[metadata]
creation_date = "2020/03/25"
maturity = "production"
updated_date = "2021/09/23"

[rule]
author = ["Elastic"]
description = """
An instance of MSBuild, the Microsoft Build Engine, was started by a script or the Windows command interpreter. This
behavior is unusual and is sometimes used by malicious payloads.
"""
false_positives = ["The Build Engine is commonly used by Windows developers but use by non-engineers is unusual."]
from = "now-9m"
index = ["winlogbeat-*", "logs-endpoint.events.*", "logs-windows.*"]
language = "eql"
license = "Elastic License v2"
name = "Microsoft Build Engine Started by a Script Process"
risk_score = 21
rule_id = "9d110cb3-5f4b-4c9a-b9f5-53f0a1707ae2"
severity = "low"
tags = ["Elastic", "Host", "Windows", "Threat Detection", "Defense Evasion"]
timestamp_override = "event.ingested"
type = "eql"

query = '''
process where event.type == "start" and
  (process.name : "MSBuild.exe" or process.pe.original_file_name == "MSBuild.exe") and
  process.parent.name : ("cmd.exe", "powershell.exe", "cscript.exe", "wscript.exe", "mshta.exe")
'''


[[rule.threat]]
framework = "MITRE ATT&CK"
[[rule.threat.technique]]
id = "T1127"
reference = "https://attack.mitre.org/techniques/T1127/"
name = "Trusted Developer Utilities Proxy Execution"

  [[rule.threat.technique.subtechnique]]
  id = "T1127.001"
  name = "MSBuild"
  reference = "https://attack.mitre.org/techniques/T1127/001/"


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

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