{"id":"e1f7febb-7b94-4234-b5c6-00fb8500f5dd","title":"New Network ACL Entry Added","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.\n","author":"jamesc-grafana","status":"test","level":"low","date":"2024-07-11","modified":"","tags":["attack.defense-impairment","attack.t1686.001"],"technique_ids":["T1686.001"],"logsource":{"product":"aws","service":"cloudtrail"},"falsepositives":["Legitimate use of ACLs to enable customer and staff access from the public internet into a public VPC"],"references":["https://www.gorillastack.com/blog/real-time-events/important-aws-cloudtrail-security-events-tracking/"],"source_path":"rules/cloud/aws/cloudtrail/aws_cloudtrail_new_acl_entries.yml","source_sha256":"a3c463725ba9d81e216f6612a3dfcd8ea885f406a0c9904dad8540a5ffe87a69","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/cloud/aws/cloudtrail/aws_cloudtrail_new_acl_entries.yml","license":"Detection Rule License 1.1","license_url":"https://github.com/SigmaHQ/Detection-Rule-License/blob/main/LICENSE.Detection.Rules.md","yaml":"title: New Network ACL Entry Added\nid: e1f7febb-7b94-4234-b5c6-00fb8500f5dd\nstatus: test\ndescription: |\n    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.\nreferences:\n    - https://www.gorillastack.com/blog/real-time-events/important-aws-cloudtrail-security-events-tracking/\nauthor: jamesc-grafana\ndate: 2024-07-11\ntags:\n    - attack.defense-impairment\n    - attack.t1686.001\nlogsource:\n    product: aws\n    service: cloudtrail\ndetection:\n    selection:\n        eventSource: 'ec2.amazonaws.com'\n        eventName: 'CreateNetworkAclEntry'\n    condition: selection\nfalsepositives:\n    - Legitimate use of ACLs to enable customer and staff access from the public internet into a public VPC\nlevel: low\n","validation":"yaml_parsed_not_backend_compiled_or_live_validated","techniques":[{"key":"enterprise/T1686.001","id":"T1686.001","name":"Cloud Firewall","page":"techniques/enterprise/T1686.001/"}],"data_path":"data/detection-rules/e1f7febb-7b94-4234-b5c6-00fb8500f5dd.json","kind":"sigma"}