[metadata]
creation_date = "2020/08/19"
maturity = "production"
updated_date = "2020/11/03"

[rule]
author = ["Elastic"]
description = "Identifies a suspicious child process of the Windows virtual system process, which could indicate code injection."
from = "now-9m"
index = ["winlogbeat-*", "logs-endpoint.events.*"]
language = "kuery"
license = "Elastic License"
name = "Unusual Child Process from a System Virtual Process"
risk_score = 73
rule_id = "de9bd7e0-49e9-4e92-a64d-53ade2e66af1"
severity = "high"
tags = ["Elastic", "Host", "Windows", "Threat Detection", "Defense Evasion"]
type = "query"

query = '''
event.category:process and event.type:(start or process_started) and
  process.parent.pid:4 and
  not process.executable:(Registry or MemCompression or "C:\Windows\System32\smss.exe")
'''


[[rule.threat]]
framework = "MITRE ATT&CK"
[[rule.threat.technique]]
id = "T1055"
name = "Process Injection"
reference = "https://attack.mitre.org/techniques/T1055/"


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

