AWS CloudTrail - CloudWatch - SNS Terraform module

A Terraform module that creates a multi-regional Trail, connects it with a CloudWatch Log Group, and creates a number of metric filters and metric alerts to receive SNS notifications for the following actions:

• Root login
• Console login without MFA
• Action without MFA
• Illegal use of a KMS key
• Use of a KMS Key to decrypt
• Changes in security groups
• Changes in IAM
• Changes in route tables
• Changes in NACL

Here is a simplified diagram of the infrastructure:

Terraform versions

The module has been tested using Terraform 0.12.

Usage

module "security_alerts" {
  source = "github.com/menendezjaume/terraform-cloudtrail-cloudwatch-sns"

  s3_bucket_name  = "my-bucket-name"
  namespace       = "my-namespace"
  cloudtrail_name = "my-cloudtrail-names"
}

Inputs

Name	Description	Type	Default	Required
cloudtrail_name	Name of the cloudtrail to be created.	string	n/a	yes
s3_bucket_name	Name of the S3 Bucket to be created.	string	n/a	yes
namespace	The namespace for the module to use.	string	n/a	yes
prefix	Prefix to use for the cloudtrail logs.	string	""	no
retention_in_days	The number of days log events are retained in the log group to be created.	number	30	no
tags	Tags.	map	Environment = "Terraform"	no

Outputs

Name	Description
sns_arn	The Amazon Resource Name (ARN) for the SNS topic Security Alerts created
sns_subscription_page	The AWS Subscription Page for the SNS topic Security Alerts created

Authors

Currently maintained by @menendezjaume. See menendezjaume.com for more information.

License

Apache 2 Licensed. See LICENSE for full details.