[metadata]
creation_date = "2023/08/24"
integration = ["endpoint"]
maturity = "production"
min_stack_comments = "New fields added: required_fields, related_integrations, setup"
min_stack_version = "8.3.0"
updated_date = "2023/08/24"

[rule]
author = ["Elastic"]
description = """
InstallUtil is a command-line utility that allows for installation and uninstallation of resources by executing specific
installer components specified in .NET binaries. Adversaries may use InstallUtil to proxy the execution of code through
a trusted Windows utility.
"""
from = "now-119m"
interval = "60m"
index = ["logs-endpoint.events.*"]
language = "eql"
license = "Elastic License v2"
name = "InstallUtil Activity"
risk_score = 21
rule_id = "90babaa8-5216-4568-992d-d4a01a105d98"
severity = "low"
tags = ["Domain: Endpoint", "OS: Windows", "Use Case: Threat Detection", "Tactic: Defense Evasion", "Data Source: Elastic Defend", "Rule Type: BBR"]
timestamp_override = "event.ingested"
building_block_type = "default"
type = "eql"

query = '''
process where host.os.type == "windows" and event.type == "start" and
  process.name : "installutil.exe" and not user.id : "S-1-5-18"
'''


[[rule.threat]]
framework = "MITRE ATT&CK"
[[rule.threat.technique]]
id = "T1218"
name = "System Binary Proxy Execution"
reference = "https://attack.mitre.org/techniques/T1218/"
[[rule.threat.technique.subtechnique]]
id = "T1218.004"
name = "InstallUtil"
reference = "https://attack.mitre.org/techniques/T1218/004/"



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