GitHub Repo

Detection: Splunk Information Disclosure on Account Login

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.

Updated Date: 2026-06-24 ID: 2bae5d19-6d1b-4db0-82ab-0af5ac5f836c Author: Rod Soto Type: Hunting Product: Splunk Enterprise Security

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.

1`splunkd` component=UiAuth status=failure action=login TcpChannelThread 
2| stats count min(_time) as firstTime max(_time) as lastTime by user status action clientip 
3| `security_content_ctime(firstTime)` 
4| `security_content_ctime(lastTime)` 
5| `splunk_information_disclosure_on_account_login_filter`

Data Source

Name Platform Sourcetype Source
Splunk Splunk icon Splunk 'splunkd_ui_access' 'splunkd_ui_access.log'

Macros Used

Name Value
splunkd index=_internal sourcetype=splunkd
splunk_information_disclosure_on_account_login_filter search *
splunk_information_disclosure_on_account_login_filter is an empty macro by default. It allows the user to filter out any results (false positives) without editing the SPL.

Annotations

- MITRE ATT&CK
+ Kill Chain Phases
+ NIST
+ CIS
- Threat Actors
ID Technique Tactic
T1087 Account Discovery Discovery
Exploitation
DE.AE
CIS 10

CVE

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 Finding (Notable) No
Creates Intermediate Finding (Risk Event) No
Hunting detections do not generate a Finding (Notable) or Intermediate Findings (Risk Events).

Implementation

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

References

Detection Testing

Test Type Status Dataset Source Sourcetype
Validation Not Applicable N/A N/A N/A
Unit ✅ Passing Dataset /opt/splunk/var/log/splunk/splunkd.log splunkd

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: 8