Project: KICS (Provisioning / Security & Compliance)
File: 0f6cbf69-41bb-47dc-93f3-3844640bf480.md

title: Cloudwatch Cloudtrail Configuration Changes Alarm Missing hide: toc: true navigation: true <style> .highlight .hll { background-color: #ff171742; } .md-content { max-width: 1100px; margin: 0 auto; } </style> Query id: 0f6cbf69-41bb-47dc-93f3-3844640bf480 Query name: Cloudwatch Cloudtrail Configuration Changes Alarm Missing Platform: Terraform Severity: <span style="color:#ff7213">Medium</span> Category: Observability URL: Ensure a log metric filter and alarm exist for CloudTrail configuration changes<br> ```tf title="Positive test num. 1 - tf file" hl_lines="1" resource "awscloudwatchlogmetricfilter" "ciscloudtrailconfigchangemetric_filter" { name = "CIS-CloudTrailChanges" pattern = "{ ($.eventName = CreateTrail) || ($.eventName = UpdateTrail) || ($.eventName = DeleteTrail) || ($.eventName = StartLogging) || ($.eventName = StopLogging) }" loggroupname = awscloudwatchloggroup.CISCloudWatch_LogsGroup.name metric_transformation { name = "CIS-CloudTrailChanges" namespace = "CISMetricAlarm_Namespace" value = "1" } } resource "awscloudwatchmetricalarm" "ciscloudtrailconfigchangecwalarm" { alarm_name = "CIS-3.5-CloudTrailChanges" comparison_operator = "GreaterThanOrEqualToThreshold" evaluation_periods = "1" metric_name = "XXXX NOT YOUR FILTER XXXX" namespace = "CISMetricAlarm_Namespace" period = "300" statistic = "Sum" threshold = "1" alarm_description = "Monitoring changes to CloudTrail's configuration will help ensure sustained visibility to activities performed in the AWS account." alarmactions = [awssnstopic.CISAlertsSNSTopic.arn] insufficientdataactions = [] } ``` ```tf title="Positive test num. 2 - tf file" hl_lines="1" resource "awscloudwatchlogmetricfilter" "cisunauthorizedapicallsmetric_filter" { name = "CIS-UnauthorizedAPICalls" pattern = "{ ($.errorCode = \"UnauthorizedOperation\") || ($.errorCode = \"AccessDenied\") }" loggroupname = awscloudwatchloggroup.CISCloudWatch_LogsGroup.name metric_transformation { name = "CIS-UnauthorizedAPICalls" namespace = "CISMetricAlarm_Namespace" value = "1" } } resource "awscloudwatchmetricalarm" "cisunauthorizedapicallscwalarm" { alarm_name = "CIS-3.1-UnauthorizedAPICalls" comparison_operator = "GreaterThanOrEqualToThreshold" evaluation_periods = "1" metricname = awscloudwatchlogmetricfilter.cisunauthorizedapicallsmetricfilter.id namespace = "CISMetricAlarm_Namespace" period = "300" statistic = "Sum" threshold = "1" alarm_description = "Monitoring unauthorized API calls will help reveal application errors and may reduce time to detect malicious activity." alarmactions = [awssnstopic.cisalertssnstopic.arn] insufficientdataactions = [] } ``` ```tf title="Positive test num. 3 - tf file" hl_lines="1" resource "awscloudwatchlogmetricfilter" "ciscloudtrailconfigchangemetric_filter" { name = "CIS-CloudTrailChanges" pattern = "{ ($.eventName = CreateTrail) || ($.eventName = StartLogging) || ($.eventName = StopLogging) }" loggroupname = awscloudwatchloggroup.CISCloudWatch_LogsGroup.name metric_transformation { name = "CIS-CloudTrailChanges" namespace = "CISMetricAlarm_Namespace" value = "1" } } resource "awscloudwatchmetricalarm" "ciscloudtrailconfigchangecwalarm" { alarm_name = "CIS-3.5-CloudTrailChanges" comparison_operator = "GreaterThanOrEqualToThreshold" evaluation_periods = "1" metricname = awscloudwatchlogmetricfilter.ciscloudtrailconfigchangemetricfilter.id namespace = "CISMetricAlarm_Namespace" period = "300" statistic = "Sum" threshold = "1" alarm_description = "Monitoring changes to CloudTrail's configuration will help ensure sustained visibility to activities performed in the AWS account." alarmactions = [awssnstopic.CISAlertsSNSTopic.arn] insufficientdataactions = [] } ``` ```tf title="Negative test num. 1 - tf file" resource "awscloudwatchlogmetricfilter" "ciscloudtrailconfigchangemetric_filter" { name = "CIS-CloudTrailChanges" pattern = "{ ($.eventName = CreateTrail) || ($.eventName = UpdateTrail) || ($.eventName = DeleteTrail) || ($.eventName = StartLogging) || ($.eventName = StopLogging) }" loggroupname = awscloudwatchloggroup.CISCloudWatch_LogsGroup.name metric_transformation { name = "CIS-CloudTrailChanges" namespace = "CISMetricAlarm_Namespace" value = "1" } } resource "awscloudwatchmetricalarm" "ciscloudtrailconfigchangecwalarm" { alarm_name = "CIS-3.5-CloudTrailChanges" comparison_operator = "GreaterThanOrEqualToThreshold" evaluation_periods = "1" metricname = awscloudwatchlogmetricfilter.ciscloudtrailconfigchangemetricfilter.id namespace = "CISMetricAlarm_Namespace" period = "300" statistic = "Sum" threshold = "1" alarm_description = "Monitoring changes to CloudTrail's configuration will help ensure sustained visibility to activities performed in the AWS account." alarmactions = [awssnstopic.CISAlertsSNSTopic.arn] insufficientdataactions = [] } ```