CrowdStrike moduleedit

This is the Filebeat module for 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

Read the quick start to learn how to configure and run modules.

Compatibilityedit

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

Configure the moduleedit

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 settingsedit

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 advanced use cases, you can also override input settings. 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 settingsedit

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.

Dashboardsedit

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

siem alerts cs

For alerts, go to Detections → External alerts.

siem events cs

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

Fieldsedit

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