Azure Frontdoor Web Application Firewall (WAF) Policy Deleted

 1[metadata]
 2creation_date = "2021/08/01"
 3integration = ["azure"]
 4maturity = "production"
 5min_stack_comments = "New fields added: required_fields, related_integrations, setup"
 6min_stack_version = "8.3.0"
 7updated_date = "2023/06/22"
 8
 9[rule]
10author = ["Austin Songer"]
11description = """
12Identifies the deletion of a Frontdoor Web Application Firewall (WAF) Policy in Azure. An adversary may delete a
13Frontdoor Web Application Firewall (WAF) Policy in an attempt to evade defenses and/or to eliminate barriers to their
14objective.
15"""
16false_positives = [
17    """
18    Azure Front Web Application Firewall (WAF) Policy deletions may be done by a system or network administrator. Verify
19    whether the username, hostname, and/or resource name should be making changes in your environment. Azure Front Web
20    Application Firewall (WAF) Policy deletions by unfamiliar users or hosts should be investigated. If known behavior
21    is causing false positives, it can be exempted from the rule.
22    """,
23]
24from = "now-25m"
25index = ["filebeat-*", "logs-azure*"]
26language = "kuery"
27license = "Elastic License v2"
28name = "Azure Frontdoor Web Application Firewall (WAF) Policy Deleted"
29note = """## Setup
30
31The Azure Fleet integration, Filebeat module, or similarly structured data is required to be compatible with this rule."""
32references = [
33    "https://docs.microsoft.com/en-us/azure/role-based-access-control/resource-provider-operations#networking",
34]
35risk_score = 21
36rule_id = "09d028a5-dcde-409f-8ae0-557cef1b7082"
37severity = "low"
38tags = ["Domain: Cloud", "Data Source: Azure", "Use Case: Network Security Monitoring", "Tactic: Defense Evasion"]
39timestamp_override = "event.ingested"
40type = "query"
41
42query = '''
43event.dataset:azure.activitylogs and azure.activitylogs.operation_name:"MICROSOFT.NETWORK/FRONTDOORWEBAPPLICATIONFIREWALLPOLICIES/DELETE" and event.outcome:(Success or success)
44'''
45
46
47[[rule.threat]]
48framework = "MITRE ATT&CK"
49[[rule.threat.technique]]
50id = "T1562"
51name = "Impair Defenses"
52reference = "https://attack.mitre.org/techniques/T1562/"
53[[rule.threat.technique.subtechnique]]
54id = "T1562.001"
55name = "Disable or Modify Tools"
56reference = "https://attack.mitre.org/techniques/T1562/001/"
57
58
59
60[rule.threat.tactic]
61id = "TA0005"
62name = "Defense Evasion"
63reference = "https://attack.mitre.org/tactics/TA0005/"