sigma-rules/rules/windows/persistence_time_provider_mod.toml

[metadata]
creation_date = "2021/01/19"
integration = ["endpoint"]
maturity = "production"
min_stack_comments = "New fields added: required_fields, related_integrations, setup"
min_stack_version = "8.3.0"
updated_date = "2023/03/06"

[rule]
author = ["Elastic"]
description = """
Identifies modification of the Time Provider. Adversaries may establish persistence by registering and enabling a
malicious DLL as a time provider. Windows uses the time provider architecture to obtain accurate time stamps from other
network devices or clients in the network. Time providers are implemented in the form of a DLL file which resides in the
System32 folder. The service W32Time initiates during the startup of Windows and loads w32time.dll.
"""
from = "now-9m"
index = ["logs-endpoint.events.*", "endgame-*"]
language = "eql"
license = "Elastic License v2"
name = "Potential Persistence via Time Provider Modification"
references = ["https://pentestlab.blog/2019/10/22/persistence-time-providers/"]
risk_score = 47
rule_id = "14ed1aa9-ebfd-4cf9-a463-0ac59ec55204"
severity = "medium"
tags = ["Elastic", "Host", "Windows", "Threat Detection", "Persistence", "Elastic Endgame"]
timestamp_override = "event.ingested"
type = "eql"

query = '''
registry where host.os.type == "windows" and event.type:"change" and
  registry.path: (
    "HKLM\\SYSTEM\\*ControlSet*\\Services\\W32Time\\TimeProviders\\*",
    "\\REGISTRY\\MACHINE\\SYSTEM\\*ControlSet*\\Services\\W32Time\\TimeProviders\\*"
  ) and
  registry.data.strings:"*.dll"
'''


[[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 = "T1547.003"
name = "Time Providers"
reference = "https://attack.mitre.org/techniques/T1547/003/"



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