PST Export Alert Using eDiscovery Alert

calendar Oct 17, 2023 · attack.collection attack.t1114  ·
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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

Sigma rule (View on GitHub)

 1title: PST Export Alert Using eDiscovery Alert
 2id: 18b88d08-d73e-4f21-bc25-4b9892a4fdd0
 3related:
 4    - id: 6897cd82-6664-11ed-9022-0242ac120002
 5      type: similar
 6status: test
 7description: 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
 8references:
 9    - https://learn.microsoft.com/en-us/microsoft-365/compliance/alert-policies?view=o365-worldwide
10author: Sorina Ionescu
11date: 2022/02/08
12modified: 2022/11/17
13tags:
14    - attack.collection
15    - attack.t1114
16logsource:
17    service: threat_management
18    product: m365
19    definition: Requires the 'eDiscovery search or exported' alert to be enabled
20detection:
21    selection:
22        eventSource: SecurityComplianceCenter
23        eventName: 'eDiscovery search started or exported'
24        status: success
25    condition: selection
26falsepositives:
27    - PST export can be done for legitimate purposes but due to the sensitive nature of its content it must be monitored.
28level: medium

References

  • Microsoft 365 alert policies

    Create alert policies in the Microsoft Purview compliance portal or the Microsoft Defender portal to monitor potential threats, data loss, and permissions issues.


    Read More

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