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56 lines
3.0 KiB
Bash
56 lines
3.0 KiB
Bash
#!/usr/bin/env bash
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# Prowler - the handy cloud security tool (copyright 2019) by Toni de la Fuente
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may not
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# use this file except in compliance with the License. You may obtain a copy
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# of the License at http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software distributed
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# under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
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# CONDITIONS OF ANY KIND, either express or implied. See the License for the
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# specific language governing permissions and limitations under the License.
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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 SecurityGroupConfigChanges \
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# --filter-pattern '{ ($.eventName = AuthorizeSecurityGroupIngress) || ($.eventName = AuthorizeSecurityGroupEgress) || ($.eventName = RevokeSecurityGroupIngress) || ($.eventName = RevokeSecurityGroupEgress) || ($.eventName = CreateSecurityGroup) || ($.eventName = DeleteSecurityGroup) }' \
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# --metric-transformations metricName=SecurityGroupEventCount,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 SecurityGroupConfigChangesAlarm \
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# --alarm-description "Triggered by AWS security group(s) config changes." \
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# --metric-name SecurityGroupEventCount \
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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_check310="3.10"
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CHECK_TITLE_check310="[check310] Ensure a log metric filter and alarm exist for security group changes"
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CHECK_SCORED_check310="SCORED"
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CHECK_CIS_LEVEL_check310="LEVEL2"
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CHECK_SEVERITY_check310="Medium"
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CHECK_ASFF_TYPE_check310="Software and Configuration Checks/Industry and Regulatory Standards/CIS AWS Foundations Benchmark"
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CHECK_ASFF_RESOURCE_TYPE_check310="AwsCloudTrailTrail"
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CHECK_ALTERNATE_check310="check310"
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CHECK_SERVICENAME_check310="ec2"
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CHECK_RISK_check310='Monitoring unauthorized API calls will help reveal application errors and may reduce time to detect malicious activity.'
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CHECK_REMEDIATION_check310='It is recommended that a metric filter and alarm be established for unauthorized requests.'
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CHECK_DOC_check310='https://docs.aws.amazon.com/awscloudtrail/latest/userguide/cloudwatch-alarms-for-cloudtrail.html'
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CHECK_CAF_EPIC_check310='Logging and Monitoring'
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check310(){
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check3x '\$\.eventName\s*=\s*AuthorizeSecurityGroupIngress.+\$\.eventName\s*=\s*AuthorizeSecurityGroupEgress.+\$\.eventName\s*=\s*RevokeSecurityGroupIngress.+\$\.eventName\s*=\s*RevokeSecurityGroupEgress.+\$\.eventName\s*=\s*CreateSecurityGroup.+\$\.eventName\s*=\s*DeleteSecurityGroup'
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}
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