Kubernetes Pod Created With HostPIDedit
This rule detects an attempt to create or modify a pod attached to the host PID namespace. HostPID allows a pod to access all the processes running on the host and could allow an attacker to take malicious action. When paired with ptrace this can be used to escalate privileges outside of the container. When paired with a privileged container, the pod can see all of the processes on the host. An attacker can enter the init system (PID 1) on the host. From there, they could execute a shell and continue to escalate privileges to root.
Rule type: query
Rule indices:
- logs-kubernetes.*
Severity: medium
Risk score: 47
Runs every: 5m
Searches indices from: None (Date Math format, see also Additional look-back time)
Maximum alerts per execution: 100
References:
Tags:
- Data Source: Kubernetes
- Tactic: Execution
- Tactic: Privilege Escalation
Version: 203
Rule authors:
- Elastic
Rule license: Elastic License v2
Investigation guideedit
Setupedit
The Kubernetes Fleet integration with Audit Logs enabled or similarly structured data is required to be compatible with this rule.
Rule queryedit
event.dataset : "kubernetes.audit_logs"
and kubernetes.audit.annotations.authorization_k8s_io/decision:"allow"
and kubernetes.audit.objectRef.resource:"pods"
and kubernetes.audit.verb:("create" or "update" or "patch")
and kubernetes.audit.requestObject.spec.hostPID:true
and not kubernetes.audit.requestObject.spec.containers.image: ("docker.elastic.co/beats/elastic-agent:8.4.0")
Framework: MITRE ATT&CKTM
-
Tactic:
- Name: Privilege Escalation
- ID: TA0004
- Reference URL: https://attack.mitre.org/tactics/TA0004/
-
Technique:
- Name: Escape to Host
- ID: T1611
- Reference URL: https://attack.mitre.org/techniques/T1611/
-
Tactic:
- Name: Execution
- ID: TA0002
- Reference URL: https://attack.mitre.org/tactics/TA0002/
-
Technique:
- Name: Deploy Container
- ID: T1610
- Reference URL: https://attack.mitre.org/techniques/T1610/