New Network ACL Entry Added

testlow
log source: aws · cloudtrailauthor jamesc-grafanadate 2024-07-11
01

description

What this is, in brief.

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.

02

tags

attack.defense-impairmentattack.t1686.001
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rule source (YAML)

title: New Network ACL Entry Added
id: e1f7febb-7b94-4234-b5c6-00fb8500f5dd
status: test
description: |
    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://www.gorillastack.com/blog/real-time-events/important-aws-cloudtrail-security-events-tracking/
author: jamesc-grafana
date: 2024-07-11
tags:
    - attack.defense-impairment
    - attack.t1686.001
logsource:
    product: aws
    service: cloudtrail
detection:
    selection:
        eventSource: 'ec2.amazonaws.com'
        eventName: 'CreateNetworkAclEntry'
    condition: selection
falsepositives:
    - Legitimate use of ACLs to enable customer and staff access from the public internet into a public VPC
level: low
04

detects techniques (1)

ATT&CK techniques this enables or maps to.

05

references

External citations — patches, advisories, analysis.