Try in Splunk Security Cloud

Description

The following is a hunting search that allows investigation of error messages indicating Splunk HTTP engine shutdown as a result of a crafted posted request against '/datamodel/model' endpoint.

  • Type: Hunting

  • Product: Splunk Enterprise

  • Last Updated: 2024-07-01
  • Author: Rod Soto
  • ID: 45766810-dbb2-44d4-b889-b4ba3ee0d1f5

Annotations

ATT&CK

ATT&CK

ID Technique Tactic
T1499 Endpoint Denial of Service Impact
Kill Chain Phase
  • Actions On Objectives
NIST
  • DE.AE
CIS20
  • CIS 10
CVE
ID Summary CVSS
    


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`splunkd_webs` log_level=INFO message="ENGINE: HTTP Server cherrypy._cpwsgi_server.CPWSGIServer(('127.0.0.1', 8065)) shut down"  
| stats count min(_time) as firstTime max(_time) as lastTime by splunk_server message  
| `security_content_ctime(firstTime)` 
| `security_content_ctime(lastTime)` 
| `splunk_dos_via_post_request_datamodel_endpoint_filter`

Macros

The SPL above uses the following Macros:

:information_source: splunk_dos_via_post_request_datamodel_endpoint_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.

  • UPDATE

How To Implement

Need access to the internal indexes.

Known False Positives

This is a hunting search and will produce false positives as other causes can also shut down splunk HTTP engine, however this denial of service error is associated to a request to the datamodel/model endpoing which operator can research and find proximity of request and message in logs.

Associated Analytic Story

RBA

Risk Score Impact Confidence Message
50.0 100 50 Possible Denial of Service attack against $splunk_server$

: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

source | version: 1