new-rule-mfa-disabled-for-google-workspace-organization (#553)

2020-11-18 09:05:07 -07:00
parent 6aca322cfd
commit 78b8d5c761
1 changed files with 42 additions and 0 deletions
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+[metadata]
+creation_date = "2020/11/17"
+ecs_version = ["1.6.0"]
+maturity = "production"
+updated_date = "2020/11/17"
+
+[rule]
+author = ["Elastic"]
+description = """
+Detects when multi-factor authentication (MFA) is disabled for a Google Workspace organization. An adversary may attempt
+to modify a password policy in order to weaken an organization’s security controls.
+"""
+false_positives = [
+    """
+    MFA settings may be modified by system administrators. Verify that the configuration change was expected. Exceptions
+    can be added to this rule to filter expected behavior.
+    """,
+]
+from = "now-130m"
+index = ["filebeat-*"]
+interval = "10m"
+language = "kuery"
+license = "Elastic License"
+name = "MFA Disabled for Google Workspace Organization"
+note = """### 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/current/filebeat-module-gsuite.html"""
+risk_score = 47
+rule_id = "e555105c-ba6d-481f-82bb-9b633e7b4827"
+severity = "medium"
+tags = ["Elastic", "Cloud", "Google Workspace", "Continuous Monitoring", "SecOps", "Identity and Access"]
+type = "query"
+
+query = '''
+event.dataset:gsuite.admin and event.provider:admin and event.category:iam and event.action:(ENFORCE_STRONG_AUTHENTICATION or ALLOW_STRONG_AUTHENTICATION) and gsuite.admin.new_value:false
+'''
+