A Kubernetes API operation was successfully invoked by an anonymous user

Synopsis

Field	Value
Activation Period	14 Days
Training Period	30 Days
Test Period	N/A (single event)
Deduplication Period	5 Days
Required Data	Requires one of the following data sources: AWS Audit Log OR Azure Audit Log OR Gcp Audit Log OR Kubernetes Audit Logs
Detection Modules	Cloud
Detector Tags	Kubernetes - API
ATT&CK Tactic	Initial Access (TA0001)
ATT&CK Technique	Valid Accounts: Default Accounts (T1078.001)
Severity	Medium

Description

An unauthenticated user successfully invoked API calls within the Kubernetes cluster.

Attacker's Goals

Gain initial access to a Kubernetes cluster.

Investigative actions

• Determine which resources were accessed anonymously.
• Verify whether the affected resource should be accessed by unauthenticated users.

Variations

A Kubernetes API operation was successfully invoked by an anonymous user outside the cluster

Synopsis

Field	Value
ATT&CK Tactic	Initial Access (TA0001)
ATT&CK Technique	Valid Accounts: Default Accounts (T1078.001)
Severity	High

Description

An unauthenticated user successfully invoked API calls within the Kubernetes cluster.

Attacker's Goals

Gain initial access to a Kubernetes cluster.

Investigative actions

• Determine which resources were accessed anonymously.
• Verify whether the affected resource should be accessed by unauthenticated users.