Change logs for security intelligence update version 1.441.767.0

This page lists newly added and updated threat detections included in security intelligence updates for Microsoft Defender Antivirus and other Microsoft antimalware. If you don’t find the latest security intelligence update version in the selector below, please refresh this page or let us know us know through the feedback smiley.

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Security intelligence update version

Released on

12/6/2025 1:36:34 PM

Added threat detections

Name	Severity
Trojan:JS/Redirector.AUMB!MTB	severe

Updated threat detections

Name	Severity
Backdoor:Linux/Mirai!MTB	severe
Backdoor:MSIL/RevengeRat!rfn	severe
Backdoor:Win64/Supper!rfn	severe
Backdoor:Win64/Vankul!rfn	severe
DoS:Win32/FoxBlade!rfn	severe
HackTool:Linux/PthToolkitGen.ZZ	high
HackTool:Python/Impacket!MSR	high
HackTool:Python/Pypykatz.SA	high
HackTool:Win32/GameHack!MSR	high
HackTool:Win32/Patcher	high
PWS:Win32/Fareit!rfn	severe
Ransom:Win32/BlackCat!rfn	severe
Ransom:Win32/Conti!rfn	severe
Ransom:Win32/ContiCrypt!rfn	severe
Ransom:Win32/Filecoder!rfn	severe
Trojan:AndroidOS/AVerseFalc!rfn	severe
Trojan:BAT/Starter.G!lnk	severe
Trojan:HTML/Qakbot!rfn	severe
Trojan:HTML/SpamLeonem!rfn	severe
Trojan:JS/FSAutcik	severe
Trojan:JS/GuLoader.P!MTB	severe
Trojan:JS/NetLoader.SB!MTB	severe
Trojan:JS/Obfuse!rfn	severe
Trojan:JS/Ursnif!rfn	severe
Trojan:Linux/Multiverze!rfn	severe
Trojan:MSIL/Polazert!rfn	severe
Trojan:O97M/DDownloader!rfn	severe
Trojan:PowerShell/Malgent!MSR	severe
Trojan:PowerShell/Powersploit.T	severe
Trojan:Script/Malgent!MSR	severe
Trojan:VBS/Emotet!rfn	severe
Trojan:VBS/Malgent!MSR	severe
Trojan:VBS/Qakbot!rfn	severe
Trojan:Win32/Agent!MSR	severe
Trojan:Win32/Alevaul!rfn	severe
Trojan:Win32/BlackCat!rfn	severe
Trojan:Win32/Bluteal!rfn	severe
Trojan:Win32/CerberCrypt!rfn	severe
Trojan:Win32/Egairtigado!rfn	severe
Trojan:Win32/Etset!rfn	severe
Trojan:Win32/Fauppod!rfn	severe
Trojan:Win32/FileCoder!rfn	severe
Trojan:Win32/Kepavll!rfn	severe
Trojan:Win32/Keydoor!MSR	severe
Trojan:Win32/Leonem!rfn	severe
Trojan:Win32/LummaStealer	severe
Trojan:Win32/Madokwa!rfn	severe
Trojan:Win32/Malgent	severe
Trojan:Win32/Malgent!MSR	severe
Trojan:Win32/Malgent!MTB	severe
Trojan:Win32/MereTam!rfn	severe
Trojan:Win32/NjRat.NEAA!MTB	severe
Trojan:Win32/Penguish!rfn	severe
Trojan:Win32/PhishLeonem!rfn	severe
Trojan:Win32/Pomal!rfn	severe
Trojan:Win32/Pterodo!rfn	severe
Trojan:Win32/Rhadamanthys.SA	severe
Trojan:Win32/SalatStealer.NRR!MTB	severe
Trojan:Win32/Seheq!rfn	severe
Trojan:Win32/Suschil!rfn	severe
Trojan:Win32/Tiggre!rfn	severe
Trojan:Win32/Vankul!rfn	severe
Trojan:Win32/Vindor!rfn	severe
Trojan:Win32/Yomal!rfn	severe
Trojan:Win32/Zenpack!rfn	severe
Trojan:Win32/Zloader!rfn	severe
Trojan:Win32/Znyonm!rfn	severe
Trojan:Win64/BazaarLoader!rfn	severe
Trojan:Win64/BruteRatel!rfn	severe
Trojan:Win64/Cobaltstrike!rfn	severe
Trojan:Win64/Emotet!rfn	severe
Trojan:Win64/Farfli.AHC!MTB	severe
Trojan:Win64/FSAutcik	severe
Trojan:Win64/Mikey!MTB	severe
Trojan:Win64/OyesterLoader!rfn	severe
Trojan:Win64/RaStealer!rfn	severe
Trojan:Win64/Rozena.LM!MTB	severe
Trojan:Win64/Tedy!MTB	severe
Trojan:Win64/Turla!rfn	severe
Trojan:Win64/Zusy.ZAZ!MTB	severe
TrojanDownloader:BAT/QakBotLoader!rfn	severe
TrojanDownloader:JS/Qakbot!rfn	severe
TrojanDownloader:O97M/EnCDoc	severe