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 PowerShell
editExporting Exchange Mailbox via PowerShell
editIdentifies 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: 5m
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: 7
Rule authors:
- Elastic
Rule license: Elastic License v2
Investigation guide
edit## Config If enabling an EQL rule on a non-elastic-agent index (such as beats) for versions <8.2, events will not define `event.ingested` and default fallback for EQL rules was not added until 8.2, so you will need to add a custom pipeline to populate `event.ingested` to @timestamp for this rule to work.
Rule query
editprocess where event.type in ("start", "process_started") and
process.name: ("powershell.exe", "pwsh.exe", "powershell_ise.exe") and process.args : "New-MailboxExportRequest*"
Framework: MITRE ATT&CKTM
-
Tactic:
- Name: Collection
- ID: TA0009
- Reference URL: https://attack.mitre.org/tactics/TA0009/
-
Technique:
- Name: Data from Local System
- ID: T1005
- Reference URL: https://attack.mitre.org/techniques/T1005/
-
Technique:
- Name: Email Collection
- ID: T1114
- Reference URL: https://attack.mitre.org/techniques/T1114/
-
Sub-technique:
- Name: Remote Email Collection
- ID: T1114.002
- Reference URL: https://attack.mitre.org/techniques/T1114/002/