Suspicious Kubernetes RBAC Binding Granting Access to Anonymous Users

ATT&CK techniques

Initial Access → Defense Evasion

Recon
Resource Dev
Initial Access
- T1078Valid Accounts
- T1190Exploit Public-Facing Application
Execution
Persistence
- T1078Valid Accounts
Priv Esc
- T1078Valid Accounts
Defense Evasion
- T1078Valid Accounts
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule detects kubectl creating a role or cluster role binding whose subject is system:anonymous or system:unauthenticated which grants API privileges to unauthenticated callers. Wiz describes this misconfiguration as a Kubernetes control plane initial access vector. This is important because binding real permissions to the anonymous group exposes the cluster API to anyone who can reach it and is a common path to full cluster compromise.

Reporting behind it

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Malicious PHASEJAM Webshell Dropped in Ivanti dana-na Auth Directory

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Suspicious Kubernetes RBAC Binding Granting Access to Anonymous Users

Pivot detection · T1190 · 9 related

Detection content is published as a reviewed draft. Tune thresholds and exclusions against your own telemetry before enabling this rule for alerting.

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