Azure Full Network Packet Capture Detected

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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.

Rule type: query

Rule indices:

  • filebeat-*
  • logs-azure*

Severity: medium

Risk score: 47

Runs every: 5m

Searches indices from: now-25m (Date Math format, see also Additional look-back time)

Maximum alerts per execution: 100

References:

Tags:

  • Domain: Cloud
  • Data Source: Azure
  • Tactic: Credential Access

Version: 103

Rule authors:

  • Austin Songer

Rule license: Elastic License v2

Investigation guide

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Rule query

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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)

Framework: MITRE ATT&CKTM