[metadata]
creation_date = "2023/08/29"
integration = ["endpoint"]
maturity = "production"
updated_date = "2024/05/21"

[rule]
author = ["Elastic"]
description = """
Identifies the registration of a Werfault Debugger. Attackers may abuse this mechanism to execute malicious payloads
every time the utility is executed with the "-pr" parameter.
"""
from = "now-9m"
index = ["logs-endpoint.events.registry-*", "endgame-*"]
language = "eql"
license = "Elastic License v2"
name = "Werfault ReflectDebugger Persistence"
references = ["https://cocomelonc.github.io/malware/2022/11/02/malware-pers-18.html"]
risk_score = 21
rule_id = "205b52c4-9c28-4af4-8979-935f3278d61a"
severity = "low"
tags = [
    "Domain: Endpoint",
    "OS: Windows",
    "Use Case: Threat Detection",
    "Tactic: Persistence",
    "Data Source: Elastic Endgame",
    "Data Source: Elastic Defend",
]
timestamp_override = "event.ingested"
type = "eql"

query = '''
registry where host.os.type == "windows" and event.type == "change" and
  registry.path : (
    "HKLM\\Software\\Microsoft\\Windows\\Windows Error Reporting\\Hangs\\ReflectDebugger",
    "\\REGISTRY\\MACHINE\\Software\\Microsoft\\Windows\\Windows Error Reporting\\Hangs\\ReflectDebugger"
  )
'''


[[rule.threat]]
framework = "MITRE ATT&CK"
[[rule.threat.technique]]
id = "T1546"
name = "Event Triggered Execution"
reference = "https://attack.mitre.org/techniques/T1546/"


[rule.threat.tactic]
id = "TA0003"
name = "Persistence"
reference = "https://attack.mitre.org/tactics/TA0003/"
[[rule.threat]]
framework = "MITRE ATT&CK"
[[rule.threat.technique]]
id = "T1112"
name = "Modify Registry"
reference = "https://attack.mitre.org/techniques/T1112/"


[rule.threat.tactic]
id = "TA0005"
name = "Defense Evasion"
reference = "https://attack.mitre.org/tactics/TA0005/"