defense_evasion_waf_acl_deletion.toml

[metadata]
creation_date = "2020/05/21"
integration = ["aws"]
maturity = "production"
updated_date = "2024/05/21"

[rule]
author = ["Elastic"]
description = "Identifies the deletion of a specified AWS Web Application Firewall (WAF) access control list."
false_positives = [
    """
    Firewall ACL's 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. Web ACL deletions by unfamiliar users or hosts should
    be investigated. If known behavior is causing false positives, it can be exempted from the rule.
    """,
]
from = "now-60m"
index = ["filebeat-*", "logs-aws.cloudtrail-*"]
interval = "10m"
language = "kuery"
license = "Elastic License v2"
name = "AWS WAF Access Control List Deletion"
note = """## Setup

The AWS Fleet integration, Filebeat module, or similarly structured data is required to be compatible with this rule."""
references = [
    "https://awscli.amazonaws.com/v2/documentation/api/latest/reference/waf-regional/delete-web-acl.html",
    "https://docs.aws.amazon.com/waf/latest/APIReference/API_wafRegional_DeleteWebACL.html",
]
risk_score = 47
rule_id = "91d04cd4-47a9-4334-ab14-084abe274d49"
severity = "medium"
tags = [
    "Domain: Cloud",
    "Data Source: AWS",
    "Data Source: Amazon Web Services",
    "Use Case: Network Security Monitoring",
    "Tactic: Defense Evasion",
]
timestamp_override = "event.ingested"
type = "query"

query = '''
event.dataset:aws.cloudtrail and event.action:DeleteWebACL and event.outcome:success
'''


[[rule.threat]]
framework = "MITRE ATT&CK"
[[rule.threat.technique]]
id = "T1562"
name = "Impair Defenses"
reference = "https://attack.mitre.org/techniques/T1562/"
[[rule.threat.technique.subtechnique]]
id = "T1562.001"
name = "Disable or Modify Tools"
reference = "https://attack.mitre.org/techniques/T1562/001/"



[rule.threat.tactic]
id = "TA0005"
name = "Defense Evasion"
reference = "https://attack.mitre.org/tactics/TA0005/"