HybridConnectionManager Service Installation - Registry

Hunt Hypothesis

Detects the installation of the Azure Hybrid Connection Manager service to allow remote code execution from Azure function.

Detection Rule

Sigma (Original)

title: HybridConnectionManager Service Installation - Registry
id: ac8866c7-ce44-46fd-8c17-b24acff96ca8
status: test
description: Detects the installation of the Azure Hybrid Connection Manager service to allow remote code execution from Azure function.
references:
    - https://twitter.com/Cyb3rWard0g/status/1381642789369286662
author: Roberto Rodriguez (Cyb3rWard0g), OTR (Open Threat Research)
date: 2021-04-12
modified: 2022-11-27
tags:
    - attack.resource-development
    - attack.t1608
logsource:
    category: registry_event
    product: windows
detection:
    selection1:
        TargetObject|contains: '\Services\HybridConnectionManager'
    selection2:
        EventType: SetValue
        Details|contains: 'Microsoft.HybridConnectionManager.Listener.exe'
    condition: selection1 or selection2
falsepositives:
    - Unknown
level: high

KQL (Azure Sentinel)

imRegistry
| where RegistryKey contains "\\Services\\HybridConnectionManager" or (EventType =~ "RegistryValueSet" and RegistryValueData contains "Microsoft.HybridConnectionManager.Listener.exe")

KQL (Microsoft 365 Defender)

DeviceRegistryEvents
| where RegistryKey contains "\\Services\\HybridConnectionManager" or (ActionType =~ "RegistryValueSet" and RegistryValueData contains "Microsoft.HybridConnectionManager.Listener.exe")

Required Data Sources

False Positive Guidance

• Unknown

MITRE ATT&CK Context

• Tactic: Resource Development
• Technique: T1608 — T1608

References

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