Flag Risky User Activities
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Flag Risky User Activities

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Various users can be identified in logs for different streams ingested by DNIF. Multiple signals can be raised for a Suspected User, this leads to Suspected User being a Risky User.

It is possible to enrich more data about a risky user by creating an enrichment bucket to find out the top Risky Users and add a tag against the user as being Risky.

Define a custom Enrichment Bucket

You can create a custom enrichment bucket to identify the top risky users and gather additional information on why a particular user is risky.

bucket: User
fields:
- User
schema-version: 1.0
source:
- enr_key: '{$SuspectUser}'
  enr_values:
    annotate:
      UserTag: Risky
    translate:
      $StatUniqueSum: RiskScore
  query: "_fetch * from event where $Stream=SIGNALS AND $Duration=7d group stat_unique $SuspectUser sum $DetectionScore limit 10"
  sourcetype: dql
Field Description
Bucket Enter the name for the enrichment bucket.
Fields Enter the field names to be enriched.
schema-version Enter the schema version
Source List of sources for the enrichment bucket. Note: There can be multiple sources for one enrichment bucket
  • Source Type: Enter the source type i.e. dql/sql/eventstore.
  • Eventstore: For this scenario, enter dql query.
  • Enr_key: Enter the desired values to be detected in the output representation. For example, '{$SuspectUser}'
  • Enr_values
      • Translate: Allows you to replace the column names of the query result. To replace enter : For example, $StatUniqueSum: RiskScore In this case, the column name $StatUniqueSum is replaced with $RiskScore.
  • Run a Search

    To check if enrichment has been added successfully, run a search on data to fetch enriched details. Enrichment will be applied to the field values mentioned in the enrichment bucket of yml file.

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    In the above screen, you can view all the additional information to identify a particular user to be risky.

    From the query result, you can click the Information icon to further drill down to each entity in the result and verify the enriched details.

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