Attempt to Establish VScode Remote Tunnel

Detects the execution of the VScode portable binary with the tunnel command line option indicating an attempt to establish a remote tunnel session to Github or a remote VScode instance.

Rule type: eql

Rule indices:

logs-endpoint.events.process-*
winlogbeat-*
logs-windows.sysmon_operational-*
logs-system.security*
endgame-*
logs-sentinel_one_cloud_funnel.*
logs-m365_defender.event-*
logs-crowdstrike.fdr*

Severity: medium

Risk score: 47

Runs every: 5m

Searches indices from: now-9m (Date Math format, see also Additional look-back time)

Maximum alerts per execution: 100

References:

Tags:

Domain: Endpoint
OS: Windows
Use Case: Threat Detection
Tactic: Command and Control
Data Source: Elastic Endgame
Data Source: Elastic Defend
Data Source: Sysmon
Data Source: SentinelOne
Data Source: Microsoft Defender for Endpoint
Data Source: System
Data Source: Crowdstrike

Version: 104

Rule authors:

Elastic

Rule license: Elastic License v2

Rule query

edit

process where host.os.type == "windows" and event.type == "start" and
  process.args : "tunnel" and (process.args : "--accept-server-license-terms" or process.name : "code*.exe") and
  not (process.name == "code-tunnel.exe" and process.args == "status" and process.parent.name == "Code.exe")

Framework: MITRE ATT&CK^TM

Tactic:
- Name: Command and Control
- ID: TA0011
- Reference URL: https://attack.mitre.org/tactics/TA0011/
Technique:
- Name: Remote Access Software
- ID: T1219
- Reference URL: https://attack.mitre.org/techniques/T1219/

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