Manage quarantined files - Administrator Guide - Cortex XDR - Cortex - Security Operations

Cortex XDR Documentation
Product
Cortex XDR
Creation date
2024-03-06
Last date published
2024-10-10
Category
Administrator Guide
Abstract

You can review and manage all files that have been quarantined by the agent due to a security incident.

When the agent detects malware on a Windows endpoint, you can take additional precautions to quarantine the file. When the agent quarantines malware, it moves the file from the location on a local or removable drive to a local quarantine folder (%PROGRAMDATA%\Cyvera\Quarantine) where it isolates the file. This prevents the file from attempting to run again from the same path or causing any harm to your endpoints.

To evaluate whether an executable file is considered malicious, the agent calculates a verdict using information from the following sources in order of priority:

  • Hash exception policy

  • WildFire threat intelligence

  • Local analysis

Quarantine a file

Quarantining a file in Cortex XDR can be done in the following ways:

  • Enable the agent to automatically quarantine malicious executables by configuring quarantine settings in the Malware security profile.

  • Right-click a specific file from the causality card and select Quarantine.

View and manage quarantined files

  1. View the quarantined files in your network.

    Navigate to Incident Response → Response → Action Center → File Quarantine. Toggle between DETAILED and AGGREGATED BY SHA256 views to display information on your quarantined files.

  2. Review details about quarantined files.

    In the Detailed view, filter and review the Endpoint Name, Domain, File Path, Quarantine Source, and Quarantine Date of all the quarantined files. You can take the following actions:

    • Reinstate a quarantined file: Right-click one or more rows and select Restore all files by SHA256.

      Note

      This will restore all files with the same hash on all of your endpoints.

    • Review the quarantined file inspection results on VirusTotal: Right-click the Hash field and select Open in VirusTotal.

    • Drill down on the hash value: Right-click the Hash field and select Open Hash View. You can see each of the process executions, file operations, incidents, actions, and threat intelligence reports relating to the hash value

    • Search for where the hash value appears in Cortex XDR: Right-click the Hash field and select Open in Quick Launcher.

    • Export to file: Click the icon on the top right corner to download a detailed list of the quarantined hashes in a TSV format.

  3. In the Aggregated by SHA256 view, filter and review the Hash, File Name, File Path, and Scope of all the quarantined files. You can take the following actions:

    • Open the Quarantine Details page: Right-click a row and select Additional Data to open the page detailing the Endpoint Name, Domain, File Path, Quarantine Source, and Quarantine Date of a specific file hash.

    • Reinstate a file hash: Right-click and select Restore.

    • Permanently delete quarantined files on the endpoint: Right-click and select Delete all files by SHA256.