Enriching Telemetry Events
After you have parsed and normalized the raw security telemetry events, the next step is to enrich the data elements of the normalized event.
Enrichments add external data from data stores (such as HBase). Hortonworks Cybersecurity Platform (HCP) uses a combination of HBase, Storm, and the telemetry messages in json format to enrich the data in real time to make it relevant and consumable. For example, the GEO enrichment provide lattitude and longitude coordinates plus the city, state, and country for an external IP address. You can use this enriched information immediately rather than needing to hunt in different silos for the relevant information.
HCP supports two types of configurations: global and sensor specific. The sensor specific configuration configures the individual enrichments and threat intelligence enrichments for a given sensor type (for example, squid). This section describes sensor specific configurations.
HCP provides two types of enrichment:
- Telemetry events
- Threat intelligence information
The telemetry data sources for which HCP includes parsers (for example, Bro, Snort, and YAF) already include enrichment topologies that activate when you start the data sources in HCP:, but you can add your own enrichment sources to suit your needs:
One of the advantages of the enrichment topology is that it groups messages by HBase key. Whenever you execute a Stellar function, you can add a caching layer, thus decreasing the need to call HBase for every event.
Prior to enabling an enrichment capability within HCP, the enrichment store (which for HCP is primarily HBase) must be loaded with enrichment data. The dataload utilities convert raw data sources to a primitive key (type, indicator) and value and place it in HBase. You can load enrichment data from the local file system or HDFS, or you can use the parser framework to stream data into the enrichment store. The enrichment loader transforms the enrichment into a JSON format that Apache Metron can use. Additionally, the loading framework can detect and remove old data from the enrichment store automatically.
HCP supports three types of enrichment loaders:
- Bulk load from HDFS via MapReduce
- Taxii Loader
- Flat File ingestion
After you load the stores, you can incorporate into the enrichment topology an enrichment bolt to a specific field or tag within a Metron message. The bolt can detect when it can enrich a field and then take an enrichment from the enrichment store and tag the message with it. The enrichment is then stored within the bolt's in-memory cache. HCP uses the underlying Storm routing capabilities to ensure that similar enrichment values are sent to the appropriate bolts that already have these values cached in-memory.