title: Remove Exported Mailbox from Exchange Webserver
id: 09570ae5-889e-43ea-aac0-0e1221fb3d95
status: experimental
description: Detects removal of an exported Exchange mailbox which could be to cover tracks from ProxyShell exploit
references:
    - https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/windows/http/exchange_proxyshell_rce.rb#L430
author: Christian Burkard
date: 2021/08/27
logsource:        
    service: msexchange-management
    product: windows
detection:
    command: 
        - 'Remove-MailboxExportRequest'
        - ' -Identity '
        - ' -Confirm "False"'
    condition: all of command
falsepositives:
    - Unknown
level: high
tags:
    - attack.defense_evasion
    - attack.t1070
