PUA - DefenderCheck Execution
Detects the use of DefenderCheck, a tool to evaluate the signatures used in Microsoft Defender. It can be used to figure out the strings / byte chains used in Microsoft Defender to detect a tool and thus used for AV evasion.
Detection logic
selection
- Image|endswith: \DefenderCheck.exe
- Description: DefenderCheckCondition
selectionRaw YAML
title: PUA - DefenderCheck Execution
id: f0ca6c24-3225-47d5-b1f5-352bf07ecfa7
status: test
description: Detects the use of DefenderCheck, a tool to evaluate the signatures used in Microsoft Defender. It can be used to figure out the strings / byte chains used in Microsoft Defender to detect a tool and thus used for AV evasion.
references:
- https://github.com/matterpreter/DefenderCheck
author: Florian Roth (Nextron Systems)
date: 2022-08-30
modified: 2023-02-04
tags:
- attack.stealth
- attack.t1027.005
logsource:
category: process_creation
product: windows
detection:
selection:
- Image|endswith: '\DefenderCheck.exe'
- Description: 'DefenderCheck'
condition: selection
falsepositives:
- Unlikely
level: highFalse positives
- Unlikely