LoFP / waf rules or rule groups may be deleted by a system or network administrator. verify whether the user identity, user agent, and/or hostname should be making changes in your environment. rule deletions by unfamiliar users or hosts should be investigated. if known behavior is causing false positives, it can be exempted from the rule.

Techniques

• T1562

Sample rules

AWS WAF Rule or Rule Group Deletion

• source: elastic
• technicques:
  • T1562

Description

Identifies the deletion of a specified AWS Web Application Firewall (WAF) rule or rule group.

Detection logic

event.dataset:aws.cloudtrail and event.provider:(waf.amazonaws.com or waf-regional.amazonaws.com or wafv2.amazonaws.com) and event.action:(DeleteRule or DeleteRuleGroup) and event.outcome:success