Failed MSExchange Transport Agent Installation

 1title: Failed MSExchange Transport Agent Installation
 2id: c7d16cae-aaf3-42e5-9c1c-fb8553faa6fa
 3status: test
 4description: Detects a failed installation of a Exchange Transport Agent
 5references:
 6    - https://speakerdeck.com/heirhabarov/hunting-for-persistence-via-microsoft-exchange-server-or-outlook?slide=8
 7author: Tobias Michalski (Nextron Systems)
 8date: 2021-06-08
 9modified: 2022-07-12
10tags:
11    - attack.persistence
12    - attack.t1505.002
13logsource:
14    service: msexchange-management
15    product: windows
16    # warning: The 'data' field used in the detection section is the container for the event data as a whole. You may have to adapt the rule for your backend accordingly
17detection:
18    selection:
19        EventID: 6
20        Data|contains: 'Install-TransportAgent'
21    condition: selection
22fields:
23    - AssemblyPath
24falsepositives:
25    - Legitimate installations of exchange TransportAgents. AssemblyPath is a good indicator for this.
26level: high