Try in Splunk Security Cloud

Description

The following hunting search provides information on splunkd crash as a result of a Denial of Service Exploitation via null pointer references which targets 'services/cluster/config' endpoint.

  • Type: Hunting
  • Product: Splunk Enterprise

  • Last Updated: 2024-07-01
  • Author: Rod Soto
  • ID: d67594fe-c317-41b8-9319-ec8428d5c2ea

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
   
1
2
3
4
5
`splunk_crash_log` "Segmentation fault" "POST /services/cluster/config" 
| stats count min(_time) as firstTime max(_time) as  lastTime by host 
| `security_content_ctime(firstTime)` 
| `security_content_ctime(lastTime)` 
| `splunk_unauthenticated_dos_via_null_pointer_references_filter`

Macros

The SPL above uses the following Macros:

:information_source: splunk_unauthenticated_dos_via_null_pointer_references_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.

  • sourcetype

How To Implement

Requires access to internal indexes.

Known False Positives

This is a hunting search and will produce false positives. An operator needs to find proximity and detail of requests targeting cluster config endpoint and subsequent Segmentation fault in splunk crash log.

Associated Analytic Story

RBA

Risk Score Impact Confidence Message
50.0 100 50 Possible exploitation attack against $host$

: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

source | version: 1