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
57 lines
1.8 KiB
TOML
57 lines
1.8 KiB
TOML
[metadata]
|
|
creation_date = "2022/01/31"
|
|
maturity = "production"
|
|
updated_date = "2022/03/31"
|
|
|
|
[rule]
|
|
author = ["Elastic"]
|
|
description = """
|
|
Identifies attempts to disable PowerShell Script Block Logging via registry modification. Attackers may disable this
|
|
logging to conceal their activities in the host and evade detection.
|
|
"""
|
|
from = "now-9m"
|
|
index = ["winlogbeat-*", "logs-endpoint.events.*", "logs-windows.*"]
|
|
language = "eql"
|
|
license = "Elastic License v2"
|
|
name = "PowerShell Script Block Logging Disabled"
|
|
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.
|
|
"""
|
|
references = [
|
|
"https://admx.help/?Category=Windows_10_2016&Policy=Microsoft.Policies.PowerShell::EnableScriptBlockLogging",
|
|
]
|
|
risk_score = 47
|
|
rule_id = "818e23e6-2094-4f0e-8c01-22d30f3506c6"
|
|
severity = "medium"
|
|
tags = ["Elastic", "Host", "Windows", "Threat Detection", "Defense Evasion"]
|
|
timestamp_override = "event.ingested"
|
|
type = "eql"
|
|
|
|
query = '''
|
|
registry where event.type == "change" and
|
|
registry.path :
|
|
"HKLM\\SOFTWARE\\Policies\\Microsoft\\Windows\\PowerShell\\ScriptBlockLogging\\EnableScriptBlockLogging"
|
|
and registry.data.strings : ("0", "0x00000000")
|
|
'''
|
|
|
|
|
|
[[rule.threat]]
|
|
framework = "MITRE ATT&CK"
|
|
[[rule.threat.technique]]
|
|
id = "T1562"
|
|
name = "Impair Defenses"
|
|
reference = "https://attack.mitre.org/techniques/T1562/"
|
|
[[rule.threat.technique.subtechnique]]
|
|
id = "T1562.002"
|
|
name = "Disable Windows Event Logging"
|
|
reference = "https://attack.mitre.org/techniques/T1562/002/"
|
|
|
|
|
|
|
|
[rule.threat.tactic]
|
|
id = "TA0005"
|
|
name = "Defense Evasion"
|
|
reference = "https://attack.mitre.org/tactics/TA0005/"
|
|
|