command_and_control_tunneling_via_earthworm.toml

[metadata]
creation_date = "2021/04/12"
integration = ["endpoint"]
maturity = "production"
min_stack_comments = "New fields added: required_fields, related_integrations, setup"
min_stack_version = "8.3.0"
updated_date = "2023/02/22"

[rule]
author = ["Elastic"]
description = """
Identifies the execution of the EarthWorm tunneler. Adversaries may tunnel network communications to and from a victim
system within a separate protocol to avoid detection and network filtering, or to enable access to otherwise unreachable
systems.
"""
from = "now-9m"
index = ["auditbeat-*", "logs-endpoint.events.*", "endgame-*"]
language = "eql"
license = "Elastic License v2"
name = "Potential Protocol Tunneling via EarthWorm"
note = """## Setup

If enabling an EQL rule on a non-elastic-agent index (such as beats) for versions <8.2, events will not define `event.ingested` and default fallback for EQL rules was not added until 8.2, so you will need to add a custom pipeline to populate `event.ingested` to @timestamp for this rule to work.
"""
references = [
    "http://rootkiter.com/EarthWorm/",
    "https://decoded.avast.io/luigicamastra/apt-group-targeting-governmental-agencies-in-east-asia/",
]
risk_score = 47
rule_id = "9f1c4ca3-44b5-481d-ba42-32dc215a2769"
severity = "medium"
tags = ["Elastic", "Host", "Linux", "Threat Detection", "Command and Control", "Elastic Endgame"]
timestamp_override = "event.ingested"
type = "eql"

query = '''
process where host.os.type == "linux" and event.type == "start" and
 process.args : "-s" and process.args : "-d" and process.args : "rssocks"
'''


[[rule.threat]]
framework = "MITRE ATT&CK"
[[rule.threat.technique]]
id = "T1572"
name = "Protocol Tunneling"
reference = "https://attack.mitre.org/techniques/T1572/"


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