defense_evasion_execution_msbuild_started_renamed.toml

[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 after being renamed. This is uncommon behavior and may
indicate an attempt to run unnoticed or undetected.
"""
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 Using an Alternate Name"
risk_score = 21
rule_id = "9d110cb3-5f4b-4c9a-b9f5-53f0a1707ae4"
severity = "low"
tags = ["Elastic", "Host", "Windows", "Threat Detection", "Defense Evasion"]
timestamp_override = "event.ingested"
type = "eql"

query = '''
process where event.type in ("start", "process_started") and
  process.pe.original_file_name == "MSBuild.exe" and
  not process.name : "MSBuild.exe"
'''


[[rule.threat]]
framework = "MITRE ATT&CK"
[[rule.threat.technique]]
id = "T1036"
reference = "https://attack.mitre.org/techniques/T1036/"
name = "Masquerading"

  [[rule.threat.technique.subtechnique]]
  id = "T1036.003"
  name = "Rename System Utilities"
  reference = "https://attack.mitre.org/techniques/T1036/003/"


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