Elastic Security Detection Rules

Exchange Mailbox Export via PowerShell

Last updated 5 months ago on 2025-03-20
Created 3 years ago on 2023-01-11

About

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.
Tags
Domain: EndpointOS: WindowsUse Case: Threat DetectionTactic: CollectionData Source: PowerShell LogsLanguage: kuery
Severity
medium
Risk Score
47
MITRE ATT&CK™

Collection (TA0009)(opens in a new tab or window)

↳ Data from Local System (T1005)(opens in a new tab or window)

↳ Email Collection (T1114)(opens in a new tab or window)

False Positive Examples
Legitimate exchange system administration activity.
License
Elastic License v2(opens in a new tab or window)

Definition

Rule Type
Query (Kibana Query Language)
Integration Pack
Prebuilt Security Detection Rules
Index Patterns
winlogbeat-*logs-windows.powershell*
Related Integrations

windows(opens in a new tab or window)

Query
event.category:process and host.os.type:windows and
  powershell.file.script_block_text : "New-MailboxExportRequest"

Install detection rules in Elastic Security

Detect Exchange Mailbox Export via PowerShell in the Elastic Security detection engine by installing this rule into your Elastic Stack.

To setup this rule, check out the installation guide for Prebuilt Security Detection Rules(opens in a new tab or window).