[metadata]
creation_date = "2020/08/14"
maturity = "production"
updated_date = "2020/11/03"

[rule]
author = ["Elastic"]
description = """
Identifies suspicious psexec activity which is executing from the psexec service that has been renamed, possibly to
evade detection.
"""
from = "now-9m"
index = ["winlogbeat-*", "logs-endpoint.events.*"]
language = "kuery"
license = "Elastic License"
name = "Suspicious Process Execution via Renamed PsExec Executable"
risk_score = 47
rule_id = "e2f9fdf5-8076-45ad-9427-41e0e03dc9c2"
severity = "medium"
tags = ["Elastic", "Host", "Windows", "Threat Detection", "Execution"]
type = "query"

query = '''
event.category:process and event.type:(start or process_started) and
  (process.pe.original_file_name:(psexesvc.exe or PSEXESVC.exe) or
     winlog.event_data.OriginalFileName:(psexesvc.exe or PSEXESVC.exe)) and
  process.parent.name:services.exe and
  not process.name:(psexesvc.exe or PSEXESVC.exe)
'''


[[rule.threat]]
framework = "MITRE ATT&CK"
[[rule.threat.technique]]
id = "T1035"
name = "Service Execution"
reference = "https://attack.mitre.org/techniques/T1035/"


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