Change logs for security intelligence update version 1.445.15.0

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

2/12/2026 4:20:29 PM

Added threat detections

Name	Severity
Backdoor:Win64/Convagent!MTB	severe
Backdoor:Win64/XWorm!MTB	severe
Behavior:Win32/MpTamperExclSelfProtect.A	severe
Behavior:Win32/MpTamperExclSelfProtect.B	severe
Behavior:Win32/PrintNotifySvcDllHijack.A	severe
Behavior:Win32/PrintNotifySvcDllHijack.B	severe
Behavior:Win32/PrintNotifySvcDllHijack.C	severe
HackTool:MSIL/Spoofer!AMTB	high
SupportScam:Win32/Screwon.PRP!MTB	severe
Trojan:HTML/Redirector.PAJK!MTB	severe
Trojan:MSIL/AsyncRat.AOQB!MTB	severe
Trojan:MSIL/Purelogs.PGPL!MTB	severe
Trojan:MSIL/Zilla.AC!MTB	severe
Trojan:Python/BYOB.CT!MTB	severe
Trojan:Python/BYOBKey.CT!MTB	severe
Trojan:Win64/Bypass!MTB	severe
Trojan:Win64/FakeRun!MTB	severe
Trojan:Win64/Vidar.GHM!MTB	severe

Updated threat detections

Name	Severity
Backdoor:Java/WebShell.D!dha	severe
Backdoor:MSIL/XWormRAT!rfn	severe
DDoS:Win32/Nitol!rfn	severe
DoS:Win32/WprLandblan!rfn	severe
HackTool:Win32/AutoKMS!AMTB	high
Phish:HTML/FakeLogin!AMTB	severe
Ransom:Win32/Filecoder!rfn	severe
Ransom:Win64/LockBit!rfn	severe
Spyware:AndroidOS/Multiverze!rfn	high
Trojan:AndroidOS/AVerseFalc!rfn	severe
Trojan:JS/QakbotLNK!rfn	severe
Trojan:JS/Redirector!AMTB	severe
Trojan:MSIL/AgentTesla.NCV!MTB	severe
Trojan:PDF/Phish.BD!MTB	severe
Trojan:PowerShell/CredentialPhisher	severe
Trojan:PowerShell/Nemucod!rfn	severe
Trojan:PowerShell/Pklotide.A	severe
Trojan:PowerShell/Powersploit.T	severe
Trojan:VBS/Emotet!rfn	severe
Trojan:Win32/Acll!rfn	severe
Trojan:Win32/Alevaul!rfn	severe
Trojan:Win32/Casdet!rfn	severe
Trojan:Win32/CryptInject!rfn	severe
Trojan:Win32/Egairtigado!rfn	severe
Trojan:Win32/Etset!rfn	severe
Trojan:Win32/Kepavll!rfn	severe
Trojan:Win32/Leonem!rfn	severe
Trojan:Win32/Malgent!MTB	severe
Trojan:Win32/Malgent!rfn	severe
Trojan:Win32/MereTam!rfn	severe
Trojan:Win32/Neoreblamy!MTB	severe
Trojan:Win32/Neoreblamy.NJU!MTB	severe
Trojan:Win32/NjRat.NEAA!MTB	severe
Trojan:Win32/Seheq!rfn	severe
Trojan:Win32/StealC!rfn	severe
Trojan:Win32/Suschil!rfn	severe
Trojan:Win32/Yomal!rfn	severe
Trojan:Win32/Znyonm!rfn	severe
Trojan:Win32/Zusy!MTB	severe
Trojan:Win32/Zusy.AZU!MTB	severe
Trojan:Win64/BlackWidow!rfn	severe
Trojan:Win64/CoinMiner!rfn	severe
Trojan:Win64/CryptInject!rfn	severe
Trojan:Win64/Dacic.AH!MTB	severe
Trojan:Win64/DllInject!MTB	severe
Trojan:Win64/DriverLoader!rfn	severe
Trojan:Win64/Emotetcrypt!rfn	severe
Trojan:Win64/EmotetPacker!rfn	severe
Trojan:Win64/Latrodectus!rfn	severe
Trojan:Win64/Midie!MTB	severe
Trojan:Win64/Rhadamanthys.NTM!MTB	severe
Trojan:Win64/Rozena!MTB	severe
Trojan:Win64/Tedy.AH!MTB	severe
Trojan:Win64/Zusy!MTB	severe
Trojan:Win64/Zusy.KK!MTB	severe
TrojanDownloader:BAT/QakBotLoader!rfn	severe
TrojanDownloader:MSIL/Tnega	severe
TrojanDownloader:O97M/Donoff	severe
TrojanDownloader:VBS/Boxter!AMTB	severe
Worm:Win32/Macoute!rfn	severe