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Detection rules › Sigma

MSExchange Transport Agent Installation - Builtin

Status
test
Severity
medium
Log source
product windows, service msexchange-management
Author
Tobias Michalski (Nextron Systems)
Source
github.com/SigmaHQ/sigma

Detects the Installation of a Exchange Transport Agent

Known false positives

  • Legitimate installations of exchange TransportAgents. AssemblyPath is a good indicator for this.

MITRE ATT&CK coverage

TacticTechniques
Persistence

Rule body

title: MSExchange Transport Agent Installation - Builtin
id: 4fe151c2-ecf9-4fae-95ae-b88ec9c2fca6
related:
    - id: 83809e84-4475-4b69-bc3e-4aad8568612f
      type: derived
status: test
description: Detects the Installation of a Exchange Transport Agent
references:
    - https://speakerdeck.com/heirhabarov/hunting-for-persistence-via-microsoft-exchange-server-or-outlook?slide=7
author: Tobias Michalski (Nextron Systems)
date: 2021-06-08
modified: 2022-11-27
tags:
    - attack.persistence
    - attack.t1505.002
logsource:
    product: windows
    service: msexchange-management
detection:
    selection:
        - 'Install-TransportAgent'
    condition: selection
falsepositives:
    - Legitimate installations of exchange TransportAgents. AssemblyPath is a good indicator for this.
level: medium

Stages and Predicates

Stage 0: condition

selection

Stage 1: selection

selection:
    - 'Install-TransportAgent'