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54 lines
3.3 KiB
Bash
54 lines
3.3 KiB
Bash
#!/usr/bin/env bash
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# Prowler - the handy cloud security tool (c) by Toni de la Fuente
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#
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# This Prowler check is licensed under a
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# Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
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#
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# You should have received a copy of the license along with this
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# work. If not, see <http://creativecommons.org/licenses/by-nc-sa/4.0/>.
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#
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# Remediation:
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#
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# https://d1.awsstatic.com/whitepapers/compliance/AWS_CIS_Foundations_Benchmark.pdf
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#
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# aws logs put-metric-filter \
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# --region us-east-1 \
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# --log-group-name CloudTrail/CloudWatchLogGroup \
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# --filter-name IAMAuthConfigChanges \
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# --filter-pattern '{ ($.eventName = DeleteGroupPolicy) || ($.eventName = DeleteRolePolicy) || ($.eventName = DeleteUserPolicy) || ($.eventName = PutGroupPolicy) || ($.eventName = PutRolePolicy) || ($.eventName = PutUserPolicy) || ($.eventName = CreatePolicy) || ($.eventName = DeletePolicy) || ($.eventName = CreatePolicyVersion) || ($.eventName = DeletePolicyVersion) || ($.eventName = AttachRolePolicy) || ($.eventName = DetachRolePolicy) || ($.eventName = AttachUserPolicy) || ($.eventName = DetachUserPolicy) || ($.eventName = AttachGroupPolicy) || ($.eventName = DetachGroupPolicy) }' \
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# --metric-transformations metricName=IAMPolicyEventCount,metricNamespace=CloudTrailMetrics,metricValue=1
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#
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# aws cloudwatch put-metric-alarm \
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# --region us-east-1 \
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# --alarm-name IAMAuthorizationActivityAlarm \
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# --alarm-description "Triggered by AWS IAM authorization config changes." \
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# --metric-name IAMPolicyEventCount \
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# --namespace CloudTrailMetrics \
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# --statistic Sum \
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# --comparison-operator GreaterThanOrEqualToThreshold \
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# --evaluation-periods 1 \
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# --period 300 \
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# --threshold 1 \
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# --actions-enabled \
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# --alarm-actions arn:aws:sns:us-east-1:123456789012:CloudWatchAlarmTopic
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CHECK_ID_check34="3.4"
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CHECK_TITLE_check34="[check34] Ensure a log metric filter and alarm exist for IAM policy changes (Scored)"
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CHECK_SCORED_check34="SCORED"
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CHECK_TYPE_check34="LEVEL1"
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CHECK_SEVERITY_check34="Medium"
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CHECK_ASFF_TYPE_check34="Software and Configuration Checks/Industry and Regulatory Standards/CIS AWS Foundations Benchmark"
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CHECK_ASFF_RESOURCE_TYPE_check34="AwsCloudTrailTrail"
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CHECK_ALTERNATE_check304="check34"
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CHECK_ASFF_COMPLIANCE_TYPE_check34="ens-op.exp.8.aws.trail.6"
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CHECK_SERVICENAME_check34="iam"
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CHECK_RISK_check34='Monitoring unauthorized API calls will help reveal application errors and may reduce time to detect malicious activity.'
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CHECK_REMEDIATION_check34='It is recommended that a metric filter and alarm be established for unauthorized requests.'
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CHECK_DOC_check34='https://docs.aws.amazon.com/awscloudtrail/latest/userguide/cloudwatch-alarms-for-cloudtrail.html'
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CHECK_CAF_EPIC_check34='IAM'
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check34(){
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check3x '\$\.eventName\s*=\s*DeleteGroupPolicy.+\$\.eventName\s*=\s*DeleteRolePolicy.+\$\.eventName\s*=\s*DeleteUserPolicy.+\$\.eventName\s*=\s*PutGroupPolicy.+\$\.eventName\s*=\s*PutRolePolicy.+\$\.eventName\s*=\s*PutUserPolicy.+\$\.eventName\s*=\s*CreatePolicy.+\$\.eventName\s*=\s*DeletePolicy.+\$\.eventName\s*=\s*CreatePolicyVersion.+\$\.eventName\s*=\s*DeletePolicyVersion.+\$\.eventName\s*=\s*AttachRolePolicy.+\$\.eventName\s*=\s*DetachRolePolicy.+\$\.eventName\s*=\s*AttachUserPolicy.+\$\.eventName\s*=\s*DetachUserPolicy.+\$\.eventName\s*=\s*AttachGroupPolicy.+\$\.eventName\s*=\s*DetachGroupPolicy'
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}
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