Amazon Inspectorの脆弱性検知対象を絞り、検知内容をメール通知させてみた

AWSTemplateFormatVersion: '2010-09-09'
Description: EventBridge rule for AWS Inspector2 findings with email notification

Resources:
  InspectorFindingSNSTopic:
    Type: AWS::SNS::Topic
    Properties:
      TopicName: InspectorFindingTopic

  InspectorFindingEmailSubscription:
    Type: AWS::SNS::Subscription
    Properties:
      Protocol: email
      Endpoint: test@test.com　#担当者のメールアドレス入力
      TopicArn: !Ref InspectorFindingSNSTopic

  EventBridgeToSNSRole:
    Type: AWS::IAM::Role
    Properties:
      RoleName: EventBridgeToSNSPublishRole
      AssumeRolePolicyDocument:
        Version: '2012-10-17'
        Statement:
          - Effect: Allow
            Principal:
              Service: events.amazonaws.com
            Action: sts:AssumeRole
      Policies:
        - PolicyName: AllowSNSPublish
          PolicyDocument:
            Version: '2012-10-17'
            Statement:
              - Effect: Allow
                Action:
                  - sns:Publish
                Resource: !Ref InspectorFindingSNSTopic

  InspectorFindingRule:
    Type: AWS::Events::Rule
    Properties:
      Name: InspectorFindingRule
      Description: Trigger on HIGH or CRITICAL Inspector2 findings
      EventPattern:
        source:
          - aws.inspector2
        detail-type:
          - Inspector2 Finding
        detail:
          severity:
            - HIGH
            - CRITICAL
          status:
            - ACTIVE
      Targets:
        - Arn: !Ref InspectorFindingSNSTopic
          Id: "InspectorFindingSNSTarget"
          RoleArn: !GetAtt EventBridgeToSNSRole.Arn
          InputTransformer:
            InputPathsMap:
              description: "$.detail.description"
              region: "$.detail.resources[0].region"
              resource_id: "$.detail.resources[0].id"
              severity: "$.detail.severity"
              time: "$.time"
              title: "$.detail.title"
            InputTemplate: |
              {
                "重要度": "<severity>",
                "発生日時": "<time>",
                "検出タイプ": "<title>",
                "リージョン": "<region>",
                "タイプの説明": "<description>",
                "message": "詳細は Inspector コンソール（ https://console.aws.amazon.com/inspector/v2/home?region=<region>#/findings/instances/<resource_id> ）を確認してください。"
              }