Azure Full Network Packet Capture Detected

 1[metadata]
 2creation_date = "2021/08/12"
 3integration = ["azure"]
 4maturity = "production"
 5min_stack_comments = "New fields added: required_fields, related_integrations, setup"
 6min_stack_version = "8.3.0"
 7updated_date = "2023/06/28"
 8
 9[rule]
10author = ["Austin Songer"]
11description = """
12Identifies potential full network packet capture in Azure. Packet Capture is an Azure Network Watcher feature that can
13be used to inspect network traffic. This feature can potentially be abused to read sensitive data from unencrypted
14internal traffic.
15"""
16false_positives = [
17    """
18    Full Network Packet Capture may be done by a system or network administrator. Verify whether the user identity, user
19    agent, and/or hostname should be making changes in your environment. Full Network Packet Capture from unfamiliar
20    users or hosts should be investigated. If known behavior is causing false positives, it can be exempted from the
21    rule.
22    """,
23]
24from = "now-25m"
25index = ["filebeat-*", "logs-azure*"]
26language = "kuery"
27license = "Elastic License v2"
28name = "Azure Full Network Packet Capture Detected"
29note = """## Setup
30
31The Azure Fleet integration, Filebeat module, or similarly structured data is required to be compatible with this rule."""
32references = ["https://docs.microsoft.com/en-us/azure/role-based-access-control/resource-provider-operations"]
33risk_score = 47
34rule_id = "3ad77ed4-4dcf-4c51-8bfc-e3f7ce316b2f"
35severity = "medium"
36tags = ["Domain: Cloud", "Data Source: Azure", "Tactic: Credential Access"]
37timestamp_override = "event.ingested"
38type = "query"
39
40query = '''
41event.dataset:azure.activitylogs and azure.activitylogs.operation_name:
42    (
43        MICROSOFT.NETWORK/*/STARTPACKETCAPTURE/ACTION or
44        MICROSOFT.NETWORK/*/VPNCONNECTIONS/STARTPACKETCAPTURE/ACTION or
45        MICROSOFT.NETWORK/*/PACKETCAPTURES/WRITE
46    ) and
47event.outcome:(Success or success)
48'''
49
50
51[[rule.threat]]
52framework = "MITRE ATT&CK"
53[[rule.threat.technique]]
54id = "T1040"
55name = "Network Sniffing"
56reference = "https://attack.mitre.org/techniques/T1040/"
57
58
59[rule.threat.tactic]
60id = "TA0006"
61name = "Credential Access"
62reference = "https://attack.mitre.org/tactics/TA0006/"