Azure Network Watcher Deletion

 1[metadata]
 2creation_date = "2020/08/31"
 3integration = ["azure"]
 4maturity = "production"
 5updated_date = "2024/05/21"
 6
 7[rule]
 8author = ["Elastic"]
 9description = """
10Identifies the deletion of a Network Watcher in Azure. Network Watchers are used to monitor, diagnose, view metrics, and
11enable or disable logs for resources in an Azure virtual network. An adversary may delete a Network Watcher in an
12attempt to evade defenses.
13"""
14false_positives = [
15    """
16    Network Watcher deletions may be done by a system or network administrator. Verify whether the username, hostname,
17    and/or resource name should be making changes in your environment. Network Watcher deletions by unfamiliar users or
18    hosts should be investigated. If known behavior is causing false positives, it can be exempted from the rule.
19    """,
20]
21from = "now-25m"
22index = ["filebeat-*", "logs-azure*"]
23language = "kuery"
24license = "Elastic License v2"
25name = "Azure Network Watcher 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/network-watcher/network-watcher-monitoring-overview"]
30risk_score = 47
31rule_id = "323cb487-279d-4218-bcbd-a568efe930c6"
32severity = "medium"
33tags = [
34    "Domain: Cloud",
35    "Data Source: Azure",
36    "Use Case: Network Security Monitoring",
37    "Tactic: Defense Evasion",
38]
39timestamp_override = "event.ingested"
40type = "query"
41
42query = '''
43event.dataset:azure.activitylogs and azure.activitylogs.operation_name:"MICROSOFT.NETWORK/NETWORKWATCHERS/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/"