Sigma rule: PST Export Alert Using eDiscovery Alert

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-936038a08ef7, updated 2022-11-17T00:00:00.000Z.

Rule

Title
PST Export Alert Using eDiscovery Alert
Status
test
Level
medium
Author
Sorina Ionescu
Date
2022-02-08
Modified
2022-11-17
File
rules/cloud/m365/threat_management/microsoft365_pst_export_alert.yml
Commit
ccbb0369507f796db0b0ae6854c8a2be471b9d84

Alert on when a user has performed an eDiscovery search or exported a PST file from the search. This PST file usually has sensitive information including email body content

Log source

product
m365
service
threat_management
definition
Requires the 'eDiscovery search or exported' alert to be enabled

Detection

selection:
    eventSource: SecurityComplianceCenter
    eventName: 'eDiscovery search started or exported'
    status: success
condition: selection

False positives (as the rule lists them)

  • PST export can be done for legitimate purposes but due to the sensitive nature of its content it must be monitored.

Tags

  • attack.collection
  • attack.t1114

MITRE ATT&CK ids this rule names

Related rules

References

Read on 2026-11-03T00:58:21.399Z under licence sigma-drl-1.1@d5f4c36a from https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/cloud/m365/threat_management/microsoft365_pst_export_alert.yml

Sources and licences

  • SigmaHQ

    "PST Export Alert Using eDiscovery Alert" by Sorina Ionescu (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/cloud/m365/threat_management/microsoft365_pst_export_alert.yml.
    Licensed under the Detection Rule License (DRL) 1.1: https://github.com/SigmaHQ/Detection-Rule-License

    Detection Rule License (DRL) 1.1

Cite this page

Dragons Eye Ransomware Tracker, "Sigma rule: PST Export Alert Using eDiscovery Alert",
entity page, dataset version ref-936038a08ef7, updated 2022-11-17T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/18b88d08-d73e-4f21-bc25-4b9892a4fdd0 (accessed 2026-11-03).
Underlying source: SigmaHQ rule 18b88d08-d73e-4f21-bc25-4b9892a4fdd0, commit ccbb0369507f796db0b0ae6854c8a2be471b9d84.

Pages change. The dataset version identifies the data, but no archive of old versions is kept, so this citation cannot be replayed later.