Justin Ibarra
6bdfddac8e
* Expand timestamp_override tests * removed timestamp_override from eql sequence rules * add config entry for eql rules with beats index and t_o * add timestamp_override to missing fields
61 lines
2.0 KiB
TOML
Executable File
61 lines
2.0 KiB
TOML
Executable File
[metadata]
|
|
creation_date = "2020/03/25"
|
|
maturity = "production"
|
|
updated_date = "2022/03/31"
|
|
|
|
[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"
|
|
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 = "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", "pwsh.exe", "powershell_ise.exe", "cscript.exe", "wscript.exe", "mshta.exe")
|
|
'''
|
|
|
|
|
|
[[rule.threat]]
|
|
framework = "MITRE ATT&CK"
|
|
[[rule.threat.technique]]
|
|
id = "T1127"
|
|
name = "Trusted Developer Utilities Proxy Execution"
|
|
reference = "https://attack.mitre.org/techniques/T1127/"
|
|
[[rule.threat.technique.subtechnique]]
|
|
id = "T1127.001"
|
|
name = "MSBuild"
|
|
reference = "https://attack.mitre.org/techniques/T1127/001/"
|
|
|
|
|
|
|
|
[rule.threat.tactic]
|
|
id = "TA0005"
|
|
name = "Defense Evasion"
|
|
reference = "https://attack.mitre.org/tactics/TA0005/"
|
|
[[rule.threat]]
|
|
framework = "MITRE ATT&CK"
|
|
|
|
[rule.threat.tactic]
|
|
id = "TA0002"
|
|
name = "Execution"
|
|
reference = "https://attack.mitre.org/tactics/TA0002/"
|
|
|