[metadata]
creation_date = "2023/08/23"
integration = ["endpoint"]
maturity = "production"
updated_date = "2024/05/21"

[rule]
author = ["Elastic"]
building_block_type = "default"
description = "Identifies activity related to loading kernel modules on Linux via creation of new ko files in the LKM directory.\n"
from = "now-119m"
index = ["logs-endpoint.events.*", "endgame-*"]
interval = "60m"
language = "eql"
license = "Elastic License v2"
name = "Creation of Kernel Module"
risk_score = 21
rule_id = "947827c6-9ed6-4dec-903e-c856c86e72f3"
severity = "low"
tags = [
    "Domain: Endpoint",
    "OS: Linux",
    "Use Case: Threat Detection",
    "Tactic: Persistence",
    "Rule Type: BBR",
    "Data Source: Elastic Defend",
    "Data Source: Elastic Endgame",
]
timestamp_override = "event.ingested"
type = "eql"

query = '''
file where host.os.type == "linux" and event.type in ("change", "creation") and file.path : "/lib/modules/*" and
file.extension == "ko" and not process.name : (
  "dpkg", "systemd", "falcon-sensor*", "dnf", "yum", "rpm", "cp"
)
'''


[[rule.threat]]
framework = "MITRE ATT&CK"
[[rule.threat.technique]]
id = "T1547"
name = "Boot or Logon Autostart Execution"
reference = "https://attack.mitre.org/techniques/T1547/"
[[rule.threat.technique.subtechnique]]
id = "T1547.006"
name = "Kernel Modules and Extensions"
reference = "https://attack.mitre.org/techniques/T1547/006/"



[rule.threat.tactic]
id = "TA0003"
name = "Persistence"
reference = "https://attack.mitre.org/tactics/TA0003/"