Microsoft Defender ZAP (Zero-Hour Auto Purge) — Post-Delivery Email Remediation
This rule detects and correlates Microsoft Defender's Zero-hour Auto Purge (ZAP) actions on emails. It joins original email delivery events with subsequent ZAP actions (Malware ZAP or Phish ZAP) to calculate the dwell time between an email's delivery and its removal. This helps in understanding how long a malicious or phishing email was present in a user's inbox before being remediated, which is crucial for incident response and assessing potential user interaction with the threat.
Microsoft Sentinel (KQL)
