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[New Rule] PowerShell Script Block Logging Disabled (#1749)

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* PowerShell Script Block Logging Disabled

* Update rules/windows/defense_evasion_disable_posh_scriptblocklogging.toml

Co-authored-by: Samirbous <64742097+Samirbous@users.noreply.github.com>

* Update defense_evasion_disable_posh_scriptblocklogging.toml

* Apply suggestions from code review

Co-authored-by: Justin Ibarra <brokensound77@users.noreply.github.com>

Co-authored-by: Samirbous <64742097+Samirbous@users.noreply.github.com>
Co-authored-by: Justin Ibarra <brokensound77@users.noreply.github.com>

(cherry picked from commit 7dac52f1cf)
This commit is contained in:
Jonhnathan
2022-02-04 15:44:27 -03:00
committed by github-actions[bot]
parent a884d8a237
commit 85f05f928b
1 changed files with 53 additions and 0 deletions
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rules/windows/defense_evasion_disable_posh_scriptblocklogging.toml
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[metadata]
creation_date = "2022/01/31"
maturity = "production"
updated_date = "2022/01/31"
[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"
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"
reference = "https://attack.mitre.org/techniques/T1562/"
name = "Impair Defenses"
[[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"
reference = "https://attack.mitre.org/tactics/TA0005/"
name = "Defense Evasion"