Windows Mail App Mailbox Access Via PowerShell Script

Detects PowerShell scripts that try to access the default Windows MailApp MailBox. This indicates manipulation of or access to the stored emails of a user. E.g. this could be used by an attacker to exfiltrate or delete the content of the emails.

title: Windows Mail App Mailbox Access Via PowerShell Script
id: 4e485d01-e18a-43f6-a46b-ef20496fa9d3
status: test
description: Detects PowerShell scripts that try to access the default Windows MailApp MailBox. This indicates manipulation of or access to the stored emails of a user. E.g. this could be used by an attacker to exfiltrate or delete the content of the emails.
references:
    - https://github.com/redcanaryco/atomic-red-team/blob/02cb591f75064ffe1e0df9ac3ed5972a2e491c97/atomics/T1070.008/T1070.008.md
author: frack113
date: 2023-07-08
tags:
    - attack.stealth
    - attack.t1070.008
    - detection.threat-hunting
logsource:
    product: windows
    category: ps_script
    definition: bade5735-5ab0-4aa7-a642-a11be0e40872
detection:
    selection:
        ScriptBlockText|contains: '\Comms\Unistore\data'
    condition: selection
falsepositives:
    - Unknown
level: medium
regression_tests_path: regression_data/rules-threat-hunting/windows/powershell/powershell_script/posh_ps_mailbox_access/info.yml

• T1070.008Clear Mailbox Data

• https://github.com/redcanaryco/atomic-red-team/blob/02cb591f75064ffe1e0df9ac3ed5972a2e491c97/atomics/T1070.008/T1070.008.md↗