Rules Contributing to Suspicious Azure Kubernetes Activity: Defense Evasion Alert

The following rules are used to identify suspicious Azure Kubernetes activity usually in the defense evasion stage. Any one or more of these will trigger the Suspicious Azure Kubernetes Activity: Defense Evasion Alert. Details for each rule can be viewed by clicking the More Details link in the description.

Title

Description

Azure Kubernetes Events Deleted

Detects when Events are deleted in Azure Kubernetes. An adversary may delete events in Azure Kubernetes in an attempt to evade detection.

Rule ID

azure_58

Query

{'selection': {'operationName': 'MICROSOFT.KUBERNETES/CONNECTEDCLUSTERS/EVENTS.K8S.IO/EVENTS/DELETE'}, 'condition': 'selection'}

Log Source

Stellar Cyber Microsoft Entra Events configured.

Rule Source

SigmaHQ,225d8b09-e714-479c-a0e4-55e6f29adf35

Author: Austin Songer @austinsonger

Tactics, Techniques, and Procedures

TA0005, T1562.001

References

Severity

50

Suppression Logic Based On

  • azure_activity_log.resourceId
  • azure_activity_log.operationName
  • stellar.rule_id

Additional Information

Maturity Creation Date Risk Level False Positives
test 2021/07/24 medium

  • Event deletions may be done by a system or network administrator. Verify whether the username, hostname, and/or resource name should be making changes in your environment. Events deletions from unfamiliar users or hosts should be investigated. If known behavior is causing false positives, it can be exempted from the rule.