sigma-rules/rules/windows/execution_command_shell_started_by_svchost.toml

[metadata]
creation_date = "2020/02/18"
maturity = "production"
updated_date = "2022/03/31"

[rule]
author = ["Elastic"]
description = "Identifies a suspicious parent child process relationship with cmd.exe descending from svchost.exe"
from = "now-9m"
index = ["winlogbeat-*", "logs-endpoint.events.*", "logs-windows.*"]
language = "eql"
license = "Elastic License v2"
name = "Svchost spawning Cmd"
note = """## Config

If enabling an EQL rule on a non-elastic-agent index (such as beats) for versions <8.2, events will not define `event.ingested` and default fallback for EQL rules was not added until 8.2, so you will need to add a custom pipeline to populate `event.ingested` to @timestamp for this rule to work.
"""
risk_score = 21
rule_id = "fd7a6052-58fa-4397-93c3-4795249ccfa2"
severity = "low"
tags = ["Elastic", "Host", "Windows", "Threat Detection", "Execution"]
timestamp_override = "event.ingested"
type = "eql"

query = '''
process where event.type == "start" and
  process.parent.name : "svchost.exe" and process.name : "cmd.exe" and 
  not (process.pe.original_file_name : "cmd.exe" and process.args : (
    "??:\\Program Files\\Npcap\\CheckStatus.bat?",
    "?:\\Program Files\\Npcap\\CheckStatus.bat",
    "\\system32\\cleanmgr.exe",
    "?:\\Windows\\system32\\silcollector.cmd",
    "\\system32\\AppHostRegistrationVerifier.exe",
    "\\system32\\ServerManagerLauncher.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.tactic]
id = "TA0002"
name = "Execution"
reference = "https://attack.mitre.org/tactics/TA0002/"