Change logs for security intelligence update version 1.441.770.0

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 4:14:45 PM

Added threat detections

Name	Severity
Trojan:Win32/Fiestaek!rfn	severe
Virus:Win32/Neshta!rfn	severe

Updated threat detections

Name	Severity
Backdoor:PHP/Remoteshell.F	severe
HackTool:BAT/AutoKMS!AMTB	high
HackTool:PowerShell/PowerView.A	high
HackTool:Python/Impacket!MSR	high
HackTool:Python/Impacket!MTB	high
HackTool:Win32/Activator	high
HackTool:Win32/Activator!AMTB	high
HackTool:Win32/AutoKMS	high
HackTool:Win32/crack	high
HackTool:Win32/Crack!MTB	high
HackTool:Win32/ExtremeInjector	high
HackTool:Win32/Keygen	high
HackTool:Win32/Malgent!MSR	high
HackTool:Win32/WNetWatcher!MTB	high
Ransom:Win32/Qilin!rfn	severe
Ransom:Win64/Ransomhub!rfn	severe
Trojan:AndroidOS/AVerseFalc!rfn	severe
Trojan:HTML/Phish!MSR	severe
Trojan:HTML/Qakbot!rfn	severe
Trojan:HTML/SpamLeonem!rfn	severe
Trojan:Linux/CoinMiner.N!MTB	severe
Trojan:Linux/Multiverze	severe
Trojan:PowerShell/QakBot!rfn	severe
Trojan:Python/Malgent!MSR	severe
Trojan:Script/Metasploit!MSR	severe
Trojan:Win32/Alevaul!rfn	severe
Trojan:Win32/Ceevee	severe
Trojan:Win32/Egairtigado!rfn	severe
Trojan:Win32/Etset!rfn	severe
Trojan:Win32/Kepavll!rfn	severe
Trojan:Win32/Leonem!rfn	severe
Trojan:Win32/Malgent	severe
Trojan:Win32/Malgent!MTB	severe
Trojan:Win32/MereTam!rfn	severe
Trojan:Win32/PhishLeonem!rfn	severe
Trojan:Win32/Pomal!rfn	severe
Trojan:Win32/Seheq!rfn	severe
Trojan:Win32/Suschil!rfn	severe
Trojan:Win32/VMProtect	severe
Trojan:Win32/Yomal!rfn	severe
Trojan:Win64/Injector	severe
Trojan:Win64/Injector.EO	severe
Trojan:Win64/Malgent!MSR	severe
Trojan:Win64/SpyLoader!rfn	severe
Trojan:Win64/Tedy!MTB	severe
Trojan:Win64/Turla!rfn	severe
Trojan:Win64/XLoader!MTB	severe
Trojan:Win64/XLoader.NQB!MTB	severe
TrojanDownloader:BAT/QakBotLoader!rfn	severe
TrojanDownloader:JS/Qakbot!rfn	severe
TrojanSpy:AndroidOS/Asacub.B!dha	severe
VirTool:MSIL/Masky	severe