AWSTemplateFormatVersion: "2010-09-09"
Description: ""
Resources:
  S3SharedBucket:
    Type: "AWS::S3::Bucket"
    Properties:
      LoggingConfiguration: {}
      AccessControl: "LogDeliveryWrite"
      BucketEncryption:
        ServerSideEncryptionConfiguration:
          - ServerSideEncryptionByDefault:
              SSEAlgorithm: "AES256"
      PublicAccessBlockConfiguration:
        BlockPublicAcls: true
        BlockPublicPolicy: true
        IgnorePublicAcls: true
        RestrictPublicBuckets: true
  BucketPolicy:
    Type: "AWS::S3::BucketPolicy"
    Properties:
      Bucket:
        Ref: "S3SharedBucket"
      PolicyDocument:
        Version: "2012-10-17"
        Statement:
          - Principal:
              Service:
                - "cloudtrail.amazonaws.com"
                - "config.amazonaws.com"
            Action:
              - "s3:GetBucketAcl"
            Resource:
              - Fn::GetAtt:
                  - "S3SharedBucket"
                  - "Arn"
            Effect: "Allow"
            Condition: {}
          - Principal:
              Service:
                - "cloudtrail.amazonaws.com"
                - "config.amazonaws.com"
            Action:
              - "s3:PutObject"
            Resource:
              - Fn::Join:
                  - ""
                  -
                    - ""
                    - Fn::GetAtt:
                        - "S3SharedBucket"
                        - "Arn"
                    - "/*"
            Effect: "Allow"
            Condition:
              StringEquals:
                s3:x-amz-acl: "bucket-owner-full-control"
    DependsOn: "S3SharedBucket"
  CloudTrail:
    Type: "AWS::CloudTrail::Trail"
    Properties:
      TrailName: "ManagementEventsTrail"
      IsLogging: true
      EnableLogFileValidation: true
      EventSelectors:
        - IncludeManagementEvents: true
          ReadWriteType: "All"
      IsMultiRegionTrail: true
      IncludeGlobalServiceEvents: true
      S3BucketName:
        Ref: "S3SharedBucket"
      CloudWatchLogsLogGroupArn:
        Fn::GetAtt:
          - "CWLogGroupForCloudTrail"
          - "Arn"
      CloudWatchLogsRoleArn:
        Fn::GetAtt:
          - "IamRoleForCwLogsCloudTrail"
          - "Arn"
    DependsOn:
      - "BucketPolicy"
  IamRoleForCwLogsCloudTrail:
    Type: "AWS::IAM::Role"
    Properties:
      AssumeRolePolicyDocument:
        Version: "2012-10-17"
        Statement:
          - Sid: ""
            Effect: "Allow"
            Principal:
              Service: "cloudtrail.amazonaws.com"
            Action: "sts:AssumeRole"
      Policies:
        - PolicyName: "allow-access-to-cw-logs"
          PolicyDocument:
            Version: "2012-10-17"
            Statement:
              - Effect: "Allow"
                Action:
                  - "logs:CreateLogStream"
                  - "logs:PutLogEvents"
                Resource: "*"
  CWLogGroupForCloudTrail:
    Type: "AWS::Logs::LogGroup"
    Properties:
      LogGroupName: "CloudTrailLogs"
      RetentionInDays: 90
  ConfigurationRecorder:
    Type: "AWS::Config::ConfigurationRecorder"
    Properties:
      RoleARN:
        Fn::GetAtt:
          - "IamRoleForAwsConfig"
          - "Arn"
      RecordingGroup:
        AllSupported: true
        IncludeGlobalResourceTypes: true
  DeliveryChannel:
    Type: "AWS::Config::DeliveryChannel"
    Properties:
      S3BucketName:
        Ref: "S3SharedBucket"
  IamRoleForAwsConfig:
    Type: "AWS::IAM::Role"
    Properties:
      ManagedPolicyArns:
        - "arn:aws:iam::aws:policy/service-role/AWSConfigRole"
      AssumeRolePolicyDocument:
        Version: "2012-10-17"
        Statement:
          - Sid: ""
            Effect: "Allow"
            Principal:
              Service: "config.amazonaws.com"
            Action: "sts:AssumeRole"
      Policies:
        - PolicyName: "allow-access-to-config-s3-bucket"
          PolicyDocument:
            Version: "2012-10-17"
            Statement:
              - Effect: "Allow"
                Action:
                  - "s3:PutObject"
                Resource:
                  - Fn::Join:
                      - ""
                      -
                        - Fn::GetAtt:
                            - "S3SharedBucket"
                            - "Arn"
                        - "/*"
                Condition:
                  StringLike:
                    s3:x-amz-acl: "bucket-owner-full-control"
              - Effect: "Allow"
                Action:
                  - "s3:GetBucketAcl"
                Resource:
                  Fn::GetAtt:
                    - "S3SharedBucket"
                    - "Arn"
      RoleName: "iamRoleForAWSConfig"
  SnsTopic1:
    Type: "AWS::SNS::Topic"
    Properties:
      Subscription:
        - Endpoint: "email@example.com"
          Protocol: "email"
      TopicName: "sns-topic"
  ConfigRule1:
    Type: "AWS::Config::ConfigRule"
    Properties:
      ConfigRuleName: "root-account-mfa-enabled"
      Scope:
        ComplianceResourceTypes: []
      Description: "A Config rule that checks whether users of your AWS account require a multi-factor authentication (MFA) device to sign in with root credentials."
      Source:
        Owner: "AWS"
        SourceIdentifier: "ROOT_ACCOUNT_MFA_ENABLED"
      MaximumExecutionFrequency: "TwentyFour_Hours"
    DependsOn:
      - "ConfigurationRecorder"
  ConfigRule3:
    Type: "AWS::Config::ConfigRule"
    Properties:
      ConfigRuleName: "iam-root-access-key-check"
      Scope:
        ComplianceResourceTypes: []
      Description: "A config rule that checks whether the root user access key is available. The rule is COMPLIANT if the user access key does not exist."
      Source:
        Owner: "AWS"
        SourceIdentifier: "IAM_ROOT_ACCESS_KEY_CHECK"
      MaximumExecutionFrequency: "TwentyFour_Hours"
    DependsOn:
      - "ConfigurationRecorder"
  CwEvent1:
    Type: "AWS::Events::Rule"
    Properties:
      Name: "detect-config-rule-compliance-changes"
      Description: "A CloudWatch Event Rule that detects changes to AWS Config Rule compliance status and publishes change events to an SNS topic for notification."
      State: "ENABLED"
      Targets:
        - Arn:
            Ref: "SnsTopic1"
          Id: "target-id1"
      EventPattern:
        detail-type:
          - "Config Rules Compliance Change"
        source:
          - "aws.config"
  SnsTopicPolicyCwEvent1:
    Type: "AWS::SNS::TopicPolicy"
    Properties:
      PolicyDocument:
        Statement:
          - Sid: "__default_statement_ID"
            Effect: "Allow"
            Principal:
              AWS: "*"
            Action:
              - "SNS:GetTopicAttributes"
              - "SNS:SetTopicAttributes"
              - "SNS:AddPermission"
              - "SNS:RemovePermission"
              - "SNS:DeleteTopic"
              - "SNS:Subscribe"
              - "SNS:ListSubscriptionsByTopic"
              - "SNS:Publish"
              - "SNS:Receive"
            Resource:
              Ref: "SnsTopic1"
            Condition:
              StringEquals:
                AWS:SourceOwner:
                  Ref: "AWS::AccountId"
          - Sid: "TrustCWEToPublishEventsToMyTopic"
            Effect: "Allow"
            Principal:
              Service: "events.amazonaws.com"
            Action: "sns:Publish"
            Resource:
              Ref: "SnsTopic1"
      Topics:
        - Ref: "SnsTopic1"
  CwAlarm1:
    Type: "AWS::CloudWatch::Alarm"
    Properties:
      AlarmName: "root_account_login"
      AlarmDescription: "A CloudWatch Alarm that triggers if a root user uses the account."
      MetricName: "RootUserEventCount"
      Namespace: "CloudTrailMetrics"
      Statistic: "Sum"
      Period: "60"
      EvaluationPeriods: "1"
      Threshold: "1"
      ComparisonOperator: "GreaterThanOrEqualToThreshold"
      AlarmActions:
        - Ref: "SnsTopic1"
      TreatMissingData: "notBreaching"
  MetricFilter1:
    Type: "AWS::Logs::MetricFilter"
    Properties:
      LogGroupName:
        Ref: "CWLogGroupForCloudTrail"
      FilterPattern: "{ ($.userIdentity.type = \"Root\") && ($.userIdentity.invokedBy NOT EXISTS) && ($.eventType != \"AwsServiceEvent\") }"
      MetricTransformations:
        - MetricValue: "1"
          MetricNamespace: "CloudTrailMetrics"
          MetricName: "RootUserEventCount"
Parameters: {}
Metadata: {}
Conditions: {}