Try in Splunk Security Cloud

Description

This is a composed hunting search that looks for possible user enumeration attempts when SAML is enabled on a Splunk instance by capturing different responses from server.

  • Type: Hunting
  • Product: Splunk Enterprise

  • Last Updated: 2024-07-01
  • Author: Rod Soto
  • ID: 2bae5d19-6d1b-4db0-82ab-0af5ac5f836c

Annotations

ATT&CK

ATT&CK

ID Technique Tactic
T1087 Account Discovery Discovery
Kill Chain Phase
  • Exploitation
NIST
  • DE.AE
CIS20
  • CIS 10
CVE
ID Summary CVSS
   
1
2
3
4
5
`splunkd` component=UiAuth status=failure action=login TcpChannelThread 
| stats count min(_time) as firstTime max(_time) as lastTime by user status action clientip 
| `security_content_ctime(firstTime)` 
| `security_content_ctime(lastTime)` 
| `splunk_information_disclosure_on_account_login_filter`

Macros

The SPL above uses the following Macros:

:information_source: splunk_information_disclosure_on_account_login_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.

  • user
  • action
  • status
  • clientip
  • host

How To Implement

Requires access to internal indexes _internal.

Known False Positives

This is a hunting search and requires operator to search for large number of login failures from several users indicating possible user enumeration attempts. May capture genuine login failures.

Associated Analytic Story

RBA

Risk Score Impact Confidence Message
5.0 10 50 Possible user enumeration attack against $clientip$

: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