Rules: Kubernetes Service Account Created in Kube Namespace
Detect when a user is creating a service account in one of the Kubernetes default namespaces. The only users creating service accounts in the kube-system namespace should be cluster administrators. Furthermore, it is best practice to not run any cluster critical infrastructure in the kube-system namespace. The kube-public namespace is intended for kubernetes objects which should be readable by unauthenticated users. Thus, a service account should likely not be created in the kube-public namespace.
| Detail | Value |
|---|---|
| Type | Templated Match |
| Category | Execution |
| Apply Risk to Entities | device_hostname, device_ip, user_username, dstDevice_ip |
| Signal Name | Kubernetes Service Account Created in Kube Namespace |
| Summary Expression | User: {{user_username}} created service account |
| Score/Severity | Static: 2 |
| Enabled by Default | True |
| Prototype | False |
| Tags | _mitreAttackTactic:TA0003, _mitreAttackTechnique:T1136, _mitreAttackTechnique:T1136.003, _mitreAttackTechnique:T1136.001, _mitreAttackTechnique:T1136.002 |
| Origin | Field |
|---|---|
| Normalized Schema | device_hostname |
| Normalized Schema | device_ip |
| Normalized Schema | device_k8s_namespace |
| Normalized Schema | dstDevice_ip |
| Normalized Schema | metadata_deviceEventId |
| Normalized Schema | metadata_product |
| Normalized Schema | metadata_vendor |
| Normalized Schema | resource |
| Normalized Schema | user_username |