Create a Cloud SIEM Detection Rule

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Overview

Datadog Cloud SIEM (Security Information and Event Management) unifies developer, operation, and security teams through one platform. Datadog provides a set of out-of-the-box detection rules for many features and integrations. View these rules in your SIEM Detection Rules list.

Create an out-of-the-box detection rule to help users find security insights through your Datadog integration. This guide provides steps for creating an Cloud SIEM detection rule and best practices to follow during the creation process.

To create a Datadog integration, see Create a New Integration.

Create a detection rule

Build a detection rule JSON schema

  1. From Detection Rules, create a new rule.

  2. Follow the best practices in this guide to configure your detection rule.

  3. Click Export to JSON.

  4. Save the JSON file and name it according to your detection rule title. For example, your_integration_name_rule_name.json.

  5. In the detection rule JSON file, add and fill out the partnerRuleId, and remove the isEnabled attribute. For more information, see Configuration best practices.

Open a pull request

  1. Save the detection rule JSON file to your integration’s assets/security folder.

  2. Open a pull request (PR) to update the corresponding integration folder in either the integrations-extras GitHub repository or Marketplace Github repository. The PR should include your detection rule JSON file, along with any new integration files.

  3. Datadog approves and merges the PR, and your integration-recommended monitor is pushed to production.

Verify your detection rule in production

To see the out-of-the-box detection rule, the relevant integration tile must be Installed in Datadog, and Cloud SIEM must be enabled.

  1. Find your detection rule in the Detection Rules list, and expand it.
  2. Ensure that its logos render correctly.
  3. Verify that the rule is enabled.

Configuration best practices

In addition to the detection rule definition, the partnerRuleId field is required for partner contributed detection rules. The isEnabled field should be removed as it does not apply to partner contributed detection rules.

DescriptionExamples
partnerRuleIdUnique identifier for the rule, following the format ext-00*-*** where * could be any alphanumeric characters.ext-003-bzd

Example of a well-defined detection rule

Selecting a rule type and defining search queries:

Steps 1-3 of a filled-out detection rule creation form

Setting rule cases and writing the notification message:

Steps 4 and 5 of a filled-out detection rule creation form

For more information, see the documentation on configuring a detection rule.

Understanding validation messages

Rule JSON parsing

File=<FILE_PATH> in collection=<COLLECTION> is an invalid JSON: error=<ERROR>

This error means that the JSON located at <FILE_PATH> is considered invalid JSON

Rule ID/Rule name

partnerRuleId is empty for rule name="<RULE_NAME>" - partnerRuleId=<NEW_RULE_ID> is available

A partnerRuleId is required for each rule and is missing. Use the generated <NEW_RULE_ID>.

partnerRuleId=<RULE_ID> is in the incorrect format for rule name="<RULE_NAME>", it must follow the format=^[a-z0-9]{3}-[a-z0-9]{3}-[a-z0-9]{3}$ - partnerRuleId=<NEW_RULE_ID> is available

The rule name is not in the correct format. Use the generated partnerRuleId: <NEW_RULE_ID> to fix the issue.

Duplicate partnerRuleId=<RULE_ID> for rule name="<RULE_NAME>" - <RULE_ID_KEY> must be unique and it is already used in rule_ids="<RULE_IDS>" - <RULE_ID_KEY>=<NEW_RULE_ID> is available

Each partnerRuleId must be unique. The current ID is already being used. The newly generated partnerRuleId is available.

Duplicate name="<RULE_NAME>" for <RULE_ID_KEY>=<RULE_ID> - name must be unique.

Each rule name must be unique. The current name is already being used. Update the rule name to be unique.

MITRE tags

The rule with partnerRuleId=<RULE_ID> contains a MITRE tag tactic but it does not contain the tag `security:attack`, please add it

When a rule contains a MITRE tag tactic:<TAG_VALUE>, the tag security:attack must be added to the list of tags.

The MITRE tactic/technique tag=<TAG> for partnerRuleId=<RULE_ID> appears to be incorrect (i.e. it does not exist in the MITRE framework).

The listed tactic/technique tag <TAG> does not follow the MITRE framework. Please select a valid MITRE tag.

Cases

The case status <CASE_STATUS> for <RULE_ID_KEY>=<RULE_ID> is incorrect, it should be one of <STATUS_LIST>.

The case status must be either CRITICAL, HIGH, MEDIUM, LOW, or INFO.

The case ordering for partnerRuleId=<RULE_ID> is incorrect, please modify to order cases from the highest severity to the lowest.

Each rule definition must be ordered by decreasing severity. Please reorder the cases into CRITICAL, HIGH, MEDIUM, LOW, and INFO.

Source tags

source=<SOURCE> in the tags of the rule with partnerRule=<RULE_ID> is not supported by Datadog documentation.

Reach out to Datadog to address the issue.

Rule content validation/ rule update

<RULE_ID_KEY>=<RULE_ID> name="<RULE_NAME>" - error=<ERROR>

Reach out to Datadog to address the issue.

Internal failure for <RULE_ID_KEY>=<RULE_ID> name="<RULE_NAME>"- Contact Datadog Team

Reach out to Datadog to address the issue.

Further reading

お役に立つドキュメント、リンクや記事:

Log Detection RulesDOCUMENTATION more more