AWS Security Check

Welcome to the AWS Security Checks Module! This module is designed to perform security compliance checks on AWS accounts according to the CIS Level 1, CIS Level 2, and SOC 2 frameworks. It helps ensure that your AWS infrastructure aligns with these security standards.

Introduction

The AWS Security Checks Module is a powerful tool for automating the process of auditing and validating AWS accounts against common security benchmarks. It provides a structured framework for performing CIS Level 1, CIS Level 2, and SOC 2 compliance checks.

Important note

For acheiving 100% compliant for AWS Infrastructure we need to perform some manual checks which are listed in the respective directory of cis-levels.

For encrypting cloudwatch log group of cloudtrail please use this KMS key policy. Please change the account id and region.

{
    "Version": "2012-10-17",
    "Id": "allow-cloudwatch-logs-encryption",
    "Statement": [
        {
            "Sid": "AllowRootFullPermissions",
            "Effect": "Allow",
            "Principal": {
                "AWS": "arn:aws:iam::12345678:root"
            },
            "Action": "kms:*",
            "Resource": "*"
        },
        {
            "Sid": "AllowCloudWatchLogsEncryption",
            "Effect": "Allow",
            "Principal": {
                "Service": "logs.us-east-2.amazonaws.com"
            },
            "Action": [
                "kms:Encrypt*",
                "kms:Decrypt*",
                "kms:ReEncrypt*",
                "kms:GenerateDataKey*",
                "kms:Describe*"
            ],
            "Resource": "*"
        }
    ]
}

Features

• Pre-configured checks for CIS Level 1, CIS Level 2, and SOC 2 security benchmarks.
• Organized folder structure for easy navigation and maintenance.
• Customizable configurations to adapt to different environments.
• Automated and repeatable security assessment process.

Directory Structure

The module is organized into the following directory:

• cis-level-1: Contains code for CIS Level 1 compliance checks.
• cis-level-2: Contains code for CIS Level 2 compliance checks.
• soc2: Contains code for SOC 2 compliance checks.
• examples: Contains example scripts to call compliance checks based on the desired level.

Each folder contains configuration files specific to the corresponding security framework.

Getting Started

To get started with the AWS Security Checks Module, follow these steps:

1. Clone the repository to your local machine: https://github.com/sq-ia/terraform-aws-infrasec
2. Navigate to the desired framework folder (cis-level-1, cis-level-2, or soc2).
3. Review the documentation for each check to understand its purpose and requirements.

Usage

The examples folder contains terraform code to call compliance checks based on the desired level:

• To perform CIS Level 1, Level 2 and soc2 check input the value of variable check_level. Please refer the below example.

module "cis" {

  source = "../../"

  name                                  = "skaf"
  region                                = "us-east-1"
  email                                 = "skaf-demo@squareops.com"
  cron_expression                       = "cron(0 22 1,10,20,28 * ? 2023)"
  check_level                           = ["level-1", "level-2", "soc2"] ##Enter check level (level-1 or level-2 or soc2)
  s3_enabled                            = true
  config_enabled                        = true
  include_global_resource_types         = true
  cw_log_enabled                        = true
  alerting_enabled                      = true
  multiple_access_key_notification      = true
  multiple_access_key_deactivate        = false
  disable_unused_credentials            = true
  disable_unused_credentials_after_days = 90
  remove_ssl_tls_iam                    = false
  enable_guard_duty                     = true
  enable_security_hub                   = true
  enable_aws_macie                      = true
  mfa_iam_group_name                    = "mfa-group" ## enter your IAM user group for mfa
  cloudwatch_logs_kms_key_arn           = "arn:aws:kms:us-east-2:222222222222:key/kms_key_arn" ## enter kms key arn for encrypting cloudwatch log group of cloud trail
  cloudwatch_log_group_retention_days   = 60
  s3_object_expiration_days             = 90
}

Requirements

Name	Version
terraform	> 1.0.0

Providers

Name	Version
aws	n/a

Modules

Name	Source	Version
cis-level-1	./modules/cis-level-1	n/a
cis-level-2	./modules/cis-level-2	n/a
soc2	./modules/soc2	n/a

Resources

Name	Type
aws_region.current	data source

Inputs

Name	Description	Type	Default	Required
alarm_namespace	Namespace for the CloudWatch Alarm Metric	string	"CISBenchmark"	no
alerting_enabled	Enable alerting	bool	true	no
audit_log_bucket_custom_policy_json	Override the custom policy for the S3 logging bucket (JSON format).	string	""	no
check_level	List of CIS checks to deploy.	list(any)	[]	no
cloudtrail_event_selector_type	Types of events that will be aggregated in CloudTrail	string	"All"	no
cloudtrail_kms_policy	KMS policy for Cloudtrail Logs	string	""	no
cloudwatch_log_group_retention_days	Number of days to retain logs in CloudWatch log groups for CloudTrail.	number	30	no
cloudwatch_logs_kms_key_arn	KMS key for CloudWatch Logs Encryption	string	""	no
config_enabled	Set to true to enable AWS Config.	bool	true	no
cron_expression	Cron expression to trigger a Lambda function on a regular schedule.	string	"cron(0 22 1,10,20,28 * ? 2023)"	no
cw_log_enabled	Set it to true to aggregate logs on CloudWatch	bool	true	no
disable_unused_credentials	Disable unused IAM user credentials.	bool	false	no
disable_unused_credentials_after_days	Number of days after which unused IAM credentials will be disabled.	number	"90"	no
email	Email address for receiving notifications from Amazon SNS.	string	""	no
enable_aws_macie	Enable AWS Macie for data discovery and protection.	bool	true	no
enable_guard_duty	Enable AWS GuardDuty for threat detection.	bool	true	no
enable_security_hub	Enable AWS Security Hub for centralized security monitoring.	bool	true	no
iam_allow_users_to_change_password	Set it to true to allow users to change their own password	bool	true	no
iam_hard_expiry	Set it true to enforce hard password expiration for all users.	bool	true	no
iam_max_password_age	Maximum password age in days before expiration.	number	90	no
iam_minimum_password_length	Minimum length requirement for user passwords.	number	14	no
iam_password_reuse_prevention	Prevent password reuse multiple times	number	24	no
iam_require_lowercase_characters	Require at least one lowercase letter in passwords	bool	true	no
iam_require_numbers	Require at least one number in passwords	bool	true	no
iam_require_symbols	Require at least one symbol in passwords	bool	true	no
iam_require_uppercase_characters	Require at least one uppercase letter in passwords	bool	true	no
include_global_resource_types	Set it to true to enable recording of global resources in AWS Config	bool	true	no
mfa_iam_group_name	Name of the IAM user group to which MFA user policies will be added.	string	"test-user-group"	no
multiple_access_key_deactivate	Deactivate newly created active access keys for IAM users.	bool	false	no
multiple_access_key_notification	Send email notifications for IAM users with multiple active access keys.	bool	true	no
name	Prefix for all resources (e.g., 'my-app') to identify them in the cloud environment.	string	""	no
region	AWS region where resources will be provisioned.	string	"us-east-2"	no
remove_ssl_tls_iam	Remove expired SSL/TLS certificates from IAM.	bool	false	no
s3_enabled	Set to true to enable exporting CloudTrail logs to an S3 bucket.	bool	true	no
s3_object_expiration_days	Number of days after which object of s3 expires.	number	"90"	no
tags	Tags to be used in all the resources	map(string)	{ "key": "AWS_CIS_Benchmark", "value": "1.2.0" }	no

Outputs

Name	Description
access_log_bucket_arn	S3 bucket for storing audit logs of config.
access_log_bucket_id	S3 bucket for storing audit logs of config.
audit_bucket_arn	S3 bucket for storing audit logs of config.
audit_bucket_id	S3 bucket for storing audit logs of config.
sns_topic_arn	SNS topic arn

Contribution & Issue Reporting

To report an issue with a project:

1. Check the repository's issue tracker on GitHub
2. Search to see if the issue has already been reported
3. If you can't find an answer to your question in the documentation or issue tracker, you can ask a question by creating a new issue. Be sure to provide enough context and details so others can understand your problem.

License

Apache License, Version 2.0, January 2004 (http://www.apache.org/licenses/).

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