sigma-rules/rules/windows/persistence_startup_folder_scripts.toml

[metadata]
creation_date = "2020/11/18"
maturity = "production"
updated_date = "2022/03/31"

[rule]
author = ["Elastic"]
description = "Identifies script engines creating files in the startup folder, or the creation of script files in the startup folder."
from = "now-9m"
index = ["winlogbeat-*", "logs-endpoint.events.*", "logs-windows.*"]
language = "eql"
license = "Elastic License v2"
name = "Persistent Scripts in the Startup Directory"
note = """## Config

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.
"""
risk_score = 47
rule_id = "f7c4dc5a-a58d-491d-9f14-9b66507121c0"
severity = "medium"
tags = ["Elastic", "Host", "Windows", "Threat Detection", "Persistence"]
timestamp_override = "event.ingested"
type = "eql"

query = '''
file where event.type != "deletion" and user.domain != "NT AUTHORITY" and
  
  /* detect shortcuts created by wscript.exe or cscript.exe */
  (file.path : "C:\\*\\Programs\\Startup\\*.lnk" and
     process.name : ("wscript.exe", "cscript.exe")) or

  /* detect vbs or js files created by any process */
  file.path : ("C:\\*\\Programs\\Startup\\*.vbs", 
               "C:\\*\\Programs\\Startup\\*.vbe", 
               "C:\\*\\Programs\\Startup\\*.wsh", 
               "C:\\*\\Programs\\Startup\\*.wsf", 
               "C:\\*\\Programs\\Startup\\*.js")
'''


[[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 = "T1547.001"
name = "Registry Run Keys / Startup Folder"
reference = "https://attack.mitre.org/techniques/T1547/001/"



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