Phoenix Studio
Convert indexed Sigma rules into analyst-ready detections.
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Indexed Rules
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CLI Versions
10
Newest: 2.0.2
Translation Workspace
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Active Rule
Suspicious Windows Defender Registry Key Tampering Via Reg.EXE
Target Profile
Splunk
Splunk SPL & tstats data model queries
Format Mode
Default
Plain SPL queries
Conversion Output
Suspicious Windows Defender Registry Key Tampering Via Reg.EXE
Using Splunk · Default · sigma-cli 2.0.2
Translation controls
Adjust the rule on the left, then regenerate when you want a fresh backend-native query.
BackendSplunkFormatDefaultVersion2.0.2
title: Suspicious Windows Defender Registry Key Tampering Via Reg.EXE
id: 452bce90-6fb0-43cc-97a5-affc283139b3
status: test
description: |
Detects the usage of "reg.exe" to tamper with different Windows Defender registry keys in order to disable some important features related to protection and detection
references:
- https://thedfirreport.com/2022/03/21/apt35-automates-initial-access-using-proxyshell/
- https://github.com/swagkarna/Defeat-Defender-V1.2.0/tree/ae4059c4276da6f6303b8f53cdff085ecae88a91
- https://www.elevenforum.com/t/video-guide-how-to-completely-disable-microsoft-defender-antivirus.14608/page-2
- https://tria.ge/241231-j9yatstqbm/behavioral1
author: Florian Roth (Nextron Systems), Swachchhanda Shrawan Poudel, Nasreddine Bencherchali (Nextron Systems)
date: 2022-03-22
modified: 2025-06-04
tags:
- attack.defense-evasion
- attack.t1562.001
logsource:
category: process_creation
product: windows
detection:
selection_root_img:
- Image|endswith: '\reg.exe'
- OriginalFileName: 'reg.exe'
selection_root_path:
CommandLine|contains:
- 'SOFTWARE\Microsoft\Windows Defender\'
- 'SOFTWARE\Policies\Microsoft\Windows Defender Security Center'
- 'SOFTWARE\Policies\Microsoft\Windows Defender\'
selection_dword_0:
CommandLine|contains|all:
- ' add '
- 'd 0'
CommandLine|contains:
- 'DisallowExploitProtectionOverride'
- 'EnableControlledFolderAccess'
- 'MpEnablePus'
- 'PUAProtection'
- 'SpynetReporting'
- 'SubmitSamplesConsent'
- 'TamperProtection'
selection_dword_1:
CommandLine|contains|all:
- ' add '
- 'd 1'
CommandLine|contains:
- 'DisableAccess'
- 'DisableAntiSpyware'
- 'DisableAntiSpywareRealtimeProtection'
- 'DisableAntiVirus'
- 'DisableAntiVirusSignatures'
- 'DisableArchiveScanning'
- 'DisableBehaviorMonitoring'
- 'DisableBlockAtFirstSeen'
- 'DisableCloudProtection'
- 'DisableConfig'
- 'DisableEnhancedNotifications'
- 'DisableIntrusionPreventionSystem'
- 'DisableIOAVProtection'
- 'DisableNetworkProtection'
- 'DisableOnAccessProtection'
- 'DisablePrivacyMode'
- 'DisableRealtimeMonitoring'
- 'DisableRoutinelyTakingAction'
- 'DisableScanOnRealtimeEnable'
- 'DisableScriptScanning'
- 'DisableSecurityCenter'
- 'Notification_Suppress'
- 'SignatureDisableUpdateOnStartupWithoutEngine'
condition: all of selection_root_* and 1 of selection_dword_*
falsepositives:
- Rare legitimate use by administrators to test software (should always be investigated)
level: high
CLI command
Copy the exact command to reproduce this translation locally.
sigma convert --without-pipeline -t splunk -f default rules/windows/process_creation/proc_creation_win_reg_windows_defender_tamper.yml