[metadata]
creation_date = "2023/07/14"
integration = ["endpoint"]
maturity = "production"
min_stack_comments = "New fields added: required_fields, related_integrations, setup"
min_stack_version = "8.3.0"
updated_date = "2023/07/14"

[rule]
author = ["Elastic"]
description = """
This rule identifies the execution of unsigned executables via service control manager (SCM). Adversaries may abuse SCM
to execute malware or escalate privileges.
"""
from = "now-119m"
interval = "60m"
index = ["logs-endpoint.events.*"]
language = "eql"
license = "Elastic License v2"
name = "Execution of an Unsigned Service"
risk_score = 21
rule_id = "56fdfcf1-ca7c-4fd9-951d-e215ee26e404"
severity = "low"
tags = ["Domain: Endpoint", "OS: Windows", "Use Case: Threat Detection", "Tactic: Execution", "Rule Type: BBR", "Data Source: Elastic Defend"]
timestamp_override = "event.ingested"
building_block_type = "default"
type = "eql"

query = '''
process where host.os.type == "windows" and event.type == "start" and
( 
  (
    process.parent.executable : "C:\\Windows\\System32\\services.exe" and
    (process.code_signature.exists == false or process.code_signature.trusted == false)
  )
)
'''


[[rule.threat]]
framework = "MITRE ATT&CK"
[[rule.threat.technique]]
id = "T1569"
name = "System Services"
reference = "https://attack.mitre.org/techniques/T1569/"
[[rule.threat.technique.subtechnique]]
id = "T1569.002"
name = "Service Execution"
reference = "https://attack.mitre.org/techniques/T1569/002/"



[rule.threat.tactic]
id = "TA0002"
name = "Execution"
reference = "https://attack.mitre.org/tactics/TA0002/"