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Description

This search uses the Kubernetes logs from Splunk Connect from Kubernetes to detect Kubernetes Security Scanner.

  • Type: TTP

  • Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud

  • Last Updated: 2021-08-24
  • Author: Patrick Bareiss, Splunk
  • ID: 4890cd6b-0112-4974-a272-c5c153aee551

Annotations

ATT&CK

ATT&CK

ID Technique Tactic
T1526 Cloud Service Discovery Discovery
Kill Chain Phase
  • Exploitation
NIST
  • DE.CM
CIS20
  • CIS 13
CVE 


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`kube_objects_events` object.message IN ("Pulling image *kube-hunter*", "Pulling image *kube-bench*", "Pulling image *kube-recon*", "Pulling image *kube-recon*") 
| rename object.* AS * 
| rename involvedObject.* AS * 
| rename source.host AS host 
| eval phase="operate" 
| eval severity="high" 
| stats min(_time) as firstTime max(_time) as lastTime count by host, name, namespace, kind, reason, message, phase, severity 
| `security_content_ctime(firstTime)` 
| `security_content_ctime(lastTime)` 
| `kubernetes_scanner_image_pulling_filter`

Macros

The SPL above uses the following Macros:

:information_source: kubernetes_scanner_image_pulling_filter is a empty macro by default. It allows the user to filter out any results (false positives) without editing the SPL.

Required fields

List of fields required to use this analytic.

  • object.message
  • source.host
  • object.involvedObject.name
  • object.involvedObject.namespace
  • object.involvedObject.kind
  • object.message
  • object.reason

How To Implement

You must ingest Kubernetes logs through Splunk Connect for Kubernetes.

Known False Positives

unknown

Associated Analytic Story

RBA

Risk Score Impact Confidence Message
81.0 90 90 Kubernetes Scanner image pulled on host $host$

:information_source: The Risk Score is calculated by the following formula: Risk Score = (Impact * Confidence/100). Initial Confidence and Impact is set by the analytic author.

Reference

Test Dataset

Replay any dataset to Splunk Enterprise by using our replay.py tool or the UI. Alternatively you can replay a dataset into a Splunk Attack Range

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