Analytics BIOC Low

Remote usage of an Azure Managed Identity token

An Azure Managed Identity token, which is attached to a compute service, was used externally of the cloud environment.

Module:
Cortex Cloud
Licensed by:
Cloud Runtime Security (CRS)
Data source:
Azure Audit Log
ATT&CK tactics: Credential Access (TA0006)
ATT&CK techniques: Steal Application Access Token (T1528) Unsecured Credentials (T1552)
Detector tags: Cloud Serverless Function Credentials Theft Analytics
Attacker's goals:

Exfiltrate valid token and abuse it remotely.

Investigative actions:

Verify whether the Managed Identity should be used remotely. Check what API calls were executed by the Managed Identity. Check if the relevant compute service is compromised.

Test period:
N/A (single event)
Deduplication:
5 Days
4 variations:
  • Remote usage of an Azure Function App's Managed Identity token Medium (parent: Low)
  • Remote usage of an Azure Automation Account's Managed Identity token Medium (parent: Low)
  • Remote usage of an Azure Managed Identity token from an unusual ASN High (parent: Low)
  • Remote usage of an Azure Managed Identity token from an unusual IP Medium (parent: Low)