Azure Firewall Policy Deletion
Identifies the deletion of a firewall policy in Azure. An adversary may delete a firewall policy in an attempt to evade defenses and/or to eliminate barriers to their objective.
Elastic rule (View on GitHub)
1[metadata]
2creation_date = "2020/08/18"
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 = ["Elastic"]
11description = """
12Identifies the deletion of a firewall policy in Azure. An adversary may delete a firewall policy in an attempt to evade
13defenses and/or to eliminate barriers to their objective.
14"""
15false_positives = [
16 """
17 Firewall policy deletions may be done by a system or network administrator. Verify whether the username, hostname,
18 and/or resource name should be making changes in your environment. Firewall policy deletions by unfamiliar users or
19 hosts should be investigated. If known behavior 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 Firewall Policy Deletion"
27note = """## Setup
28
29The Azure Fleet integration, Filebeat module, or similarly structured data is required to be compatible with this rule."""
30references = ["https://docs.microsoft.com/en-us/azure/firewall-manager/policy-overview"]
31risk_score = 21
32rule_id = "e02bd3ea-72c6-4181-ac2b-0f83d17ad969"
33severity = "low"
34tags = ["Domain: Cloud", "Data Source: Azure", "Use Case: Network Security Monitoring", "Tactic: Defense Evasion"]
35timestamp_override = "event.ingested"
36type = "query"
37
38query = '''
39event.dataset:azure.activitylogs and azure.activitylogs.operation_name:"MICROSOFT.NETWORK/FIREWALLPOLICIES/DELETE" and event.outcome:(Success or success)
40'''
41
42
43[[rule.threat]]
44framework = "MITRE ATT&CK"
45[[rule.threat.technique]]
46id = "T1562"
47name = "Impair Defenses"
48reference = "https://attack.mitre.org/techniques/T1562/"
49[[rule.threat.technique.subtechnique]]
50id = "T1562.001"
51name = "Disable or Modify Tools"
52reference = "https://attack.mitre.org/techniques/T1562/001/"
53
54
55
56[rule.threat.tactic]
57id = "TA0005"
58name = "Defense Evasion"
59reference = "https://attack.mitre.org/tactics/TA0005/"
Setup
The Azure Fleet integration, Filebeat module, or similarly structured data is required to be compatible with this rule.
References
Related rules
- Azure Frontdoor Web Application Firewall (WAF) Policy Deleted
- Azure Network Watcher Deletion
- Azure Alert Suppression Rule Created or Modified
- Azure Application Credential Modification
- Azure Automation Runbook Deleted