Kubernetes admission controller activity

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	Persistence (TA0003), Credential Access (TA0006)
ATT&CK Technique	Valid Accounts (T1078), Unsecured Credentials: Container API (T1552.007)
Severity	Informational

Description

A Kubernetes admission controller has been created or modified.

Attacker's Goals

• Intercept the requests to the Kubernetes API sever, records secrets, and other sensitive information.
• Modify requests to the Kubernetes API sever.

Investigative actions

• Verify whether the identity should use Kubernetes admission controllers.
• Examine the role of the Kubernetes admission controller and its intended function.
• Investigate other operations that were performed by the identity within the cluster.

Variations

Kubernetes validating admission controller was used in the organization for the first time

Synopsis

Field	Value
ATT&CK Tactic	Persistence (TA0003), Credential Access (TA0006)
ATT&CK Technique	Valid Accounts (T1078), Unsecured Credentials: Container API (T1552.007)
Severity	Low

Description

A validating Kubernetes admission controller has been created or modified.

Attacker's Goals

• Intercept the requests to the Kubernetes API sever, records secrets, and other sensitive information.
• Modify requests to the Kubernetes API sever.

Investigative actions

• Verify whether the identity should use Kubernetes admission controllers.
• Examine the role of the Kubernetes admission controller and its intended function.
• Investigate other operations that were performed by the identity within the cluster.

Kubernetes mutating admission controller was used in the organization for the first time

Synopsis

Field	Value
ATT&CK Tactic	Persistence (TA0003), Credential Access (TA0006)
ATT&CK Technique	Valid Accounts (T1078), Unsecured Credentials: Container API (T1552.007)
Severity	Medium

Description

A mutating Kubernetes admission controller has been created or modified.

Attacker's Goals

• Intercept the requests to the Kubernetes API sever, records secrets, and other sensitive information.
• Modify requests to the Kubernetes API sever.

Investigative actions

• Verify whether the identity should use Kubernetes admission controllers.
• Examine the role of the Kubernetes admission controller and its intended function.
• Investigate other operations that were performed by the identity within the cluster.

Kubernetes validating admission controller was used in the cluster for the first time

Synopsis

Field	Value
ATT&CK Tactic	Persistence (TA0003), Credential Access (TA0006)
ATT&CK Technique	Valid Accounts (T1078), Unsecured Credentials: Container API (T1552.007)
Severity	Low

Description

A validating Kubernetes admission controller has been created or modified.

Attacker's Goals

• Intercept the requests to the Kubernetes API sever, records secrets, and other sensitive information.
• Modify requests to the Kubernetes API sever.

Investigative actions

• Verify whether the identity should use Kubernetes admission controllers.
• Examine the role of the Kubernetes admission controller and its intended function.
• Investigate other operations that were performed by the identity within the cluster.

Kubernetes mutating admission controller was used in the cluster for the first time

Synopsis

Field	Value
ATT&CK Tactic	Persistence (TA0003), Credential Access (TA0006)
ATT&CK Technique	Valid Accounts (T1078), Unsecured Credentials: Container API (T1552.007)
Severity	Medium

Description

A mutating Kubernetes admission controller has been created or modified.

Attacker's Goals

• Intercept the requests to the Kubernetes API sever, records secrets, and other sensitive information.
• Modify requests to the Kubernetes API sever.

Investigative actions

• Verify whether the identity should use Kubernetes admission controllers.
• Examine the role of the Kubernetes admission controller and its intended function.
• Investigate other operations that were performed by the identity within the cluster.