AWS EC2 Network Access Control List Deletion
editAWS EC2 Network Access Control List Deletion
editIdentifies the deletion of an Amazon Elastic Compute Cloud (EC2) network access control list (ACL) or one of its ingress/egress entries.
Rule type: query
Rule indices:
- filebeat-*
- logs-aws.cloudtrail-*
Severity: medium
Risk score: 47
Runs every: 10m
Searches indices from: now-60m (Date Math format, see also Additional look-back time)
Maximum alerts per execution: 100
References:
- https://awscli.amazonaws.com/v2/documentation/api/latest/reference/ec2/delete-network-acl.html
- https://docs.aws.amazon.com/AWSEC2/latest/APIReference/API_DeleteNetworkAcl.html
- https://awscli.amazonaws.com/v2/documentation/api/latest/reference/ec2/delete-network-acl-entry.html
- https://docs.aws.amazon.com/AWSEC2/latest/APIReference/API_DeleteNetworkAclEntry.html
Tags:
- Domain: Cloud
- Data Source: AWS
- Data Source: Amazon Web Services
- Use Case: Network Security Monitoring
- Tactic: Defense Evasion
Version: 206
Rule authors:
- Elastic
Rule license: Elastic License v2
Investigation guide
editSetup
editThe AWS Fleet integration, Filebeat module, or similarly structured data is required to be compatible with this rule.
Rule query
editevent.dataset:aws.cloudtrail and event.provider:ec2.amazonaws.com and event.action:(DeleteNetworkAcl or DeleteNetworkAclEntry) and event.outcome:success
Framework: MITRE ATT&CKTM
-
Tactic:
- Name: Defense Evasion
- ID: TA0005
- Reference URL: https://attack.mitre.org/tactics/TA0005/
-
Technique:
- Name: Impair Defenses
- ID: T1562
- Reference URL: https://attack.mitre.org/techniques/T1562/
-
Sub-technique:
- Name: Disable or Modify Tools
- ID: T1562.001
- Reference URL: https://attack.mitre.org/techniques/T1562/001/