Change logs for security intelligence update version 1.449.104.0

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

4/14/2026 2:48:41 PM

Added threat detections

Name	Severity
Adware:Win32/InstallCore!AMTB	high
Phish:HTML/Redirector.PHJ!MTB	severe
Ransom:MSIL/Fantom.MAZ!MTB	severe
Trojan:BAT/Boxter.ABX!MTB	severe
Trojan:BAT/Pantera.RV!MTB	severe
Trojan:BAT/QuasarRat.ATTB!MTB	severe
Trojan:JS/SnakeKeylogger.VUQ!MTB	severe
Trojan:MSIL/DarkTortilla.GGL!MTB	severe
Trojan:MSIL/Marsilia.GPSF!MTB	severe
Trojan:MSIL/PureRat.AL!MTB	severe
Trojan:MSIL/VIPKeylogger.AVTB!MTB	severe
Trojan:MSIL/XWorm.AUTB!MTB	severe
Trojan:PowerShell/Barys.AB!MTB	severe
Trojan:PowerShell/Powdow.SI!ams	severe
Trojan:PowerShell/Powdow.SL!ams	severe
Trojan:Script/SvgStealer.ABL!MTB	severe
Trojan:Script/SvgStealer.ABM!MTB	severe
Trojan:VBS/SLoad.SLAM!MTB	severe
Trojan:Win32/GuLoader.RES!MTB	severe
Trojan:Win32/Mikey.ABVT!MTB	severe
Trojan:Win32/Neoreblamy.NVK!MTB	severe
TrojanDropper:HTML/Obfuse.PE!MTB	severe
TrojanDropper:Win64/Lazy.AHA!MTB	severe

Updated threat detections

Name	Severity
Adware:Win32/Tnega	high
Backdoor:Linux/Gafgyt!rfn	severe
Backdoor:MSIL/XWormRAT!rfn	severe
Backdoor:Win32/Berbew.AA!MTB	severe
Backdoor:Win32/Zegost!rfn	severe
BrowserModifier:Win32/Shafmia	high
HackTool:BAT/AutoKMS!AMTB	high
HackTool:MacOS/Multiverze!rfn	high
HackTool:Python/Impacket!MSR	high
HackTool:Win32/BrowserPassview!rfn	high
HackTool:Win32/crack	high
HackTool:Win32/Crack!AMTB	high
HackTool:Win32/Crack!MTB	high
HackTool:Win32/Mailpassview!rfn	high
HackTool:Win32/RemoteAdmin!MTB	high
HackTool:Win32/RemoteAdmin!rfn	high
Misleading:Win32/Lodi!AMTB	high
Misleading:Win32/Malgent!AMTB	high
Program:Linux/Multiverze!rfn	high
PWS:Win32/Fareit!rfn	severe
Ransom:BAT/DisableDefender.A!dha	severe
Ransom:Win32/Avaddon!rfn	severe
Ransom:Win32/Cobra	severe
Ransom:Win32/Inc!rfn	severe
Ransom:Win32/LockBit!MTB	severe
Ransom:Win64/HiveCrypt!rfn	severe
Ransom:Win64/LockBit!rfn	severe
Trojan:AndroidOS/AVerseFalc!rfn	severe
Trojan:AndroidOS/Multiverze!rfn	severe
Trojan:AndroidOS/SAgnt!MSR	severe
Trojan:BAT/LNK_DarkGate!rfn	severe
Trojan:BAT/Obfuse!MTB	severe
Trojan:BAT/Qakbot!rfn	severe
Trojan:HTML/ScrInject.PLJLH!MTB	severe
Trojan:HTML/ScrInject.SMW!MTB	severe
Trojan:JS/Obfuse!MSR	severe
Trojan:JS/Obfuse.PAP!MTB	severe
Trojan:JS/Obfuse.PAQ!MTB	severe
Trojan:JS/Obfuse.PAR!MTB	severe
Trojan:JS/Redirector.AVSB!MTB	severe
Trojan:JS/RemcosRAT.SI!MTB	severe
Trojan:Linux/Multiverze!rfn	severe
Trojan:MSIL/DarkTortilla!MTB	severe
Trojan:MSIL/Jalapeno.KMD!MTB	severe
Trojan:MSIL/Zusy.SXC!MTB	severe
Trojan:PDF/Phish	severe
Trojan:PDF/Phish!atmn	severe
Trojan:PDF/Phish!rfn	severe
Trojan:PowerShell/Boxter!AMTB	severe
Trojan:PowerShell/Habe.A	severe
Trojan:PowerShell/Malgent!MSR	severe
Trojan:PowerShell/sLoad.F!lnk	severe
Trojan:Script/Malgent!MSR	severe
Trojan:Script/Multiverze!rfn	severe
Trojan:VBS/Qakbot!rfn	severe
Trojan:Win32/Acll!rfn	severe
Trojan:Win32/Alevaul!rfn	severe
Trojan:Win32/Casdet!rfn	severe
Trojan:Win32/Cerber!rfn	severe
Trojan:Win32/Egairtigado!rfn	severe
Trojan:Win32/Eqtonex!rfn	severe
Trojan:Win32/Etset!rfn	severe
Trojan:Win32/Fauppod!rfn	severe
Trojan:Win32/HijackLoader!MTB	severe
Trojan:Win32/Kepavll!rfn	severe
Trojan:Win32/Leonem!rfn	severe
Trojan:Win32/LummaStealer	severe
Trojan:Win32/Malgent	severe
Trojan:Win32/Malgent!MSR	severe
Trojan:Win32/MereTam!rfn	severe
Trojan:Win32/NitrogenLdr!rfn	severe
Trojan:Win32/OffLoader!MTB	severe
Trojan:Win32/Pomal!rfn	severe
Trojan:Win32/Primarypass!rfn	severe
Trojan:Win32/Qakbot!rfn	severe
Trojan:Win32/Qwexlafiba!rfn	severe
Trojan:Win32/Ravartar!rfn	severe
Trojan:Win32/Redline!MTB	severe
Trojan:Win32/Seheq!rfn	severe
Trojan:Win32/Sehyioa.A!cl	severe
Trojan:Win32/Suschil!rfn	severe
Trojan:Win32/ValleyRAT!rfn	severe
Trojan:Win32/Vindor!rfn	severe
Trojan:Win32/Vindor.AHB!MTB	severe
Trojan:Win32/WinLNK.SI!MTB	severe
Trojan:Win32/WinLnk.SL!MTB	severe
Trojan:Win32/Znyonm!rfn	severe
Trojan:Win64/Aotera.RVD!MTB	severe
Trojan:Win64/Boldbadger!rfn	severe
Trojan:Win64/Bruterat!rfn	severe
Trojan:Win64/BumbleBee.K!AMTB	severe
Trojan:Win64/CoinMiner!rfn	severe
Trojan:Win64/CryptInject!rfn	severe
Trojan:Win64/DllHijack!rfn	severe
Trojan:Win64/Latrodectus!rfn	severe
Trojan:Win64/Malgent!MSR	severe
Trojan:Win64/Marte!MTB	severe
Trojan:Win64/Oyster!rfn	severe
Trojan:Win64/Oysterloader!rfn	severe
Trojan:Win64/ShellcodeRunner!rfn	severe
Trojan:Win64/Tedy!MTB	severe
Trojan:Win64/Tedy!rfn	severe
TrojanDownloader:BAT/Phish!rfn	severe
TrojanDownloader:JS/Qakbot!rfn	severe
TrojanDownloader:Linux/SAgnt!MSR	severe
TrojanDownloader:O97M/Emotet!rfn	severe
TrojanDownloader:Win32/Andromeda.SIBB!MTB	severe
TrojanDownloader:Win32/Rugmi!AMTB	severe
VirTool:MSIL/SharpHound!rfn	severe
VirTool:Win32/Lazagne.A!MTB	severe
VirTool:WinNT/Rootkitdrv!rfn	severe
VulnerableDriver:Win64/TrueSight	severe