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feat: Included 7.x rules for aws nist 800-53 rev4
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src/aws/nist-800-53-rev4/rules/aws-nist-800-53-rev4-7.1.ts
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| export default { | ||
| id: 'aws-nist-800-53-rev4-7.1', | ||
| title: 'AWS NIST 7.1 Alarm for denied connections in CloudFront logs should be configured', | ||
|
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| description: 'Alarms should be configured to alert users to denied connections to CloudFront distributions so users can investigate anomalous traffic.', | ||
|
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| audit: '', | ||
|
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| rationale: '', | ||
|
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| remediation: `**Console Remediation Steps** | ||
| - Navigate to [CloudFront](https://console.aws.amazon.com/cloudfront). | ||
| - Under Reports & analytics, select Alarms. | ||
| - Click Create Alarm. | ||
| - In the Metric drop-down, select 4xx Error Rate. | ||
| - In the Distribution drop-down, select your distribution. | ||
| - In the Name of alarm field, provide a name for your alarm. | ||
| - Determine if you wish to send a notification to an SNS topic and select the topic in the drop down menu. | ||
| - Use the Whenever Sum of Requests drop down and text box to set your threshold. | ||
| - Use the For at least text box and consecutive period(s) of drop-down to set your period. | ||
| - Click Create Alarm. | ||
| - Note you may also use [CloudWatch](https://console.aws.amazon.com/cloudwatch) to create alarms. | ||
| **CLI Remediation Steps** | ||
| Create a CloudWatch alarm to trigger on HTTP 4xx error codes to alert when client behavior is outside your expectations. | ||
| aws cloudwatch put-metric-alarm --alarm-name <name> --evaluation-periods <number-of-samples> --comparison-operator <comparison-operator> --metric-name 4xxErrorRate --namespace "AWS/CloudFront" --period <evaluated-every-x> --threshold <your-expectation> --statistic <aggregated-by> --unit <unit-of-measure> | ||
| Similarly, create a CloudWatch alarm to trigger on HTTP 5xx error codes when your system internal errors are outside your expectations. | ||
| aws cloudwatch put-metric-alarm --alarm-name <name> --evaluation-periods <number-of-samples> --comparison-operator <comparison-operator> --metric-name 5xxErrorRate --namespace "AWS/CloudFront" --period <evaluated-every-x> --threshold <your-expectation> --statistic <aggregated-by> --unit <unit-of-measure>`, | ||
|
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| references: [ | ||
| 'https://docs.aws.amazon.com/AmazonCloudFront/latest/DeveloperGuide/AccessLogs.html', | ||
| 'https://docs.aws.amazon.com/cli/latest/reference/cloudwatch/put-metric-alarm.html', | ||
| ], | ||
| gql: `{ | ||
| queryawsCloudfront { | ||
| id | ||
| arn | ||
| accountId | ||
| __typename | ||
| cloudwatches { | ||
| metric | ||
| } | ||
| } | ||
| }`, | ||
| resource: 'queryawsCloudfront[*]', | ||
| severity: 'medium', | ||
| conditions: { | ||
| jq: '.cloudwatches | map(select(.metric == "4xxErrorRate" or .metric == "5xxErrorRate")) | { "twoOrMore" : (length >= 2) }', | ||
| path: '@', | ||
| and: [ | ||
| { | ||
| path: '@.twoOrMore', | ||
| equal: true, | ||
| }, | ||
| ], | ||
| } | ||
| } |
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src/aws/nist-800-53-rev4/rules/aws-nist-800-53-rev4-7.10.ts
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| // AWS CIS 1.2.0 Rule equivalent 3.1 | ||
| export default { | ||
| id: 'aws-nist-800-53-rev4-7.10', | ||
| title: 'AWS NIST 7.10 CloudWatch log metric filter and alarm for unauthorized API calls should be configured', | ||
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| description: `Real-time monitoring of API calls can be achieved by directing CloudTrail Logs to | ||
| CloudWatch Logs and establishing corresponding metric filters and alarms. It is | ||
| recommended that a metric filter and alarm be established for unauthorized API calls.`, | ||
|
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| audit: `Perform the following to ensure that there is at least one active multi-region CloudTrail with prescribed metric filters and alarms configured: | ||
| 1. Identify the log group name configured for use with active multi-region CloudTrail: | ||
| - List all CloudTrails: *aws cloudtrail describe-trails* | ||
| - Identify Multi region Cloudtrails: *Trails with "IsMultiRegionTrail" set to true* | ||
| - From value associated with CloudWatchLogsLogGroupArn note *<cloudtrail_log_group_name>* | ||
| Example: for CloudWatchLogsLogGroupArn that looks like *arn:aws:logs:<region>:<aws_account_number>:log-group:NewGroup:*, <cloudtrail_log_group_name>* would be *NewGroup* | ||
| - Ensure Identified Multi region CloudTrail is active | ||
| *aws cloudtrail get-trail-status --name <Name_of_a_Multi-region_CloudTrail>* ensure *IsLogging* is set to *TRUE* | ||
| - Ensure identified Multi-region Cloudtrail captures all Management Events | ||
| *aws cloudtrail get-event-selectors --trail-name <trailname_shown_in_describe-trails>* | ||
| Ensure there is at least one Event Selector for a Trail with *IncludeManagementEvents* set to *true* and *ReadWriteType* set to *All* | ||
| 2. Get a list of all associated metric filters for this *<cloudtrail_log_group_name>*: | ||
| aws logs describe-metric-filters --log-group-name "<cloudtrail_log_group_name>" | ||
| 3. Ensure the output from the above command contains the following: | ||
| "filterPattern": "{ ($.errorCode = "*UnauthorizedOperation") || ($.errorCode = "AccessDenied*") }" | ||
| 4. Note the *<unauthorized_api_calls_metric>* value associated with the filterPattern found in step 3. | ||
| 5. Get a list of CloudWatch alarms and filter on the *<unauthorized_api_calls_metric>* captured in step 4. | ||
| aws cloudwatch describe-alarms --query 'MetricAlarms[?MetricName== "<unauthorized_api_calls_metric>"]' | ||
| 6. Note the *AlarmActions* value - this will provide the SNS topic ARN value. | ||
| 7. Ensure there is at least one active subscriber to the SNS topic | ||
| aws sns list-subscriptions-by-topic --topic-arn <sns_topic_arn> | ||
| at least one subscription should have "SubscriptionArn" with valid aws ARN. | ||
| Example of valid "SubscriptionArn": "arn:aws:sns:<region>:<aws_account_number>:<SnsTopicName>:<SubscriptionID>"`, | ||
|
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| rationale: 'Monitoring unauthorized API calls will help reveal application errors and may reduce time to detect malicious activity.', | ||
|
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| remediation: `Perform the following to setup the metric filter, alarm, SNS topic, and subscription: | ||
| 1. Create a metric filter based on the filter pattern provided which checks for unauthorized API calls and the *<cloudtrail_log_group_name>* taken from audit step 1. | ||
| aws logs put-metric-filter --log-group-name <cloudtrail_log_group_name> -- filter-name "<unauthorized_api_calls_metric>" --metric-transformations metricName= "<unauthorized_api_calls_metric>",metricNamespace='CISBenchmark',metricValue=1 --filter-pattern '{ ($.errorCode = "*UnauthorizedOperation") || ($.errorCode = "AccessDenied*") }' | ||
| **Note**: You can choose your own metricName and metricNamespace strings. Using the same metricNamespace for all Foundations Benchmark metrics will group them together. | ||
| 2. Create an SNS topic that the alarm will notify | ||
| aws sns create-topic --name <sns_topic_name> | ||
| **Note** : you can execute this command once and then re-use the same topic for all monitoring alarms. | ||
| 3. Create an SNS subscription to the topic created in step 2 | ||
| aws sns subscribe --topic-arn <sns_topic_arn> --protocol <protocol_for_sns> -- notification-endpoint <sns_subscription_endpoints> | ||
| **Note**: you can execute this command once and then re-use the SNS subscription for all monitoring alarms. | ||
| 4. Create an alarm that is associated with the CloudWatch Logs Metric Filter created in step 1 and an SNS topic created in step 2 | ||
| aws cloudwatch put-metric-alarm --alarm-name "<unauthorized_api_calls_alarm>" --metric-name "<unauthorized_api_calls_metric>" --statistic Sum --period 300 --threshold 1 --comparison-operator GreaterThanOrEqualToThreshold --evaluation-periods 1 -- namespace 'CISBenchmark' --alarm-actions <sns_topic_arn>`, | ||
| references: [ | ||
| 'https://aws.amazon.com/sns/', | ||
| 'https://docs.aws.amazon.com/awscloudtrail/latest/userguide/receive-cloudtrail-log-files-from-multiple-regions.html', | ||
| 'https://docs.aws.amazon.com/awscloudtrail/latest/userguide/cloudwatch-alarms-for-cloudtrail.html', | ||
| 'https://docs.aws.amazon.com/sns/latest/dg/SubscribeTopic.html', | ||
| ], | ||
| gql: `{ | ||
| queryawsAccount { | ||
| id | ||
| __typename | ||
| cloudtrail { | ||
| isMultiRegionTrail | ||
| status { | ||
| isLogging | ||
| } | ||
| eventSelectors { | ||
| id | ||
| readWriteType | ||
| includeManagementEvents | ||
| } | ||
| cloudwatchLog { | ||
| arn | ||
| metricFilters { | ||
| id | ||
| filterName | ||
| filterPattern | ||
| metricTransformations { | ||
| metricName | ||
| } | ||
| } | ||
| cloudwatch { | ||
| metric | ||
| arn | ||
| actions | ||
| sns { | ||
| arn | ||
| subscriptions { | ||
| arn | ||
| } | ||
| } | ||
| } | ||
| } | ||
| } | ||
| } | ||
| }`, | ||
| resource: 'queryawsAccount[*]', | ||
| severity: 'medium', | ||
| conditions: { | ||
| path: '@.cloudtrail', | ||
| array_any: { | ||
| and: [ | ||
| { | ||
| path: '[*].isMultiRegionTrail', | ||
| equal: 'Yes', | ||
| }, | ||
| { | ||
| path: '[*].status.isLogging', | ||
| equal: true, | ||
| }, | ||
| { | ||
| path: '[*].eventSelectors', | ||
| array_any: { | ||
| and: [ | ||
| { path: '[*].readWriteType', equal: 'All' }, | ||
| { | ||
| path: '[*].includeManagementEvents', | ||
| equal: true, | ||
| }, | ||
| ], | ||
| }, | ||
| }, | ||
| { | ||
| path: '[*].cloudwatchLog', | ||
| jq: '[.[].metricFilters[] + .[].cloudwatch[] | select(.metricTransformations[].metricName == .metric)]', | ||
| array_any: { | ||
| and: [ | ||
| { | ||
| path: '[*].filterPattern', | ||
| match: /(\$.errorCode)\s*=\s*"UnauthorizedOperation"/, | ||
| }, | ||
| { | ||
| path: '[*].filterPattern', | ||
| match: /(\$.errorCode)\s*=\s*"AccessDenied"/, | ||
| }, | ||
| { | ||
| path: '[*].sns', | ||
| array_any: { | ||
| path: '[*].subscriptions', | ||
| array_any: { | ||
| path: '[*].arn', | ||
| match: /^arn:aws:.*$/, | ||
| }, | ||
| }, | ||
| }, | ||
| ], | ||
| }, | ||
| }, | ||
| ], | ||
| }, | ||
| }, | ||
| } |
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