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MediumElastic detection rulesElastic

Azure AKS API Server Proxying Request to Kubelet

Detects a non-system identity using the AKS (Azure Kubernetes Service) API server nodes/proxy subresource to reach a node's Kubelet. Proxying through the API server reaches the Kubelet API to enumerate pods or run…

Description

Detects a non-system identity using the AKS (Azure Kubernetes Service) API server nodes/proxy subresource to reach a node's Kubelet. Proxying through the API server reaches the Kubelet API to enumerate pods or run commands on nodes, a lateral-movement and privilege-escalation vector (kubeletctl, Peirates). Node, control-plane, and kube-system service account identities that routinely proxy for monitoring are excluded, so remaining matches, including compromised workload service accounts, are surfaced for review.

Detection logic

Its licence does not clear it for publishing here

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Detection requirements

Platform
ContainersESXiLinuxmacOSWindows

The rule states no platform. This is derived from the 2 ATT&CK techniques it maps to.

Log source category
event_index

Known benign triggers

  • Monitoring and log-collection agents that run outside kube-system (for example a metrics agent in its own namespace) proxy to the Kubelet on every scrape and will match repeatedly. Add targeted exclusions for verified monitoring service accounts and namespaces after review.

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