Detection: VPC Network ACL Entry Updated
Overview
Detect when a Virtual Private Cloud (VPC) network ACL (NACL) rule was updated. Unauthorized or unintended changes to NACLs can introduce security risks, such as exposing resources to external threats or disrupting legitimate traffic. Monitoring NACL updates ensures network security and operational integrity.
References:
Usage
Run the detection in your terminal:
powerpipe detection run aws_cloudtrail_log_detections.detection.vpc_network_acl_entry_updatedSnapshot and share results via Turbot Pipes:
powerpipe loginpowerpipe detection run aws_cloudtrail_log_detections.detection.vpc_network_acl_entry_updated --shareSQL
This detection uses a named query:
select tp_timestamp as timestamp,string_split(event_source, '.')[1] || ':' || event_name as operation,request_parameters ->> 'networkAclId' as resource,user_identity.arn as actor,tp_source_ip as source_ip,tp_index as account_id,aws_region as region,tp_id as source_id,*
from aws_cloudtrail_logwhere event_source = 'ec2.amazonaws.com' and event_name in ('CreateNetworkAclEntry', 'DeleteNetworkAclEntry', 'ReplaceNetworkAclEntry') and error_code is null
order by event_time desc;