ID | Technique | Tactic |
---|
Detection: Kubernetes Azure detect suspicious kubectl calls
DEPRECATED DETECTION
This detection has been marked as deprecated by the Splunk Threat Research team. This means that it will no longer be maintained or supported. If you have any questions or concerns, please reach out to us at research@splunk.com.
Description
This search provides information on rare Kubectl calls with IP, verb namespace and object access context
Search
1`kubernetes_azure` category=kube-audit
2| spath input=properties.log
3| spath input=responseObject.metadata.annotations.kubectl.kubernetes.io/last-applied-configuration
4| search userAgent=kubectl* sourceIPs{}!=127.0.0.1 sourceIPs{}!=::1
5| table sourceIPs{} verb userAgent user.groups{} objectRef.resource objectRef.namespace requestURI
6| rare sourceIPs{} verb userAgent user.groups{} objectRef.resource objectRef.namespace requestURI
7|`kubernetes_azure_detect_suspicious_kubectl_calls_filter`
Data Source
Name | Platform | Sourcetype | Source | Supported App |
---|---|---|---|---|
N/A | N/A | N/A | N/A | N/A |
Macros Used
Name | Value |
---|---|
kubernetes_azure | sourcetype=mscs:storage:blob:json |
kubernetes_azure_detect_suspicious_kubectl_calls_filter | search * |
kubernetes_azure_detect_suspicious_kubectl_calls_filter
is an empty macro by default. It allows the user to filter out any results (false positives) without editing the SPL.
Annotations
Default Configuration
This detection is configured by default in Splunk Enterprise Security to run with the following settings:
Setting | Value |
---|---|
Disabled | true |
Cron Schedule | 0 * * * * |
Earliest Time | -70m@m |
Latest Time | -10m@m |
Schedule Window | auto |
Creates Risk Event | False |
Implementation
You must install the Add-on for Microsoft Cloud Services and Configure Kube-Audit data diagnostics
Known False Positives
Kubectl calls are not malicious by nature. However source IP, verb and Object can reveal potential malicious activity, specially suspicious IPs and sensitive objects such as configmaps or secrets
Associated Analytic Story
Risk Based Analytics (RBA)
Risk Message | Risk Score | Impact | Confidence |
---|---|---|---|
tbd | 25 | 50 | 50 |
Detection Testing
Test Type | Status | Dataset | Source | Sourcetype |
---|---|---|---|---|
Validation | Not Applicable | N/A | N/A | N/A |
Unit | ❌ Failing | N/A | N/A |
N/A |
Integration | ❌ Failing | N/A | N/A |
N/A |
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
Source: GitHub | Version: 2