Risk Level: Low
Cloud Entity: CloudTrail
CloudGuard Rule ID: D9.AWS.MON.09
Covered by Spectral: Yes
Category: Management Tools

GSL LOGIC

List<CloudTrail> should have items with [hasSNSSubscriber='true' and metricFilters with [filterPattern isFilterPatternEqual(`{($.eventSource = config.amazonaws.com) && (($.eventName=StopConfigurationRecorder)||($.eventName=DeleteDeliveryChannel)||($.eventName=PutDeliveryChannel)||($.eventName=PutConfigurationRecorder))}`)] length() > 0]

REMEDIATION

From Portal
Perform the following steps to setup the metric filter, alarm, SNS topic, and subscription:

Create a metric filter based on filter pattern relevant for this check. For More details, refer to CIS Amazon Web Services Foundations Benchmark v1.5.0: https://workbench.cisecurity.org/benchmarks/7366
Create an SNS topic that the alarm will notify
Create an SNS subscription to the topic created in step 2
Create an alarm that is associated with the CloudWatch Logs Metric Filter created in step 1 and an SNS topic created in step 2

From Command Line
Perform the following to setup the metric filter, alarm, SNS topic, and subscription:

Create a metric filter based on filter pattern provided and CloudWatch log group.

aws logs put-metric-filter --log-group-name cloudtrail_log_group_name --filter-name aws_config_changes_metric --metric-transformations metricName= aws_config_changes_metric ,metricNamespace=METRIC_NAMESPACE,metricValue=1 --filter-pattern '{ ($.eventSource = config.amazonaws.com) && (($.eventName=StopConfigurationRecorder)||($.eventName=DeleteDeliveryChannel)||($.eventName=PutDeliveryChannel)||($.eventName=PutConfigurationRecorder)) }'

Note: You can choose your own metricName and metricNamespace strings. Using the same metricNamespace for all Foundations Benchmark metrics will group them together.

Create an SNS topic that the alarm will notify.

aws sns create-topic --name sns_topic_name

Note: you can execute this command once and then re-use the same topic for all monitoring alarms.

Create an SNS subscription to the topic created in step 2.

aws sns subscribe --topic-arn sns_topic_arn --protocol protocol_for_sns --notification-endpoint sns_subscription_endpoints

Note: you can execute this command once and then re-use the SNS subscription for all.

Create an alarm that is associated with the CloudWatch Logs Metric Filter created in step 1 and an SNS topic created in step 2.

aws cloudwatch put-metric-alarm --alarm-name aws_config_changes_alarm --metric-name aws_config_changes_metric --statistic Sum --period 300 --threshold 1 --comparison-operator GreaterThanOrEqualToThreshold --evaluation-periods 1 --namespace METRIC_NAMESPACE --alarm-actions sns_topic_arn

References

CloudTrail

AWS CloudTrail is a service that enables governance, compliance, operational auditing, and risk auditing of your AWS account. With CloudTrail, you can log, continuously monitor, and retain account activity related to actions across your AWS infrastructure. CloudTrail provides event history of your AWS account activity, including actions taken through the AWS Management Console, AWS SDKs, command line tools, and other AWS services. This event history simplifies security analysis, resource change tracking, and troubleshooting.

Compliance Frameworks

AWS CIS Controls V 8
AWS CIS Foundations v. 1.0.0
AWS CIS Foundations v. 1.1.0
AWS CIS Foundations v. 1.2.0
AWS CIS Foundations v. 1.3.0
AWS CIS Foundations v. 1.4.0
AWS CIS Foundations v. 1.5.0
AWS CIS Foundations v. 2.0.0
AWS CSA CCM v.3.0.1
AWS CSA CCM v.4.0.1
AWS CloudGuard Best Practices
AWS CloudGuard SOC2 based on AICPA TSC 2017
AWS CloudGuard Well Architected Framework
AWS GDPR Readiness
AWS HIPAA
AWS HITRUST
AWS HITRUST v11.0.0
AWS ISO 27001:2013
AWS ISO27001:2022
AWS ITSG-33
AWS LGPD regulation
AWS MAS TRM Framework
AWS MITRE ATT&CK Framework v10
AWS MITRE ATT&CK Framework v11.3
AWS NIST 800-171
AWS NIST 800-53 Rev 4
AWS NIST 800-53 Rev 5
AWS NIST CSF v1.1
AWS PCI-DSS 3.2
AWS PCI-DSS 4.0
CloudGuard AWS All Rules Ruleset