IMPORTANT: No additional bug fixes or documentation updates will be released for this version. For the latest information, see the current release documentation.

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Crowdstrike module

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Crowdstrike module

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This is the filebeat module for the Crowdstrike Falcon using the Falcon SIEM Connector. This module collects this data, converts it to ECS, and ingests it to view in the SIEM. By default, the Falcon SIEM connector outputs JSON formatted Falcon Streaming API event data.

This module segments events forwarded by the Falcon SIEM connector into two datasets for endpoint data and Falcon platform audit data.

When you run the module, it performs a few tasks under the hood:

Sets the default paths to the log files (but don’t worry, you can override the defaults)
Makes sure each multiline log event gets sent as a single event
Uses ingest node to parse and process the log lines, shaping the data into a structure suitable for visualizing in Kibana
Deploys dashboards for visualizing the log data

Compatibility

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This input supports Crowdstrike Falcon SIEM-Connector-v2.0.

Set up and run the module

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Before doing these steps, verify that Elasticsearch and Kibana are running and that Elasticsearch is ready to receive data from Filebeat.

If you’re running our hosted Elasticsearch Service on Elastic Cloud, or you’ve enabled security in Elasticsearch and Kibana, you need to specify additional connection information before setting up and running the module. See Quick start: modules for common log formats for the complete setup.

To set up and run the module:

Enable the module:

deb and rpm:

filebeat modules enable crowdstrike

mac:

./filebeat modules enable crowdstrike

brew:

filebeat modules enable crowdstrike

linux:

./filebeat modules enable crowdstrike

win:

PS > .\filebeat.exe modules enable crowdstrike

This command enables the module config defined in the modules.d directory. See Enable and run modules for other ways to enable modules.

To see a list of enabled and disabled modules, run:

deb and rpm:

filebeat modules list

mac:

./filebeat modules list

brew:

filebeat modules list

linux:

./filebeat modules list

win:

PS > .\filebeat.exe modules list

Set up the initial environment:

deb and rpm:
```
filebeat setup -e
```
mac:
```
./filebeat setup -e
```
linux:
```
./filebeat setup -e
```
brew:
```
filebeat setup -e
```
win:
```
PS > .\filebeat.exe setup -e
```
The setup command loads the recommended index template for writing to Elasticsearch and deploys the sample dashboards (if available) for visualizing the data in Kibana. This is a one-time setup step.

The -e flag is optional and sends output to standard error instead of syslog.

The ingest pipelines used to parse log lines are set up automatically the first time you run the module, assuming the Elasticsearch output is enabled. If you’re sending events to Logstash, or plan to use Beats central management, also see Load ingest pipelines manually.
Run Filebeat.

If your logs aren’t in the default location, see Configure the module, then run Filebeat after you’ve set the paths variable.

deb and rpm:
```
service filebeat start
```
mac:
```
./filebeat -e
```
brew:
```
filebeat -e
```
linux:
```
./filebeat -e
```
win:
```
PS > Start-Service filebeat
```
If the module is configured correctly, you’ll see INFO Harvester started messages for each file specified in the config.

Depending on how you’ve installed Filebeat, you might see errors related to file ownership or permissions when you try to run Filebeat modules. See Config File Ownership and Permissions in the Beats Platform Reference for more information.
Explore your data in Kibana:
1. Open your browser and navigate to the Dashboard overview in Kibana: http://localhost:5601/app/kibana#/dashboards. Replace localhost with the name of the Kibana host. If you’re using an Elastic Cloud instance, log in to your cloud account, then navigate to the Kibana endpoint in your deployment.
2. If necessary, log in with your Kibana username and password.
3. Enter the module name in the search box, then open a dashboard and explore the visualizations for your parsed logs.
  
  If you don’t see data in Kibana, try changing the date range to a larger range. By default, Kibana shows the last 15 minutes.

Dashboards

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The best way to view Crowdstrike events and alert data is in the SIEM.

For alerts, go to Detections → External alerts.

And for all over event Crowdstrike Falcon event types, go to Host → Events.

Configure the module

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You can further refine the behavior of the crowdstrike module by specifying variable settings in the modules.d/crowdstrike.yml file, or overriding settings at the command line.

Variable settings

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Each fileset has separate variable settings for configuring the behavior of the module. If you don’t specify variable settings, the crowdstrike module uses the defaults.

For more information, see Configure variable settings. Also see Override input settings.

When you specify a setting at the command line, remember to prefix the setting with the module name, for example, crowdstrike.falcon_endpoint.var.paths instead of falcon_endpoint.var.paths.

`falcon` fileset settings

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The fileset is by default configured to collect JSON formated event data from /var/log/crowdstrike/falconhoseclient/output. It forwards DetectionSummaryEvent and IncidentSummaryEvent events.

var:
  - name: paths
    default:
      - /var/log/crowdstrike/falconhoseclient/output

var.paths: An array of glob-based paths that specify where to look for the log files. All patterns supported by Go Glob are also supported here. For example, you can use wildcards to fetch all files from a predefined level of subdirectories: /path/to/log/*/*.log. This fetches all .log files from the subfolders of /path/to/log. It does not fetch log files from the /path/to/log folder itself. If this setting is left empty, Filebeat will choose log paths based on your operating system.

Fields

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For a description of each field in the module, see the exported fields section.

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Crowdstrike module

Crowdstrike module

Compatibility

Set up and run the module

Dashboards

Configure the module

Variable settings

falcon fileset settings

Fields

`falcon` fileset settings