Status fields are updated with the corresponding value.
  • If an incident is merged or moved with other incidents, Cortex XDR will recalculate and update the fields.
Field
Description
Check box to select one or more incidents on which to perform the following actions.
  • Assign incidents to an analyst in bulk
  • Change the status of multiple incidents
  • Change the severity of multiple incidents
Alert Categories
Type of alert categories triggered by the incident alerts.
Alert Source
Source of the alert, such as XDR Analytics BIOC, XDR BIOC, and Correlation.
Alerts Grouping Status
Displays whether Alert Grouping is currently enabled.
Alerts Breakdown
The total number of alerts and number of alerts by severity.
Assignee Email
Email address associated with the assigned incident owner.
Assigned To
The user to which the incident is assigned. The assignee tracks which analyst is responsible for investigating the threat. Incidents that have not been assigned have a status of
Unassigned
.
Creation Time
Date and time when the incident was created.
High Severity Alerts
Number of high severity alerts that are part of the incident.
Hosts
Displays the host names affected by the incident.
Incident Description
The description is generated from the alert name from the first alert added to the incident, the host and user affected, or number of users and hosts affected.
Incident ID
A unique number to identify the incident.
Incident Name
A user-defined incident name.
Incident Sources
List of sources that raised high and medium severity alerts in the incident.
Last Updated
The last time a user took an action or an alert was added to the incident.
Low Severity Alerts
Number of low severity alerts that are part of the incident.
Medium Severity
Number of medium severity alerts that are part of the incident.
MITRE ATT&CK Tactic
Displays the types of MITRE ATT&CK tactics triggered by the alerts that are part of the incident.
MITRE ATT&CK Technique
Displays the type of MITRE ATT&CK technique and sub-technique triggered by the alerts that are part of the incident.
Resolve Comment
The user-added comment when the user changes the incident status to a Resolved status.
Score
Displays the score defined by the incident scoring rule.
Severity
The highest alert in the incident or the user-defined severity.
Starred
The incident includes alerts that match your incident prioritization policy. Incidents that have alert matches include a star by the incident name in the Incident details view and a value of Yes in this field.
Status
Incidents have the status set to
New
when they are generated. To begin investigating an incident, set the status to
Under Investigation
. The Resolved status is subdivided into resolution reasons:
  • Resolved - Threat Handled
  • Resolved - Known Issue
  • Resolved - Duplicate Incident
  • Resolved - False Positive
  • Resolved - Auto Resolve
    - Auto-resolved by Cortex XDR when all of the alerts contained in an incident have been excluded.
Total Alerts
The total number of alerts in the incident.
Users
Users affected by the alerts in the incident. If more than one user is affected, click on
+ <n> more
to see the list of all users in the incident.
WildFire Hits
Number of the Malware, Phishing, and Greyware artifacts that are part of the incident.

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