IMPORTANT: No additional bug fixes or documentation updates
will be released for this version. For the latest information, see the
current release documentation.
Exporting Exchange Mailbox via PowerShelledit
Identifies the use of the Exchange PowerShell cmdlet, New-MailBoxExportRequest, to export the contents of a primary mailbox or archive to a .pst file. Adversaries may target user email to collect sensitive information.
Rule type: eql
Rule indices:
- logs-endpoint.events.*
- winlogbeat-*
- logs-windows.*
Severity: medium
Risk score: 47
Runs every: 5 minutes
Searches indices from: now-9m (Date Math format, see also Additional look-back time
)
Maximum alerts per execution: 100
References:
Tags:
- Elastic
- Host
- Windows
- Threat Detection
- Collection
Version: 4 (version history)
Added (Elastic Stack release): 7.11.0
Last modified (Elastic Stack release): 7.15.0
Rule authors: Elastic
Rule license: Elastic License v2
Potential false positivesedit
Legitimate exchange system administration activity.
Rule queryedit
process where event.type in ("start", "process_started") and process.name: ("powershell.exe", "pwsh.exe") and process.args : "New- MailboxExportRequest*"
Threat mappingedit
Framework: MITRE ATT&CKTM
-
Tactic:
- Name: Collection
- ID: TA0009
- Reference URL: https://attack.mitre.org/tactics/TA0009/
-
Technique:
- Name: Email Collection
- ID: T1114
- Reference URL: https://attack.mitre.org/techniques/T1114/
Rule version historyedit
- Version 4 (7.15.0 release)
-
- Formatting only
- Version 3 (7.12.0 release)
-
- Formatting only
- Version 2 (7.11.2 release)
-
- Formatting only