Domain added to Google Workspace allowlisted domains

gsuite

Classification:

attack

Tactic:

TA0005-defense-evasion

Technique:

T1562-disable-or-modify-tools

Set up the gsuite integration.

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Goal

Detect when a domain is added to Google Workspace’s allowlisted domains.

Strategy

This rule monitors Google Workspace logs to determine when a domain was added to Google Workspace’s allowlisted domains. An attacker may add a trusted domain to reduce the level of security controls to allow for the exfiltration or collection of data.

Triage and response

  1. Reach out to the user or owner of the service account to determine if this action is legitimate.
  2. If the action is legitimate, consider including the user in a suppression list. See Best practices for creating detection rules with Datadog Cloud SIEM for more information.
  3. Otherwise, use the Cloud SIEM - User Investigation dashboard to see if the user: {{@usr.email}} has taken other actions.
  4. If the results of the triage indicate that an attacker has taken the action, begin your company’s incident response process and an investigation.