detection.wiki

Detection rules › Sigma

Google Cloud VPN Tunnel Modified or Deleted

Status
test
Severity
medium
Log source
product gcp, service gcp.audit
Author
Austin Songer @austinsonger
Source
github.com/SigmaHQ/sigma

Identifies when a VPN Tunnel Modified or Deleted in Google Cloud.

Known false positives

  • VPN Tunnel being modified or deleted may be performed by a system administrator.
  • Verify whether the user identity, user agent, and/or hostname should be making changes in your environment.
  • VPN Tunnel modified or deleted from unfamiliar users should be investigated. If known behavior is causing false positives, it can be exempted from the rule.

MITRE ATT&CK coverage

TacticTechniques
ImpactNo specific technique

Telemetry coverage

PlatformRecord / event type
GCPcompute.vpnTunnels.delete: Delete VPN tunnel
GCPcompute.vpnTunnels.insert: Insert VPN tunnel

Rule body

title: Google Cloud VPN Tunnel Modified or Deleted
id: 99980a85-3a61-43d3-ac0f-b68d6b4797b1
status: test
description: Identifies when a VPN Tunnel Modified or Deleted in Google Cloud.
references:
    - https://any-api.com/googleapis_com/compute/docs/vpnTunnels
author: Austin Songer @austinsonger
date: 2021-08-16
modified: 2022-10-09
tags:
    - attack.impact
logsource:
    product: gcp
    service: gcp.audit
detection:
    selection:
        gcp.audit.method_name:
            - compute.vpnTunnels.insert
            - compute.vpnTunnels.delete
    condition: selection
falsepositives:
    - VPN Tunnel being modified or deleted may be performed by a system administrator.
    - Verify whether the user identity, user agent, and/or hostname should be making changes in your environment.
    - VPN Tunnel modified or deleted from unfamiliar users should be investigated. If known behavior is causing false positives, it can be exempted from the rule.
level: medium

Stages and Predicates

Stage 0: condition

selection

Stage 1: selection

selection:
    gcp.audit.method_name:
        - compute.vpnTunnels.insert
        - compute.vpnTunnels.delete

Indicators

These rows show field, operator, and value matches.

FieldKindValuesSearch
gcp.audit.method_nameeq
  • compute.vpnTunnels.delete
  • compute.vpnTunnels.insert
field:"gcp::method_name" kind:eq