The following analytic identifies the Microsoft Software Licensing User Interface Tool,
slui.exe, elevating access using the
-verb runas function. This particular bypass utilizes a registry key/value. Identified by two sources, the registry keys are
HKCU\Software\Classes\launcher.Systemsettings\Shell\open\command. To simulate this behavior, multiple POC are available. The analytic identifies the use of
- Type: TTP
- Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
- Datamodel: Endpoint
- Last Updated: 2021-05-13
- Author: Michael Haag, Splunk
- ID: 8d124810-b3e4-11eb-96c7-acde48001122
Kill Chain Phase
1 2 3 4 5 6 | tstats `security_content_summariesonly` count min(_time) as firstTime max(_time) as lastTime from datamodel=Endpoint.Processes where Processes.process_name=slui.exe (Processes.process=*-verb* Processes.process=*runas*) by Processes.dest Processes.user Processes.parent_process Processes.process_name Processes.process Processes.process_id Processes.parent_process_id | `drop_dm_object_name(Processes)` | `security_content_ctime(firstTime)` | `security_content_ctime(lastTime)` | `slui_runas_elevated_filter`
The SPL above uses the following Macros:
slui_runas_elevated_filter is a empty macro by default. It allows the user to filter out any results (false positives) without editing the SPL.
Supported Add-on (TA)
List of Splunk Add-on’s tested to work with the analytic.
List of fields required to use this analytic.
How To Implement
To successfully implement this search you need to be ingesting information on process that include the name of the process responsible for the changes from your endpoints into the
Endpoint datamodel in the
Known False Positives
Limited false positives should be present as this is not commonly used by legitimate applications.
Associated Analytic Story
|63.0||70||90||A slui process $process_name$ with elevated commandline $process$ in host $dest$|
The Risk Score is calculated by the following formula: Risk Score = (Impact * Confidence/100). Initial Confidence and Impact is set by the analytic author.
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