sigma-rules/rules/windows/execution_script_executing_powershell.toml

[metadata]
creation_date = "2020/02/18"
maturity = "production"
updated_date = "2020/11/03"

[rule]
author = ["Elastic"]
description = """
Identifies a PowerShell process launched by either cscript.exe or wscript.exe. Observing Windows scripting processes
executing a PowerShell script, may be indicative of malicious activity.
"""
from = "now-9m"
index = ["winlogbeat-*", "logs-endpoint.events.*"]
language = "kuery"
license = "Elastic License"
name = "Windows Script Executing PowerShell"
risk_score = 21
rule_id = "f545ff26-3c94-4fd0-bd33-3c7f95a3a0fc"
severity = "low"
tags = ["Elastic", "Host", "Windows", "Threat Detection", "Execution"]
type = "query"

query = '''
event.category:process and event.type:(start or process_started) and
  process.parent.name:(cscript.exe or wscript.exe) and
  process.name:powershell.exe
'''


[[rule.threat]]
framework = "MITRE ATT&CK"
[[rule.threat.technique]]
id = "T1193"
name = "Spearphishing Attachment"
reference = "https://attack.mitre.org/techniques/T1193/"


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