Service Control Policies Package

AWSTemplateFormatVersion: '2010-09-09'
Description: ''
Resources:
  ScpPolicy1:
    Type: 'Custom::ServiceControlPolicy'
    Properties:
      PolicyName: scp_root_account
      PolicyDescription: >-
        This SCP prevents restricts the root user in an AWS account from taking
        any action, either directly as a command or through the console. 
      PolicyContents: >-
        {"Version":"2012-10-17","Statement":[{"Action":"*","Resource":"*","Effect":"Deny","Condition":{"StringLike":{"aws:PrincipalArn":["arn:aws:iam::*:root"]}}}]}
      ServiceToken:
        'Fn::GetAtt':
          - ScpResourceLambda
          - Arn
  ScpResourceLambdaRole:
    Type: 'AWS::IAM::Role'
    Properties:
      AssumeRolePolicyDocument:
        Version: '2012-10-17'
        Statement:
          - Effect: Allow
            Principal:
              Service: lambda.amazonaws.com
            Action:
              - 'sts:AssumeRole'
      Path: /
      ManagedPolicyArns:
        - 'arn:aws:iam::aws:policy/service-role/AWSLambdaBasicExecutionRole'
      Policies:
        - PolicyName: scp-access
          PolicyDocument:
            Statement:
              - Effect: Allow
                Action:
                  - 'organizations:UpdatePolicy'
                  - 'organizations:DeletePolicy'
                  - 'organizations:CreatePolicy'
                  - 'organizations:ListPolicies'
                Resource: '*'
  ScpResourceLambda:
    Type: 'AWS::Lambda::Function'
    Properties:
      Code:
        ZipFile: |-

          'use strict';
          const AWS = require('aws-sdk');
          const response = require('cfn-response');
          const organizations = new AWS.Organizations({region: 'us-east-1'});

          exports.handler = (event, context, cb) => {
            console.log('Invoke:', JSON.stringify(event));
            const done = (err, data) => {
              if (err) {
                console.log('Error: ', err);
                response.send(event, context, response.FAILED, {}, 'CustomResourcePhysicalID');
              } else {
                response.send(event, context, response.SUCCESS, {}, 'CustomResourcePhysicalID');
              }
            };
            
            const updatePolicies = (policyName, policyAction) => {
              organizations.listPolicies({
                Filter: "SERVICE_CONTROL_POLICY"
               }, function(err, data){
                   if (err) done(err);
                   else {
                     const policy = data.Policies.filter((policy) => (policy.Name === policyName))
                     let policyId = ''
                     if (policy.length > 0) 
                      policyId = policy[0].Id
                     else
                      done('policy not found')
                     if (policyAction === 'Update'){
                       organizations.updatePolicy({
                         Content: event.ResourceProperties.PolicyContents,
                         PolicyId: policyId
                       }, done)
                     }
                     else {
                        organizations.deletePolicy({
                          PolicyId: policyId
                        }, done)
                     }
                   }
               })
            }
            
            if (event.RequestType === 'Update' || event.RequestType === 'Delete') {
              updatePolicies(event.ResourceProperties.PolicyName, event.RequestType)
              
            } else if (event.RequestType === 'Create') {
              organizations.createPolicy({
                    Content: event.ResourceProperties.PolicyContents, 
                    Description: event.ResourceProperties.PolicyDescription, 
                    Name: event.ResourceProperties.PolicyName, 
                    Type: "SERVICE_CONTROL_POLICY"
                   }, done);
            } else {
              cb(new Error('unsupported RequestType: ', event.RequestType));
            }
          };
      Handler: index.handler
      MemorySize: 128
      Role:
        'Fn::GetAtt':
          - ScpResourceLambdaRole
          - Arn
      Runtime: nodejs8.10
      Timeout: 120
  ScpPolicy2:
    Type: 'Custom::ServiceControlPolicy'
    Properties:
      PolicyName: scp_cloudtrail
      PolicyDescription: >-
        This SCP prevents users or roles in any affected account from disabling
        a CloudTrail log, either directly as a command or through the console. 
      PolicyContents: >-
        {"Version":"2012-10-17","Statement":[{"Action":["cloudtrail:StopLogging"],"Resource":"*","Effect":"Deny"}]}
      ServiceToken:
        'Fn::GetAtt':
          - ScpResourceLambda
          - Arn
    DependsOn:
      - ScpPolicy1
  ScpPolicy3:
    Type: 'Custom::ServiceControlPolicy'
    Properties:
      PolicyName: scp_config
      PolicyDescription: >-
        This SCP prevents users or roles in any affected account from running
        AWS Config operations that could disable AWS Config or alter its rules
        or triggers. 
      PolicyContents: >-
        {"Version":"2012-10-17","Statement":[{"Action":["config:DeleteConfigRule","config:DeleteConfigurationRecorder","config:DeleteDeliveryChannel","config:StopConfigurationRecorder"],"Resource":"*","Effect":"Deny"}]}
      ServiceToken:
        'Fn::GetAtt':
          - ScpResourceLambda
          - Arn
    DependsOn:
      - ScpPolicy2
  ScpPolicy4:
    Type: 'Custom::ServiceControlPolicy'
    Properties:
      PolicyName: scp_guardduty
      PolicyDescription: >-
        This SCP prevents users or roles in any affected account from disabling
        or modifying Amazon GuardDuty settings, either directly as a command or
        through the console. 
      PolicyContents: >-
        {"Version":"2012-10-17","Statement":[{"Action":["guardduty:DeleteDetector","guardduty:DeleteInvitations","guardduty:DeleteIPSet","guardduty:DeleteMembers","guardduty:DeleteThreatIntelSet","guardduty:DisassociateFromMasterAccount","guardduty:DisassociateMembers","guardduty:StopMonitoringMembers"],"Resource":"*","Effect":"Deny"}]}
      ServiceToken:
        'Fn::GetAtt':
          - ScpResourceLambda
          - Arn
    DependsOn:
      - ScpPolicy3
  ScpPolicy5:
    Type: 'Custom::ServiceControlPolicy'
    Properties:
      PolicyName: scp_organizations
      PolicyDescription: >-
        This SCP prevents users or roles in any affected account from leaving
        AWS Organizations, either directly as a command or through the console. 
      PolicyContents: >-
        {"Version":"2012-10-17","Statement":[{"Action":["organizations:LeaveOrganization"],"Resource":"*","Effect":"Deny"}]}
      ServiceToken:
        'Fn::GetAtt':
          - ScpResourceLambda
          - Arn
    DependsOn:
      - ScpPolicy4
  ScpPolicy6:
    Type: 'Custom::ServiceControlPolicy'
    Properties:
      PolicyName: scp_account_billing
      PolicyDescription: >-
        This SCP prevents users or roles in any affected account from modifying
        the account and billing settings, either directly as a command or
        through the console.
      PolicyContents: >-
        {"Version":"2012-10-17","Statement":[{"Action":["aws-portal:ModifyAccount","aws-portal:ModifyBilling","aws-portal:ModifyPaymentMethods"],"Resource":"*","Effect":"Deny"}]}
      ServiceToken:
        'Fn::GetAtt':
          - ScpResourceLambda
          - Arn
    DependsOn:
      - ScpPolicy5
  ScpPolicy7:
    Type: 'Custom::ServiceControlPolicy'
    Properties:
      PolicyName: scp_deny_iam_user_creation
      PolicyDescription: >-
        This SCP restricts IAM principals from creating new IAM users or IAM
        Access Keys in an AWS account.
      PolicyContents: >-
        {"Version":"2012-10-17","Statement":[{"Action":["iam:CreateUser","iam:CreateAccessKey"],"Resource":["*"],"Effect":"Deny"}]}
      ServiceToken:
        'Fn::GetAtt':
          - ScpResourceLambda
          - Arn
    DependsOn:
      - ScpPolicy6
Parameters: {}
Metadata: {}
Conditions: {}