Possible New Network ACL Entry Added (via cloudtrail)

title: Possible New Network ACL Entry Added (via cloudtrail)
id: f2de5bee-d70b-5583-83eb-232ffe63983f
status: stable
description: This rule detects that network ACL entries have been added to a route table which could indicate that new attack vectors have been opened up in the AWS account.
references:
    - https://attack.mitre.org/techniques/T1686/001/
    - https://www.gorillastack.com/blog/real-time-events/important-aws-cloudtrail-security-events-tracking/
author: Huntrule Team
date: 2026-07-03
tags:
    - attack.defense-impairment
    - attack.t1686.001
logsource:
    product: aws
    service: cloudtrail
detection:
    selection:
        eventSource: 'ec2.amazonaws.com'
        eventName: 'CreateNetworkAclEntry'
    condition: selection
falsepositives:
    - Unknown
level: low