mirror of
https://github.com/valitydev/SigmaHQ.git
synced 2024-11-08 02:08:54 +00:00
27 lines
1.1 KiB
YAML
27 lines
1.1 KiB
YAML
title: Powershell Used To Disable Windows Defender AV Security Monitoring
|
|
id: a7ee1722-c3c5-aeff-3212-c777e4733217
|
|
status: experimental
|
|
description: Detects attackers attempting to disable Windows Defender using Powershell
|
|
author: 'ok @securonix invrep-de, oscd.community'
|
|
date: 2020/10/12
|
|
references:
|
|
- https://research.nccgroup.com/2020/06/23/wastedlocker-a-new-ransomware-variant-developed-by-the-evil-corp-group/
|
|
- https://rvsec0n.wordpress.com/2020/01/24/malwares-that-bypass-windows-defender/
|
|
tags:
|
|
- attack.defense_evasion
|
|
- attack.t1089 # legacy
|
|
- attack.t1562.001
|
|
logsource:
|
|
category: process_creation
|
|
product: windows
|
|
detection:
|
|
selection:
|
|
Image|endswith: '\powershell.exe'
|
|
CommandLine|contains:
|
|
- '-DisableBehaviorMonitoring $true'
|
|
- '-DisableRuntimeMonitoring $true'
|
|
condition: selection
|
|
falsepositives:
|
|
- 'Minimal, for some older versions of dev tools, such as pycharm, developers were known to sometimes disable Windows Defender to improve performance, but this generally is not considered a good security practice.'
|
|
level: high
|