discovery_admin_recon.toml

[metadata]
creation_date = "2020/12/04"
maturity = "production"
updated_date = "2021/09/23"

[rule]
author = ["Elastic"]
description = """
Identifies instances of lower privilege accounts enumerating Administrator accounts or groups using built-in Windows
tools.
"""
from = "now-9m"
index = ["logs-endpoint.events.*", "winlogbeat-*", "logs-windows.*"]
language = "eql"
license = "Elastic License v2"
name = "Enumeration of Administrator Accounts"
risk_score = 21
rule_id = "871ea072-1b71-4def-b016-6278b505138d"
severity = "low"
tags = ["Elastic", "Host", "Windows", "Threat Detection", "Discovery"]
timestamp_override = "event.ingested"
type = "eql"

query = '''
process where event.type in ("start", "process_started") and
  (((process.name : "net.exe" or process.pe.original_file_name == "net.exe") or
    ((process.name : "net1.exe" or process.pe.original_file_name == "net1.exe") and
        not process.parent.name : "net.exe")) and
   process.args : ("group", "user", "localgroup") and
   process.args : ("admin", "Domain Admins", "Remote Desktop Users", "Enterprise Admins", "Organization Management") and
   not process.args : "/add")

   or

  ((process.name : "wmic.exe" or process.pe.original_file_name == "wmic.exe") and
     process.args : ("group", "useraccount"))
'''


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

  [[rule.threat.technique.subtechnique]]
  id = "T1069.002"
  name = "Domain Groups"
  reference = "https://attack.mitre.org/techniques/T1069/002/"

[[rule.threat.technique]]
id = "T1087"
name = "Account Discovery"
reference = "https://attack.mitre.org/techniques/T1087/"


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