The following hunting analytic is meant to help organizations understand what remote access software is being used in the environment. When reviewing this hunt, confirm the software identified is authorized to be utilized. Based on fidelity, create a new analytic for specific utilities banned within the organization. Adversaries use these utilities to retain remote access capabilities to the environment. Utilities in the lookup include AnyDesk, GoToMyPC, LogMeIn, TeamViewer and much more. Review the lookup for the entire list and add any others.
- Type: Hunting
- Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
- Datamodel: Endpoint
- Last Updated: 2022-08-22
- Author: Michael Haag, Splunk
- ID: 8bd22c9f-05a2-4db1-b131-29271f28cb0a
Kill Chain Phase
- Command and Control
- CIS 10
1 2 3 4 5 6 7 8 | tstats `security_content_summariesonly` count min(_time) as firstTime max(_time) as lastTime values(Processes.process) as process values(Processes.parent_process) as parent_process from datamodel=Endpoint.Processes where Processes.dest!=unknown Processes.user!=unknown by Processes.dest Processes.user Processes.process_name Processes.process | `security_content_ctime(firstTime)` | `security_content_ctime(lastTime)` | `drop_dm_object_name(Processes)` | lookup remote_access_software remote_utility AS process_name OUTPUT isutility | search isutility = True | `windows_remote_access_software_hunt_filter`
The SPL above uses the following Macros:
windows_remote_access_software_hunt_filter is a empty macro by default. It allows the user to filter out any results (false positives) without editing the SPL.
The SPL above uses the following Lookups:
List of fields required to use this analytic.
How To Implement
The detection is based on data that originates from Endpoint Detection and Response (EDR) agents. These agents are designed to provide security-related telemetry from the endpoints where the agent is installed. To implement this search, you must ingest logs that contain the process GUID, process name, and parent process. Additionally, you must ingest complete command-line executions. These logs must be processed using the appropriate Splunk Technology Add-ons that are specific to the EDR product. The logs must also be mapped to the
Processes node of the
Endpoint data model. Use the Splunk Common Information Model (CIM) to normalize the field names and speed up the data modeling process.
Known False Positives
False positives will be found. Filter as needed and create higher fidelity analytics based off banned remote access software.
Associated Analytic Story
|1.0||10||10||The following Remote Access Software $process_name$ was identified on $dest$.|
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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