discovery_linux_system_owner_user_discovery.toml

[metadata]
creation_date = "2023/07/10"
integration = ["endpoint", "auditd_manager"]
maturity = "production"
updated_date = "2024/05/21"

[rule]
author = ["Elastic"]
building_block_type = "default"
description = """
Identifies the use of built-in tools which adversaries may use to enumerate the system owner/user of a compromised
system.
"""
from = "now-119m"
index = ["logs-endpoint.events.*", "endgame-*", "auditbeat-*", "logs-auditd_manager.auditd-*"]
interval = "60m"
language = "eql"
license = "Elastic License v2"
name = "System Owner/User Discovery Linux"
risk_score = 21
rule_id = "bf8c007c-7dee-4842-8e9a-ee534c09d205"
severity = "low"
tags = [
    "Domain: Endpoint",
    "OS: Linux",
    "Use Case: Threat Detection",
    "Tactic: Discovery",
    "Rule Type: BBR",
    "Data Source: Elastic Defend",
    "Data Source: Elastic Endgame",
    "Data Source: Auditd Manager",
]
timestamp_override = "event.ingested"
type = "eql"

query = '''
process where event.type == "start" and event.action in ("exec", "exec_event", "executed", "process_started") and 
process.name : ("whoami", "w", "who", "users", "id")
'''


[[rule.threat]]
framework = "MITRE ATT&CK"
[[rule.threat.technique]]
id = "T1033"
name = "System Owner/User Discovery"
reference = "https://attack.mitre.org/techniques/T1033/"

[[rule.threat.technique]]
id = "T1069"
name = "Permission Groups Discovery"
reference = "https://attack.mitre.org/techniques/T1069/"


[rule.threat.tactic]
id = "TA0007"
name = "Discovery"
reference = "https://attack.mitre.org/tactics/TA0007/"