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prowler/checks/check35
2021-01-22 00:19:45 +01:00

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#!/usr/bin/env bash
# Prowler - the handy cloud security tool (c) by Toni de la Fuente
#
# This Prowler check is licensed under a
# Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
#
# You should have received a copy of the license along with this
# work. If not, see <http://creativecommons.org/licenses/by-nc-sa/4.0/>.
#
# Remediation:
#
# https://d1.awsstatic.com/whitepapers/compliance/AWS_CIS_Foundations_Benchmark.pdf
#
# aws logs put-metric-filter \
# --region us-east-1 \
# --log-group-name CloudTrail/MyCloudTrailLG \
# --filter-name AWSCloudTrailChanges \
# --filter-pattern '{ ($.eventName = CreateTrail) || ($.eventName = UpdateTrail) || ($.eventName = DeleteTrail) || ($.eventName = StartLogging) || ($.eventName = StopLogging) }' \
# --metric-transformations metricName=CloudTrailEventCount,metricNamespace=CloudTrailMetrics,metricValue=1
#
# aws cloudwatch put-metric-alarm \
# --region us-east-1 \
# --alarm-name "CloudTrail Changes" \
# --alarm-description "Triggered by AWS CloudTrail configuration changes." \
# --metric-name CloudTrailEventCount \
# --namespace CloudTrailMetrics \
# --statistic Sum \
# --comparison-operator GreaterThanOrEqualToThreshold \
# --evaluation-periods 1 \
# --period 300 \
# --threshold 1 \
# --actions-enabled \
# --alarm-actions arn:aws:sns:us-east-1:123456789012:CloudWatchAlarmTopic
CHECK_ID_check35="3.5"
CHECK_TITLE_check35="[check35] Ensure a log metric filter and alarm exist for CloudTrail configuration changes (Scored)"
CHECK_SCORED_check35="SCORED"
CHECK_TYPE_check35="LEVEL1"
CHECK_SEVERITY_check35="Medium"
CHECK_ASFF_TYPE_check35="Software and Configuration Checks/Industry and Regulatory Standards/CIS AWS Foundations Benchmark"
CHECK_ASFF_RESOURCE_TYPE_check35="AwsCloudTrailTrail"
CHECK_ALTERNATE_check305="check35"
CHECK_ASFF_COMPLIANCE_TYPE_check35="ens-op.exp.8.aws.trail.1"
CHECK_SERVICENAME_check35="cloudtrail"
check35(){
check3x '\$\.eventName\s*=\s*CreateTrail.+\$\.eventName\s*=\s*UpdateTrail.+\$\.eventName\s*=\s*DeleteTrail.+\$\.eventName\s*=\s*StartLogging.+\$\.eventName\s*=\s*StopLogging'
}