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TA for Zeek

Splunk Cloud
Overview
Details
This add-on parses open-source Zeek data in JSON and TSV formats, and populates it through into the CIM data model. Compatible with the dashboards and visualizations in the Corelight App for Splunk. Previously maintained by Splunk as the "Splunk Add-on for Zeek aka Bro", now maintained by Corelight as part of its ongoing support for the Zeek project.

Welcome to the TA for Zeek documentation!

Overview

About TA for Zeek

Author Corelight, Inc.
App Version 1.0.4
Vendor Products Zeek
Has index-time operations false
Creates an index false
Implements summarization Currently, the app does not generate summaries

About TA for Zeek

The TA for Zeek allows a Splunk Enterprise administrator to parse open source Zeek data in JSON or TSV format, and map it into the Common Information Model for use by multiple Splunk security apps, including the https://splunkbase.splunk.com/app/3884/.

Release Notes

Version 1.0.4

Add FIELDALIASes per field request for improved ES/CIM mapping.

Version 1.0.4

Add FIELDALIASes per field request.

Version 1.0.2

Add several FIELDALIASes for better CIM mapping; add event types for better compatibility with the Corelight App for Splunk.

Version 1.0.1

Minor bug fixes

Version 1.0.0

Transition from the https://splunkbase.splunk.com/app/1617/, which had been unmaintained from late 2018 through early 2021. This update is primarily focused on better support for the Common Information Model, with multiple fields being remapped to more appropriate locations, and others being added for the first time. Additionally, parity of mappings between JSON and TSV format was added, as the two were previously inconsistent.

Known Issues

Version 1.0.2 of TA for Zeek has the following known issues:

  • None

Support and resources

Support

Support is available via email at appsupport@corelight.com. Responses vary on working days between working hours.

Installation and Configuration

Software requirements

Splunk 7.3 or above
Common Information Model 4.x

Migration from Splunk Add-on for Zeek aka Bro

Administrators should uninstall the Splunk Add-on for Zeek aka Bro and then install the TA for Zeek in its place.

Release Notes

Version 1.0.4
Oct. 22, 2021

Add DNS field mappings for improved Enterprise Security/CIM functionality

Version 1.0.3
Oct. 15, 2021

Added new FIELDALIAS values per field request

Version 1.0.2
Aug. 25, 2021

Add several FIELDALIAS items for CIM mapping, as well as event types that make the data render better within the Corelight App for Splunk.

Version 1.0.1
April 2, 2021

Minor bug fixes

Version 1.0.0
March 18, 2021

• Updated “action” field to produce values in line with the Network Traffic data model, including removing the mappings for actions from the notice log.
• Moved several fields from global declarations to local ones based on where the data will actually be present:
◦ attachment_type
◦ bytes
◦ bytes_in
◦ bytes_out
◦ duration
◦ file_name
◦ http_content_type
◦ lease_duration
◦ message_id
◦ method
◦ packets
◦ packets_in
◦ packets_out
◦ record_type
◦ referrer
◦ request_body_len
◦ response_body_len
◦ sender
◦ service
◦ status
◦ transport
◦ url
◦ user_agent
◦ user
• Removed incorrect mappings for “body”, “subject”, “orig_recipient”, and “severity”
• Added mappings for “ssl_issuer_email” and “ssl_issuer_organization”
• Added a value for vendor_action field

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