Google Full Network Traffic Packet Capture — Sigma Rule

Rule metadata and linked tags

Author: Austin Songer @austinsonger. Source status: test; severity: medium. Source dates: 2021-08-13 / 2022-10-09.

{
  "product": "gcp",
  "service": "gcp.audit"
}

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: bb72ea3cafbadfb77f9e133bf9f6d6ad44ec59df741584a50241672c8de5b4c9

Detection logic

Original source YAML. Source-tag agreement is not proof of complete semantic coverage. This rule has not been compiled for a SIEM backend or validated against live telemetry here.

title: Google Full Network Traffic Packet Capture
id: 980a7598-1e7f-4962-9372-2d754c930d0e
status: test
description: Identifies potential full network packet capture in gcp. This feature can potentially be abused to read sensitive data from unencrypted internal traffic.
references:
    - https://cloud.google.com/kubernetes-engine/docs/how-to/audit-logging
    - https://developers.google.com/resources/api-libraries/documentation/compute/v1/java/latest/com/google/api/services/compute/Compute.PacketMirrorings.html
author: Austin Songer @austinsonger
date: 2021-08-13
modified: 2022-10-09
tags:
    - attack.collection
    - attack.t1074
logsource:
    product: gcp
    service: gcp.audit
detection:
    selection:
        gcp.audit.method_name:
            - v*.Compute.PacketMirrorings.Get
            - v*.Compute.PacketMirrorings.Delete
            - v*.Compute.PacketMirrorings.Insert
            - v*.Compute.PacketMirrorings.Patch
            - v*.Compute.PacketMirrorings.List
            - v*.Compute.PacketMirrorings.aggregatedList
    condition: selection
falsepositives:
    - Full Network Packet Capture may be done by a system or network administrator.
    - If known behavior is causing false positives, it can be exempted from the rule.
level: medium

Original YAML and metadata in JSON

False positives

• Full Network Packet Capture may be done by a system or network administrator.
• If known behavior is causing false positives, it can be exempted from the rule.

Source references

• https://cloud.google.com/kubernetes-engine/docs/how-to/audit-logging
• https://developers.google.com/resources/api-libraries/documentation/compute/v1/java/latest/com/google/api/services/compute/Compute.PacketMirrorings.html