Google Workspace Password Policy Modified

Detects when a Google Workspace password policy is modified. An adversary may attempt to modify a password policy in order to weaken an organization’s security controls.

Rule type: query

Rule indices:

filebeat-*
logs-google_workspace*

Severity: medium

Risk score: 47

Runs every: 10m

Searches indices from: now-130m (Date Math format, see also Additional look-back time)

Maximum alerts per execution: 100

References: None

Tags:

Elastic
Cloud
Google Workspace
Continuous Monitoring
SecOps
Identity and Access

Version: 5

Rule authors:

Elastic

Rule license: Elastic License v2

Investigation guide

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## Config

The Google Workspace Fleet integration, Filebeat module, or similarly structured data is required to be compatible with this rule.

### Important Information Regarding Google Workspace Event Lag Times
- As per Google's documentation, Google Workspace administrators may observe lag times ranging from minutes up to 3 days between the time of an event's occurrence and the event being visible in the Google Workspace admin/audit logs.
- This rule is configured to run every 10 minutes with a lookback time of 130 minutes.
- To reduce the risk of false negatives, consider reducing the interval that the Google Workspace (formerly G Suite) Filebeat module polls Google's reporting API for new events.
- By default, `var.interval` is set to 2 hours (2h). Consider changing this interval to a lower value, such as 10 minutes (10m).
- See the following references for further information.
  - https://support.google.com/a/answer/7061566
  - https://www.elastic.co/guide/en/beats/filebeat/8.16/filebeat-module-google_workspace.html

Rule query

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event.dataset:(gsuite.admin or google_workspace.admin) and
  event.provider:admin and event.category:iam and
  event.action:(CHANGE_APPLICATION_SETTING or CREATE_APPLICATION_SETTING) and
  gsuite.admin.setting.name:(
    "Password Management - Enforce strong password" or
    "Password Management - Password reset frequency" or
    "Password Management - Enable password reuse" or
    "Password Management - Enforce password policy at next login" or
    "Password Management - Minimum password length" or
    "Password Management - Maximum password length"
  ) or
  google_workspace.admin.setting.name:(
    "Password Management - Enforce strong password" or
    "Password Management - Password reset frequency" or
    "Password Management - Enable password reuse" or
    "Password Management - Enforce password policy at next login" or
    "Password Management - Minimum password length" or
    "Password Management - Maximum password length"
  )

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