title: Enable Microsoft Dynamic Data Exchange
id: 63647769-326d-4dde-a419-b925cc0caf42
description: Enable Dynamic Data Exchange protocol (DDE) in all supported editions of Microsoft Word or Excel.
author: frack113
date: 2022/02/26
status: experimental
references:
    - https://msrc.microsoft.com/update-guide/vulnerability/ADV170021
logsource:
    category: registry_event
    product: windows
detection:
    selection_word:
        EventType: SetValue
        TargetObject|endswith: \Word\Security\AllowDDE
        Details: 
            - DWORD (0x00000001)
            - DWORD (0x00000002)
    selection_excel:
        EventType: SetValue
        TargetObject|endswith:
            - \Excel\Security\DisableDDEServerLaunch    
            - \Excel\Security\DisableDDEServerLookup
        Details: DWORD (0x00000000)
    condition: 1 of selection_*
falsepositives:
    - Unknown
level: medium
tags:
  - attack.execution
  - attack.t1559.002
