Splunk® App for PCI Compliance

Installation and Configuration Manual

Primary Functions

This report looks at cardholder systems that have multiple primary functions active. The data in the Primary Functions report is generated from a lookup file (assets.csv) populated by the user. This report looks at process data, service data, and port/protocol data to determine what functions are running on a system and displays them in the result. Use this report to identify systems where multiple primary functions might be running or where unexpected services could be in use.

Systems within the PCI cardholder environment should be implemented with only a single primary function to prevent functions that require different security levels from coexisting on the same server. The PCI requirement ensures that your system configuration standards and related processes minimize the potential for introducing security weaknesses to the system.

Relevant data sources

Relevant data sources for this report include service, process, and port data such as the Splunk Add-on for Unix and Linux or the Splunk Add-on for Microsoft Windows.

How to configure this report

  1. Index process, service, and/or port data in Splunk platform.
  2. Map the data to the following Common Information Model fields. Map services fields to dest, StartMode. Map process fields to dest, process. Map port fields: dest,dest_port,transport. CIM-compliant add-ons for these data sources perform this step for you.
  3. Configure the Primary Functions list with the functions desired.

Report description

The data in the Primary Functions report is populated by three lookups. One lookup is generated by the Endpoint - Local Processes - Lookup Gen saved search, a second by the Endpoint - Services Tracker - Lookup Gen saved search, and the third by the Endpoint - Listening Ports Tracker- Lookup Gen saved search. The localprocesses_tracker, services_tracker macros correlate process data with the asset and identity tables to pull in additional information.

This report includes three searches: Endpoint - Local Processes - Lookup Gen, Endpoint - Services Tracker - Lookup Gen, and Endpoint - Listening Ports Tracker- Lookup Gen.

Review each lookup generating search to learn more about the search schedule and time range.

The primary functions list can be found at Configure > Content Management and clicking the Primary Functions lookup. The primary functions CSV can be found at $SPLUNK_HOME/etc/apps/SA-EndpointProtection/lookups/primary_functions.csv.

Useful searches for troubleshooting

Troubleshooting Task Search/Action Expected Result
Verify that service, process, and/or port information has been indexed. sourcetype=<expected_st> Returns data from your expected source type.
Verify that the service data has been normalized at search time correctly. Windows: sourcetype="*Services" | table dest, StartMode
or Nix: sourcetype="Unix:Service" | table dest, start_mode
Returns a table of service data.
Verify that the process data has been normalized at search time correctly. sourcetype="*:LocalProcess" | table dest, process Returns a table of process data.
Verify that the port data has been normalized at search time correctly. tag=listening tag=port | table dest,dest_port,transport
or `listeningports` | table dest,dest_port,transport
Returns a table of port data.
Verify that the service tracker file is getting created correctly. | inputlookup append=T services_tracker
or | `services_tracker`
Returns data in the services tracker file.
Verify that the process tracker file is getting created correctly. | inputlookup append=T localprocesses_tracker
or | `localprocesses_tracker`
Returns data in the process tracker file.
Verify that the port tracker file is getting created correctly. | inputlookup append=T listeningports_tracker
or | `listeningports_tracker`
Returns data in the port tracker file.
Verify that the primary functions tracker is created correctly. `primary_functions_tracker` Returns data in the primary functions tracker.

Additional information

This report uses default source types that ship with the Splunk add-on for Windows and the Splunk add-on for *nix.

Tracker files for this report are located:

  • $SPLUNK_HOME/etc/apps/SA-EndpointProtection/lookups/listeningports_tracker.csv
  • $SPLUNK_HOME/etc/apps/SA-EndpointProtection/lookups/services_tracker.csv
  • $SPLUNK_HOME/etc/apps/SA-EndpointProtection/lookups/localprocesses_tracker.csv
Last modified on 14 February, 2022
PCI System Inventory   Prohibited Services

This documentation applies to the following versions of Splunk® App for PCI Compliance: 5.0.1, 5.0.2, 5.1.0, 5.1.1, 5.1.2, 5.2.0, 5.3.0, 5.3.1, 5.3.2

Was this topic useful?

You must be logged into splunk.com in order to post comments. Log in now.

Please try to keep this discussion focused on the content covered in this documentation topic. If you have a more general question about Splunk functionality or are experiencing a difficulty with Splunk, consider posting a question to Splunkbase Answers.

0 out of 1000 Characters