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CEF (Common Event Format) Extraction Add-on for Splunk Enterprise

This add-on provides transforms for CEF headers and key/values extraction and 'cefkv' command for extractling custom strings (useful for dealing with Arcsight logs)

CEFUtils - Common Event Format Extraction Utilities Add-on for Splunk Enterprise

The common event format is an event exchange syntax. A sample message formatted as CEF looks as follows:
CEF:0|Splunk|Test|1.0|signature:2|Test event|5|src_addr= dest_addr= src_port=32122 dest_port=80
It consists of a common prefix that always has to be present, followed by a flexible key-value extension.

In order to parse CEF data correctly in Splunk, this add-on provides 2 transforms:

  • cefHeaders - use it to extract CEF headers
  • cefKeys - fixes multiword value extraction (by default Splunk would only extract key's values up to the first whitespace character)

This add-on also provides a cefkv command, that should be used for extracting custom keys/value pairs from CEF data - usefull if you are dealing with Arcsight events.

CEF:0|Splunk|Test|1.0|signature:2|Test event|5|cs1=custom string value cs1Label=custom label

cefkv will extract following key/value pair from the sample message above: custom_label="custom string value"

Installation in the Distributed Deployment

The add-on provides configurations that are used both at index time and at search time, so if you are installing the add-on in the distributed deployment you'll need to install it on the instances running the Parsing Pipeline (Heavy Forwarders or Indexers/Peers) and on the Search Heads.

See props.conf example supplied with the app

This add-on is partially based on "Common Event Format - Field Extractions" by raffy and "jsonutils" by vbumgarner

Release Notes

Version 1.2.4
Dec. 22, 2015

* Fixed timestamp extraction (thanks to EhudB for bringing the bug to my attention)

Version 1.2.3
Nov. 8, 2012

* Fixed typo in props.conf


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