HybridConnectionManager Service Running — Sigma Rule

Rule metadata and linked tags

Author: Roberto Rodriguez (Cyb3rWard0g), OTR (Open Threat Research). Source status: test; severity: high. Source dates: 2021-04-12 / 2024-08-05.

{
  "product": "windows",
  "service": "microsoft-servicebus-client"
}

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: 4418a7d691bce51ba36f772262add6130f0fc25b1c7024b867878e6a9480c3be

Detection logic

Original source YAML. Source-tag agreement is not proof of complete semantic coverage. This rule has not been compiled for a SIEM backend or validated against live telemetry here.

title: HybridConnectionManager Service Running
id: b55d23e5-6821-44ff-8a6e-67218891e49f
status: test
description: Rule to detect the Hybrid Connection Manager service running on an endpoint.
references:
    - https://twitter.com/Cyb3rWard0g/status/1381642789369286662
author: Roberto Rodriguez (Cyb3rWard0g), OTR (Open Threat Research)
date: 2021-04-12
modified: 2024-08-05
tags:
    - attack.persistence
    - attack.t1554
logsource:
    product: windows
    service: microsoft-servicebus-client # Change to servicebus-client once validators are up to date
detection:
    selection:
        EventID:
            - 40300
            - 40301
            - 40302
    keywords:
        - 'HybridConnection'
        - 'sb://'
        - 'servicebus.windows.net'
        - 'HybridConnectionManage'
    condition: selection and keywords
falsepositives:
    - Legitimate use of Hybrid Connection Manager via Azure function apps.
level: high

Original YAML and metadata in JSON

False positives

• Legitimate use of Hybrid Connection Manager via Azure function apps.

Source references

• https://twitter.com/Cyb3rWard0g/status/1381642789369286662