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54 lines
2.4 KiB
Bash
54 lines
2.4 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/MyCloudTrailLG \
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# --filter-name AWSAuthorizationFailures \
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# --filter-pattern '{ $.errorCode = "*UnauthorizedOperation" || $.errorCode = "AccessDenied*" }' \
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# --metric-transformations metricName=AuthorizationFailureCount,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 "Authorization Failures" \
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# --alarm-description "Alarm triggered when unauthorized API calls are made" \
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# --metric-name AuthorizationFailureCount \
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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_check31="3.1"
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CHECK_TITLE_check31="[check31] Ensure a log metric filter and alarm exist for unauthorized API calls (Scored)"
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CHECK_SCORED_check31="SCORED"
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CHECK_TYPE_check31="LEVEL1"
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CHECK_SEVERITY_check31="Medium"
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CHECK_ASFF_TYPE_check31="Software and Configuration Checks/Industry and Regulatory Standards/CIS AWS Foundations Benchmark"
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CHECK_ASFF_RESOURCE_TYPE_check31="AwsCloudTrailTrail"
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CHECK_ALTERNATE_check301="check31"
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CHECK_ASFF_COMPLIANCE_TYPE_check31="ens-op.exp.8.aws.trail.2"
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CHECK_SERVICENAME_check31="iam"
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CHECK_RISK_check31='Monitoring unauthorized API calls will help reveal application errors and may reduce time to detect malicious activity.'
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CHECK_REMEDIATION_check31='It is recommended that a metric filter and alarm be established for unauthorized requests.'
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CHECK_DOC_check31='https://docs.aws.amazon.com/awscloudtrail/latest/userguide/cloudwatch-alarms-for-cloudtrail.html'
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CHECK_CAF_EPIC_check31='Logging and Monitoring'
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check31(){
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check3x '\$\.errorCode\s*=\s*"\*UnauthorizedOperation".+\$\.errorCode\s*=\s*"AccessDenied\*"'
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}
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