sigma-rules/rules/windows/execution_command_shell_started_by_powershell.toml

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

[rule]
author = ["Elastic"]
description = "Identifies a suspicious parent child process relationship with cmd.exe descending from PowerShell.exe."
from = "now-9m"
index = ["winlogbeat-*", "logs-endpoint.events.*"]
language = "kuery"
license = "Elastic License"
name = "PowerShell spawning Cmd"
risk_score = 21
rule_id = "0f616aee-8161-4120-857e-742366f5eeb3"
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:powershell.exe and process.name:cmd.exe
'''


[[rule.threat]]
framework = "MITRE ATT&CK"
[[rule.threat.technique]]
id = "T1059"
name = "Command and Scripting Interpreter"
reference = "https://attack.mitre.org/techniques/T1059/"

[[rule.threat.technique]]
id = "T1086"
name = "PowerShell"
reference = "https://attack.mitre.org/techniques/T1086/"

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