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DNS HybridConnectionManager Service Bus

Sigma Rules

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Summary
This detection rule is designed to monitor and identify instances of the Azure Hybrid Connection Manager service that are querying Azure Service Bus endpoints, specifically those associated with 'servicebus.windows.net'. By examining DNS queries made by the Hybrid Connection Manager, the rule aims to uncover potentially malicious persistence mechanisms where adversaries may attempt to leverage legitimate Azure services for nefarious purposes. The detection operates by filtering on specific query names that match 'servicebus.windows.net' and correlating these with instances where the HybridConnectionManager executable is in use. A high alert level indicates a strong focus on detecting potential unauthorized exploitation of Azure services, with a recognition of false positives due to legitimate operations involving the Hybrid Connection Manager and Azure Service Bus services.
Categories
  • Cloud
  • Azure
  • Network
Data Sources
  • Process
  • Logon Session
  • Network Traffic
Created: 2021-04-12