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ingest-k8s-audit-ocsf

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Mis à jour11 juillet 2026 à 02:43

Convert raw Kubernetes audit logs (`audit.k8s.io/v1`) into normalized API activity records, with OCSF as the default wire format and native output as an option. Maps user, source IP, verb, objectRef, and response status with enough fidelity for K8s privilege-escalation and secret-access detectors. Use when the user mentions Kubernetes audit logs, kube-apiserver audit sinks, K8s detection engineering, or feeding K8s audit into a SIEM. Do NOT use for container runtime logs, kubelet logs, or CloudTrail / GCP audit / Azure Activity. Do NOT use as a detection skill; this only normalizes events.

Installation

Installer avec Codex ou Claude Copiez ce prompt, collez-le dans Codex, Claude ou un autre assistant, puis laissez-le vérifier la page du skill et l'installer pour vous.

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msaad00

msaad00/cloud-ai-security-skills

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Métiers associésSOC

Basé sur la classification professionnelle SOC

Administrateurs de réseaux et de systèmes informatiquesProfessions informatiques et mathématiques·SOC 15-1244

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name	ingest-k8s-audit-ocsf
description	Convert raw Kubernetes audit logs (`audit.k8s.io/v1`) into normalized API activity records, with OCSF as the default wire format and native output as an option. Maps user, source IP, verb, objectRef, and response status with enough fidelity for K8s privilege-escalation and secret-access detectors. Use when the user mentions Kubernetes audit logs, kube-apiserver audit sinks, K8s detection engineering, or feeding K8s audit into a SIEM. Do NOT use for container runtime logs, kubelet logs, or CloudTrail / GCP audit / Azure Activity. Do NOT use as a detection skill; this only normalizes events.
purpose	Convert raw Kubernetes audit logs (`audit.k8s.io/v1`) into normalized API activity records, with OCSF as the default wire format and native output as an option. Maps user, source IP, verb, objectRef, and response stat...
capability	ingest
persistence	none
telemetry	stderr_jsonl
privilege_escalation	none
license	Apache-2.0
approval_model	none
execution_modes	jit, ci, mcp, persistent
side_effects	none
input_formats	raw
output_formats	native, ocsf
concurrency_safety	stateless

ingest-k8s-audit-ocsf

Thin, single-purpose ingestion skill: raw Kubernetes audit logs in → OCSF 1.8 API Activity JSONL out by default, with an optional native enriched event shape when --output-format native is selected. No detection logic, no K8s API calls, no side effects.

Wire contract

Reads the audit.k8s.io/v1 Event object that kube-apiserver writes to its audit sink:

{
  "kind": "Event",
  "apiVersion": "audit.k8s.io/v1",
  "level": "RequestResponse",
  "auditID": "abc-123",
  "stage": "ResponseComplete",
  "requestURI": "/api/v1/namespaces/default/secrets",
  "verb": "list",
  "user": {
    "username": "system:serviceaccount:default:default",
    "groups": ["system:serviceaccounts", "system:authenticated"]
  },
  "sourceIPs": ["10.0.0.1"],
  "userAgent": "kubectl/v1.28",
  "objectRef": {
    "resource": "secrets",
    "namespace": "default",
    "apiVersion": "v1"
  },
  "responseStatus": {"metadata": {}, "code": 200},
  "requestReceivedTimestamp": "2026-04-10T05:00:00.000000Z",
  "stageTimestamp": "2026-04-10T05:00:00.100000Z",
  "annotations": {"authorization.k8s.io/decision": "allow"}
}

Writes OCSF 1.8 API Activity (class_uid: 6003, category_uid: 6) by default. With --output-format native, writes the repo's native enriched API activity shape instead of the OCSF envelope.

Filtering by stage

K8s audit events are emitted at 4 stages: RequestReceived, ResponseStarted, ResponseComplete, Panic. The skill processes only ResponseComplete and Panic events — those are the ones with authoritative responseStatus. Earlier-stage events are skipped with a stderr debug line.

Field mapping

The K8s verb → activity_id table, the responseStatus.code → status_id rules, the full K8s-field → OCSF-field map, the unmapped.k8s.* preservation rules, the service-account marker, and the native output field list live in references/field-map.md. Keeping the detail there keeps this file under the progressive-disclosure target (#247) while detectors and reviewers still get the exact mapping one click away.

Usage

# Audit log file (as written by kube-apiserver)
python src/ingest.py /var/log/k8s-audit.log > k8s-audit.ocsf.jsonl

# Piped from a dynamic webhook sink
kubectl logs -n kube-system audit-webhook-receiver \
  | python src/ingest.py

# Native enriched output (same source truth, no OCSF envelope)
python src/ingest.py --output-format native /var/log/k8s-audit.log > k8s-audit.native.jsonl

Tests

Golden fixture parity against ../golden/k8s_audit_raw_sample.jsonl → ../golden/k8s_audit_sample.ocsf.jsonl.