Microsoft Exchange Transport Agent Install Script

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Microsoft Exchange Transport Agent Install Script

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Identifies the use of Cmdlets and methods related to Microsoft Exchange Transport Agents install. Adversaries may leverage malicious Microsoft Exchange Transport Agents to execute tasks in response to adversary-defined criteria, establishing persistence.

Rule type: query

Rule indices:

  • winlogbeat-*
  • logs-windows.*

Severity: low

Risk score: 21

Runs every: 60m

Searches indices from: now-119m (Date Math format, see also Additional look-back time)

Maximum alerts per execution: 100

References: None

Tags:

  • Domain: Endpoint
  • OS: Windows
  • Use Case: Threat Detection
  • Tactic: Persistence
  • Data Source: PowerShell Logs
  • Rule Type: BBR

Version: 1

Rule authors:

  • Elastic

Rule license: Elastic License v2

Investigation guide

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## Setup

Rule query

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event.category: "process" and host.os.type:windows and
  powershell.file.script_block_text : (
    (
    "Install-TransportAgent" or
    "Enable-TransportAgent"
    )
  ) and not user.id : "S-1-5-18"

Framework: MITRE ATT&CKTM