Azure Diagnostic Settings Deletion

 1[metadata]
 2creation_date = "2020/08/17"
 3integration = ["azure"]
 4maturity = "production"
 5updated_date = "2024/05/21"
 6
 7[rule]
 8author = ["Elastic"]
 9description = """
10Identifies the deletion of diagnostic settings in Azure, which send platform logs and metrics to different destinations.
11An adversary may delete diagnostic settings in an attempt to evade defenses.
12"""
13false_positives = [
14    """
15    Deletion of diagnostic settings may be done by a system or network administrator. Verify whether the username,
16    hostname, and/or resource name should be making changes in your environment. Diagnostic settings deletion from
17    unfamiliar users or hosts should be investigated. If known behavior is causing false positives, it can be exempted
18    from the rule.
19    """,
20]
21from = "now-25m"
22index = ["filebeat-*", "logs-azure*"]
23language = "kuery"
24license = "Elastic License v2"
25name = "Azure Diagnostic Settings Deletion"
26note = """## Setup
27
28The Azure Fleet integration, Filebeat module, or similarly structured data is required to be compatible with this rule."""
29references = ["https://docs.microsoft.com/en-us/azure/azure-monitor/platform/diagnostic-settings"]
30risk_score = 47
31rule_id = "5370d4cd-2bb3-4d71-abf5-1e1d0ff5a2de"
32severity = "medium"
33tags = ["Domain: Cloud", "Data Source: Azure", "Tactic: Defense Evasion"]
34timestamp_override = "event.ingested"
35type = "query"
36
37query = '''
38event.dataset:azure.activitylogs and azure.activitylogs.operation_name:"MICROSOFT.INSIGHTS/DIAGNOSTICSETTINGS/DELETE" and event.outcome:(Success or success)
39'''
40
41
42[[rule.threat]]
43framework = "MITRE ATT&CK"
44[[rule.threat.technique]]
45id = "T1562"
46name = "Impair Defenses"
47reference = "https://attack.mitre.org/techniques/T1562/"
48[[rule.threat.technique.subtechnique]]
49id = "T1562.001"
50name = "Disable or Modify Tools"
51reference = "https://attack.mitre.org/techniques/T1562/001/"
52
53
54
55[rule.threat.tactic]
56id = "TA0005"
57name = "Defense Evasion"
58reference = "https://attack.mitre.org/tactics/TA0005/"