prowler/util/terraform-kickstarter/main.tf

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*/

/*
Security Hub Import Commands

Run this to get state of SecurityHub

terraform import aws_securityhub_account.securityhubresource 123456789012

*/

terraform {
  required_providers {
    aws = {
      source  = "hashicorp/aws"
      version = "~> 3.54"
    }
  }
}
provider "aws" {
  region = var.select_region
}

resource "aws_iam_role" "prowler_kick_start_role" {
  name                = "security_baseline_kickstarter_iam_role"
  managed_policy_arns = ["${data.aws_iam_policy.SecurityAudit.arn}",
                         "arn:aws:iam::aws:policy/job-function/SupportUser",
                         "arn:aws:iam::aws:policy/job-function/ViewOnlyAccess"]
  assume_role_policy = jsonencode({
    Version = "2012-10-17"
    Statement = [
      {
        Action="sts:AssumeRole"
        Effect="Allow"
        Sid = "CodeBuildProwler"
        Principal = {Service="codebuild.amazonaws.com"}
      }
    ]
  })
  force_detach_policies=true
}
resource "aws_iam_role" "prowler_event_trigger_role" {
    name = "security_baseline_kickstarter_event_trigger_iam_role"
    assume_role_policy = jsonencode({
                              Version = "2012-10-17"
                              Statement = [
                                {
                                  Action="sts:AssumeRole"
                                  Effect="Allow"
                                  Sid = "TriggerCodeBuild"
                                  Principal = {Service="events.amazonaws.com"}
                                }
                              ]
                            })
    
}
resource "aws_iam_policy" "prowler_event_trigger_policy" {
  depends_on        = [aws_codebuild_project.prowler_codebuild]
  name        = "security_baseline_kickstarter_trigger_iam_policy"
  path        = "/"
  description = "IAM Policy used to trigger the Prowler in AWS Codebuild"
  policy = jsonencode({
     Version = "2012-10-17"
    Statement = [
      {
        Action =  ["codebuild:StartBuild"],
        Effect   = "Allow"
        Resource =  aws_codebuild_project.prowler_codebuild.arn
      }]
  })
}
resource "aws_iam_policy_attachment" "prowler_event_trigger_policy_attach" {
  depends_on = [aws_iam_policy.prowler_event_trigger_policy]
  name       = "prowler_event_trigger_policy_attach"
  roles      = toset([aws_iam_role.prowler_event_trigger_role.id])
  policy_arn = aws_iam_policy.prowler_event_trigger_policy.arn
}
resource "aws_iam_policy" "prowler_kickstarter_iam_policy" {
  name        = "security_baseline_kickstarter_iam_policy"
  path        = "/"
  description = "IAM Policy used to run prowler from codebuild"

  # Terraform's "jsonencode" function converts a
  # Terraform expression result to valid JSON syntax.
  policy = jsonencode({
    Version = "2012-10-17"
    Statement = [
      {
        Action =  [
            "logs:PutLogEvents"
            ],
        Effect   = "Allow"
        Resource =  "arn:aws:logs:*:${data.aws_caller_identity.current.account_id}:log-group:*:log-stream:*"
      },
       {
        Action =  [
            "logs:CreateLogStream",
            "logs:CreateLogGroup"
            ],
        Effect   = "Allow"
        Resource =  "arn:aws:logs:*:${data.aws_caller_identity.current.account_id}:log-group:*"
      },
       {
        Action =  ["sts:AssumeRole"],
        Effect   = "Allow"
        Resource =  "arn:aws:iam::${data.aws_caller_identity.current.account_id}:role/${aws_iam_role.prowler_kick_start_role.name}"
      },
      {
        Action =  [
                  "ds:ListAuthorizedApplications",
                  "ec2:GetEbsEncryptionByDefault",
                  "ecr:Describe*",
                  "support:Describe*",
                  "tag:GetTagKeys",
                  "lambda:GetFunction",
                  "glue:GetConnections",
                  "glue:GetSecurityConfiguration",
                  "glue:SearchTables",
                  "s3:GetAccountPublicAccessBlock",
                  "shield:GetSubscriptionState",
                  "shield:DescribeProtection"
                  ]
        Effect   = "Allow"
        Resource = "arn:aws:glue:${data.aws_region.current.name}:${data.aws_caller_identity.current.account_id}:catalog"
                                    
      },
      {
        Action =  [
                "codebuild:CreateReportGroup",
                "codebuild:CreateReport",
                "codebuild:UpdateReport",
                "codebuild:BatchPutTestCases",
                "codebuild:BatchPutCodeCoverages"
                                    ]
        Effect   = "Allow"
        Resource = "arn:aws:codebuild:${data.aws_region.current.name}:${data.aws_caller_identity.current.account_id}:report-group/*"
                                    
      },
       {
        Action =  [ "securityhub:BatchImportFindings"]
        Effect   = "Allow"
        Resource = "*"                      
      },
             {
        Action =  [ "securityhub:GetFindings"]
        Effect   = "Allow"
        Resource = "*"                      
      },
      { 
            "Action": "codebuild:StartBuild",
            "Resource": "arn:aws:codebuild:${data.aws_region.current.name}:${data.aws_caller_identity.current.account_id}:project/*",
            "Effect": "Allow"
      },
      {
            "Action": ["s3:PutObject", "s3:GetObject", "s3:GetObjectVersion", "s3:GetBucketAcl", "s3:GetBucketLocation"],
            "Resource": "arn:aws:s3:::prowler-kickstart-${data.aws_region.current.name}-${data.aws_caller_identity.current.account_id}-reports/*",
            "Effect": "Allow"
      },
    ]
  })
}
resource "aws_iam_policy_attachment" "prowler_kickstarter_iam_policy_attach" {
  depends_on = [aws_iam_policy.prowler_kickstarter_iam_policy]
  name       = "security_baseline_kickstarter_policy_attach"
  roles      = toset([aws_iam_role.prowler_kick_start_role.id])
  policy_arn = aws_iam_policy.prowler_kickstarter_iam_policy.arn
}
resource "aws_s3_bucket" "prowler_report_storage_bucket" {
    bucket = "prowler-kickstart-${data.aws_region.current.name}-${data.aws_caller_identity.current.account_id}-reports"
    acl = "log-delivery-write"
    versioning {
        enabled = true
    }
    server_side_encryption_configuration {
        rule {
            apply_server_side_encryption_by_default {
                sse_algorithm     = "AES256"
            }
        }
    }
    }

resource "aws_s3_bucket_policy" "prowler_report_storage_bucket_policy" {
    depends_on = [aws_s3_bucket.prowler_report_storage_bucket]
    bucket = aws_s3_bucket.prowler_report_storage_bucket.id
    policy = jsonencode({Version = "2012-10-17"
                            Id      = "ProwlerBucketReportPolicy"
                            Statement = [
                            {
                                Sid       = "S3ForceSSL"
                                Effect    = "Deny"
                                Principal = "*"
                                Action    = "s3:*"
                                Resource = ["${aws_s3_bucket.prowler_report_storage_bucket.arn}/*"]
                                Condition = {
                                Bool = {
                                    "aws:SecureTransport" = "false"
                                    }
                                }
                            },
                            {
                                Sid       = "DenyUnEncryptedObjectUploads"
                                Effect    = "Deny"
                                Principal = "*"
                                Action    = "s3:*"
                                Resource = ["${aws_s3_bucket.prowler_report_storage_bucket.arn}/*"]
                                Condition = {
                                Null = {
                                    "s3:x-amz-server-side-encryption" = "true"
                                    }
                                }
                            }
                            
                            ]
                        })
                        }



resource "aws_s3_bucket_public_access_block" "prowler_report_storage_bucket_block_public" {
    depends_on = [aws_s3_bucket.prowler_report_storage_bucket, aws_s3_bucket_policy.prowler_report_storage_bucket_policy]
    bucket = aws_s3_bucket.prowler_report_storage_bucket.id
    block_public_acls   = true
    block_public_policy = true
    ignore_public_acls = true
    restrict_public_buckets = true
    }

resource "aws_codebuild_project" "prowler_codebuild" {
  name          = "security_baseline_kickstarter_codebuild"
  description   = "Run a Prowler Assessment with Prowler"
  build_timeout = var.codebuild_timeout
  service_role  = aws_iam_role.prowler_kick_start_role.arn

  artifacts {
    type = "NO_ARTIFACTS"
  }

  environment {
    compute_type                = "BUILD_GENERAL1_SMALL"
    image                       = "aws/codebuild/amazonlinux2-x86_64-standard:3.0"
    type                        = "LINUX_CONTAINER"

    environment_variable {
      name  = "BUCKET_REPORT"
      value = "${aws_s3_bucket.prowler_report_storage_bucket.id}"
    }

    environment_variable {
      name  = "PROWLER_OPTIONS"
      type  = "PLAINTEXT"
      value = var.prowler_cli_options
        }
    }


  source {
    type            = "NO_SOURCE"
    buildspec       =  "${file("prowler_build_spec.yml")}"
    }

  tags = {
    Environment = "Prowler KickStarter"
        }
    }





resource "aws_securityhub_account" "securityhub_resource" { 
    }

resource "aws_securityhub_product_subscription" "security_hub_enable_prowler_findings" {
  depends_on  = [aws_securityhub_account.securityhub_resource]
  //arn:aws:securityhub:<REGION>::product/prowler/prowler
  product_arn = "arn:aws:securityhub:${data.aws_region.current.name}::product/prowler/prowler"
    }

resource "aws_cloudwatch_event_rule" "prowler_check_scheduler_event" {

    name = "security_baseline_kickstarter_event_cron"
    description = "Run Prowler every night"
    schedule_expression = var.prowler_schedule
    }

resource "aws_cloudwatch_event_target" "run_prowler_scan" {

  arn       = aws_codebuild_project.prowler_codebuild.arn
  rule      = aws_cloudwatch_event_rule.prowler_check_scheduler_event.name
  role_arn  = aws_iam_role.prowler_event_trigger_role.arn

    }