Azure Full Network Packet Capture Detected
editAzure Full Network Packet Capture Detected
editIdentifies 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.
Rule type: query
Rule indices:
- filebeat-*
- logs-azure*
Severity: medium
Risk score: 47
Runs every: 5 minutes
Searches indices from: now-25m (Date Math format, see also Additional look-back time)
Maximum alerts per execution: 100
References:
Tags:
- Elastic
- Cloud
- Azure
- Continuous Monitoring
- SecOps
- Monitoring
Version: 3 (version history)
Added (Elastic Stack release): 7.16.0
Last modified (Elastic Stack release): 8.4.0
Rule authors: Austin Songer
Rule license: Elastic License v2
Potential false positives
editFull 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.
Investigation guide
editRule query
editevent.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)
Threat mapping
editFramework: MITRE ATT&CKTM
-
Tactic:
- Name: Credential Access
- ID: TA0006
- Reference URL: https://attack.mitre.org/tactics/TA0006/
-
Technique:
- Name: Network Sniffing
- ID: T1040
- Reference URL: https://attack.mitre.org/techniques/T1040/
Rule version history
edit- Version 3 (8.4.0 release)
-
-
Updated query, changed from:
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)
-