[New Rule] Azure Full Network Packet Capture Detected (#1420)

* Create defense_evasion_virtual_network_device_modified.toml * Update defense_evasion_virtual_network_device_modified.toml * Update defense_evasion_virtual_network_device_modified.toml * Update defense_evasion_virtual_network_device_modified.toml * Update defense_evasion_virtual_network_device_modified.toml * Update defense_evasion_virtual_network_device_modified.toml * Delete defense_evasion_virtual_network_device_modified.toml * Create exfiltration_azure_full_network_packet_capture_detected.toml * Update exfiltration_azure_full_network_packet_capture_detected.toml * Update exfiltration_azure_full_network_packet_capture_detected.toml * Update exfiltration_azure_full_network_packet_capture_detected.toml * Update exfiltration_azure_full_network_packet_capture_detected.toml * Update exfiltration_azure_full_network_packet_capture_detected.toml * Update exfiltration_azure_full_network_packet_capture_detected.toml * Update exfiltration_azure_full_network_packet_capture_detected.toml * Update exfiltration_azure_full_network_packet_capture_detected.toml * Update rules/integrations/azure/exfiltration_azure_full_network_packet_capture_detected.toml Co-authored-by: Jonhnathan <jonhnathancesar@gmail.com> * Update rules/integrations/azure/exfiltration_azure_full_network_packet_capture_detected.toml Co-authored-by: Jonhnathan <jonhnathancesar@gmail.com> * Update exfiltration_azure_full_network_packet_capture_detected.toml * Update exfiltration_azure_full_network_packet_capture_detected.toml * Rename exfiltration_azure_full_network_packet_capture_detected.toml to credential_access_azure_full_network_packet_capture_detected.toml Co-authored-by: Justin Ibarra <brokensound77@users.noreply.github.com> Co-authored-by: Jonhnathan <jonhnathancesar@gmail.com>
2021-10-15 21:06:27 -05:00
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+[metadata]
+creation_date = "2021/08/12"
+maturity = "production"
+updated_date = "2021/10/15"
+integration = "azure"
+
+
+[rule]
+author = ["Austin Songer"]
+description = """
+Identifies potential full network packet capture in Azure. Packet Capture is an Azure Network Watcher feature that can
+be used to inspect network traffic. This feature can potentially be abused to read sensitive data from unencrypted
+internal traffic.
+"""
+false_positives = [
+    """
+    Full Network Packet Capture may be done by a system or network administrator. Verify whether the user identity, 
+    user agent, and/or hostname should be making changes in your environment. Full Network Packet Capture from unfamiliar
+    users or hosts should be investigated. If known behavior is causing false positives, it can be exempted from the rule.
+    """,
+]
+from = "now-25m"
+index = ["filebeat-*", "logs-azure*"]
+language = "kuery"
+license = "Elastic License v2"
+name = "Azure Full Network Packet Capture Detected"
+note = """## Config
+
+The Azure Fleet integration, Filebeat module, or similarly structured data is required to be compatible with this rule."""
+references = ["https://docs.microsoft.com/en-us/azure/role-based-access-control/resource-provider-operations"]
+risk_score = 47
+rule_id = "3ad77ed4-4dcf-4c51-8bfc-e3f7ce316b2f"
+tags = ["Elastic", "Cloud", "Azure", "Continuous Monitoring", "SecOps", "Monitoring"]
+severity = "medium"
+timestamp_override = "event.ingested"
+type = "query"
+
+query = '''
+event.dataset:azure.activitylogs and azure.activitylogs.operation_name:
+    (
+        "MICROSOFT.NETWORK/*/STARTPACKETCAPTURE/ACTION" or
+        "MICROSOFT.NETWORK/*/VPNCONNECTIONS/STARTPACKETCAPTURE/ACTION" or
+        "MICROSOFT.NETWORK/*/PACKETCAPTURES/WRITE"
+    ) and 
+event.outcome:(Success or success)
+'''
+
+
+
+[[rule.threat]]
+framework = "MITRE ATT&CK"
+[[rule.threat.technique]]
+reference = "https://attack.mitre.org/techniques/T1040/"
+name = "Network Sniffing"
+id = "T1040"
+
+
+[rule.threat.tactic]
+reference = "https://attack.mitre.org/tactics/TA0006/"
+name = "Credential Access"
+id = "TA0006"