[metadata]
creation_date = "2024/09/09"
integration = ["endpoint", "windows", "sentinel_one_cloud_funnel", "m365_defender", "system", "crowdstrike"]
maturity = "production"
min_stack_comments = "Breaking change at 8.14.0 for the Windows Integration."
min_stack_version = "8.14.0"
updated_date = "2024/10/31"

[rule]
author = ["Elastic"]
description = """
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.
"""
from = "now-9m"
index = ["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*"]
language = "eql"
license = "Elastic License v2"
name = "Attempt to Establish VScode Remote Tunnel"
references = [
    "https://badoption.eu/blog/2023/01/31/code_c2.html",
    "https://code.visualstudio.com/docs/remote/tunnels"
]
risk_score = 47
rule_id = "0b96dfd8-5b8c-4485-9a1c-69ff7839786a"
severity = "medium"
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",
]
timestamp_override = "event.ingested"
type = "eql"

query = '''
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")
'''


[[rule.threat]]
framework = "MITRE ATT&CK"
[[rule.threat.technique]]
id = "T1219"
name = "Remote Access Software"
reference = "https://attack.mitre.org/techniques/T1219/"


[rule.threat.tactic]
id = "TA0011"
name = "Command and Control"
reference = "https://attack.mitre.org/tactics/TA0011/"