ID | Technique | Tactic |
---|---|---|
T1189 | Drive-by Compromise | Initial Access |
Detection: Splunk Persistent XSS via Props Conf
Description
In Splunk Enterprise versions below 9.2.3 and 9.1.6 and Splunk Cloud Platform versions below 9.2.2403.108 and 9.1.2312.205, a low-privileged user that does not hold the “admin” or “power” Splunk roles could craft a malicious payload through entity.details in props.conf that could result in execution of unauthorized JavaScript code in the browser of a user.
Search
1`splunkd_ui` status=201 uri_path="*/splunkd/__raw/servicesNS/*/*/configs/*"
2
3| stats count min(_time) as firstTime max(_time) as lastTime by host clientip user uri status
4
5| `security_content_ctime(firstTime)`
6
7| `security_content_ctime(lastTime)`
8
9| `splunk_persistent_xss_via_props_conf_filter`
Data Source
Name | Platform | Sourcetype | Source |
---|---|---|---|
Splunk | Splunk | 'splunkd_ui_access' |
'splunkd_ui_access.log' |
Macros Used
Name | Value |
---|---|
security_content_ctime | convert timeformat="%Y-%m-%dT%H:%M:%S" ctime($field$) |
splunk_persistent_xss_via_props_conf_filter | search * |
splunk_persistent_xss_via_props_conf_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
Requires access to internal index and web component enabled.
Known False Positives
This is a hunting search that provides information on the creation of a scheduled view against the targeted endpoint("/splunkd/__raw/servicesNS/user/search/configs/"). In the attack flow the payload is saved via scheduled view then sent to the victim.
Associated Analytic Story
Risk Based Analytics (RBA)
Risk Message | Risk Score | Impact | Confidence |
---|---|---|---|
Potential XSS attack against $host$ | 1 | 10 | 10 |
References
Detection Testing
Test Type | Status | Dataset | Source | Sourcetype |
---|---|---|---|---|
Validation | ✅ Passing | N/A | N/A | N/A |
Unit | ✅ Passing | N/A | N/A |
N/A |
Integration | ✅ Passing | 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: 1