Azure Frontdoor Web Application Firewall (WAF) Policy Deleted

 1[metadata]
 2creation_date = "2021/08/01"
 3integration = ["azure"]
 4maturity = "production"
 5updated_date = "2024/05/21"
 6
 7[rule]
 8author = ["Austin Songer"]
 9description = """
10Identifies the deletion of a Frontdoor Web Application Firewall (WAF) Policy in Azure. An adversary may delete a
11Frontdoor Web Application Firewall (WAF) Policy in an attempt to evade defenses and/or to eliminate barriers to their
12objective.
13"""
14false_positives = [
15    """
16    Azure Front Web Application Firewall (WAF) Policy deletions may be done by a system or network administrator. Verify
17    whether the username, hostname, and/or resource name should be making changes in your environment. Azure Front Web
18    Application Firewall (WAF) Policy deletions by unfamiliar users or hosts should be investigated. If known behavior
19    is causing false positives, it can be exempted from the rule.
20    """,
21]
22from = "now-25m"
23index = ["filebeat-*", "logs-azure*"]
24language = "kuery"
25license = "Elastic License v2"
26name = "Azure Frontdoor Web Application Firewall (WAF) Policy Deleted"
27note = """## Setup
28
29The Azure Fleet integration, Filebeat module, or similarly structured data is required to be compatible with this rule."""
30references = [
31    "https://docs.microsoft.com/en-us/azure/role-based-access-control/resource-provider-operations#networking",
32]
33risk_score = 21
34rule_id = "09d028a5-dcde-409f-8ae0-557cef1b7082"
35severity = "low"
36tags = [
37    "Domain: Cloud",
38    "Data Source: Azure",
39    "Use Case: Network Security Monitoring",
40    "Tactic: Defense Evasion",
41]
42timestamp_override = "event.ingested"
43type = "query"
44
45query = '''
46event.dataset:azure.activitylogs and azure.activitylogs.operation_name:"MICROSOFT.NETWORK/FRONTDOORWEBAPPLICATIONFIREWALLPOLICIES/DELETE" and event.outcome:(Success or success)
47'''
48
49
50[[rule.threat]]
51framework = "MITRE ATT&CK"
52[[rule.threat.technique]]
53id = "T1562"
54name = "Impair Defenses"
55reference = "https://attack.mitre.org/techniques/T1562/"
56[[rule.threat.technique.subtechnique]]
57id = "T1562.001"
58name = "Disable or Modify Tools"
59reference = "https://attack.mitre.org/techniques/T1562/001/"
60
61
62
63[rule.threat.tactic]
64id = "TA0005"
65name = "Defense Evasion"
66reference = "https://attack.mitre.org/tactics/TA0005/"