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Change logs for security intelligence update version 1.447.137.0

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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Released on

4/2/2026 6:55:29 PM

Added threat detections

Name Severity
HackTool:Win64/RemoteAdmin!rfn high
Ransom:Win64/LockFile.NVA!MTB severe
Trojan:BAT/DisableDefender.P!MTB severe
Trojan:HTML/Redirector.DCL!MTB severe
Trojan:JS/AxioRAT.HAB!MTB severe
Trojan:JS/Obfuse.HAH!MTB severe
Trojan:MSIL/PhantomStealer.ABX!MTB severe
Trojan:MSIL/Quasar.ZDF!MTB severe
Trojan:PowerShell/Boxter.SLQX!MTB severe
Trojan:Script/SvgStealer.ABH!MTB severe
Trojan:Win32/GuLoader.REQ!MTB severe
Trojan:Win32/LummaStealer.DKC!MTB severe
Trojan:Win32/Neoreblamy.NVA!MTB severe
Trojan:Win64/Mikey.MKE!MTB severe

Updated threat detections

Name Severity
Adware:Win32/Neoreklami high
Adware:Win32/Tnega high
Backdoor:PHP/Webshell.AR severe
Backdoor:Win32/Fynloski!rfn severe
Behavior:MacOS/NPMPackageJsonReplace.A severe
HackTool:BAT/Dotaperture.C high
HackTool:Python/Impacket high
HackTool:Python/Impacket.AAO high
HackTool:Python/Impacket.AZ high
HackTool:Win32/AutoKMS high
HackTool:Win32/BrowserPassview!rfn high
HackTool:Win32/crack high
HackTool:Win32/Crack!MTB high
HackTool:Win32/Mailpassview!rfn high
HackTool:Win32/Mikatz!dha high
HackTool:Win32/Patcher!MTB high
HackTool:Win64/DCSyncer!rfn high
HackTool:Win64/Injector!MTB high
HackTool:Win64/Malgent!MSR high
Misleading:Win32/Lodi high
Misleading:Win32/Malgent high
Phish:PDF/FakeRobot.RV!MTB severe
Program:Linux/Multiverze!rfn high
SupportScam:Win32/Screwon!AMTB severe
Trojan:AndroidOS/AVerseFalc!rfn severe
Trojan:AndroidOS/Multiverze!rfn severe
Trojan:BAT/DisableDefender.P!MTB severe
Trojan:BAT/Qakbot!rfn severe
Trojan:HTML/Phish.SXK!MTB severe
Trojan:HTML/Redirector.BAJ!MTB severe
Trojan:HTML/ScrInject.SMW!MTB severe
Trojan:JS/Guloader!MTB severe
Trojan:JS/NetLoader.RR!MTB severe
Trojan:JS/Obfuse.PAK!MTB severe
Trojan:JS/Obfuse.RR!MTB severe
Trojan:JS/QakbotLNK!rfn severe
Trojan:JS/Redirector.AVSB!MTB severe
Trojan:Linux/Multiverze!rfn severe
Trojan:MacOS/Multiverze!rfn severe
Trojan:MSIL/FormBook!rfn severe
Trojan:MSIL/Gentromal.A severe
Trojan:MSIL/Injector.SXA!MTB severe
Trojan:MSIL/Keylogger.SX!MTB severe
Trojan:MSIL/Polazert!rfn severe
Trojan:MSIL/Zusy.SXC!MTB severe
Trojan:O97M/DDownloader!rfn severe
Trojan:Python/Bobik.EB!MTB severe
Trojan:Python/MuddyWater.DB!MTB severe
Trojan:Python/Tnega!MSR severe
Trojan:Script/Multiverze!rfn severe
Trojan:Script/Wacatac severe
Trojan:SH/SAgnt!MSR severe
Trojan:VBS/Pterodo!rfn severe
Trojan:Win32/Acll!rfn severe
Trojan:Win32/Alevaul!rfn severe
Trojan:Win32/Carbanak!rfn severe
Trojan:Win32/Casdet!rfn severe
Trojan:Win32/Cerber!rfn severe
Trojan:Win32/CobaltStrike!rfn severe
Trojan:Win32/CoreWarrior.DA!MTB severe
Trojan:Win32/DllInject!rfn severe
Trojan:Win32/Egairtigado!rfn severe
Trojan:Win32/Etset!rfn severe
Trojan:Win32/Flystudio severe
Trojan:Win32/GuLoader.RVBG!MTB severe
Trojan:Win32/Kepavll!rfn severe
Trojan:Win32/Keydoor!MSR severe
Trojan:Win32/Kovter!rfn severe
Trojan:Win32/Leonem!rfn severe
Trojan:Win32/Malex!rfn severe
Trojan:Win32/Malgent severe
Trojan:Win32/Malgent!MSR severe
Trojan:Win32/MalLoader!rfn severe
Trojan:Win32/MereTam!rfn severe
Trojan:Win32/Meterpreter!rfn severe
Trojan:Win32/njRAT!rfn severe
Trojan:Win32/OffLoader!MTB severe
Trojan:Win32/PhishLeonem!rfn severe
Trojan:Win32/Qakbot!rfn severe
Trojan:Win32/QQPass.G!MTB severe
Trojan:Win32/Qwexlafiba!rfn severe
Trojan:Win32/Ravartar!rfn severe
Trojan:Win32/Rctopus severe
Trojan:Win32/Redcap!rfn severe
Trojan:Win32/Remcos!rfn severe
Trojan:Win32/Salgorea.C!MTB severe
Trojan:Win32/Salgorea.SLWO!MTB severe
Trojan:Win32/Seheq!rfn severe
Trojan:Win32/ShortSeek!rfn severe
Trojan:Win32/Skeeyah.A!MTB severe
Trojan:Win32/SpyNoon.STEM!MTB severe
Trojan:Win32/StealC!rfn severe
Trojan:Win32/Suschil!rfn severe
Trojan:Win32/Vindor!rfn severe
Trojan:Win32/Znyonm!rfn severe
Trojan:Win32/Zusy.KK!MTB severe
Trojan:Win64/AsyncRat!rfn severe
Trojan:Win64/CobaltStrike!rfn severe
Trojan:Win64/CoinMiner!rfn severe
Trojan:Win64/Emotet!rfn severe
Trojan:Win64/IcedID!rfn severe
Trojan:Win64/Lazy.MKC!MTB severe
Trojan:Win64/Lazy.MKK!MTB severe
Trojan:Win64/Malgent!MSR severe
Trojan:Win64/NightHawk!rfn severe
Trojan:Win64/Oyster!rfn severe
Trojan:Win64/Tedy!MTB severe
Trojan:Win64/Tedy.CQ!MTB severe
Trojan:Win64/Vidar!MTB severe
Trojan:Win64/Vidar.KG!MTB severe
Trojan:Win64/VMProtect!MTB severe
Trojan:Win64/Zusy!MTB severe
TrojanDownloader:JS/Qakbot!rfn severe
TrojanDownloader:O97M/Emotet!rfn severe
TrojanDownloader:VBS/TalonStrike.E!dha severe
TrojanDownloader:Win32/ShortSeek!rfn severe
VirTool:WinNT/Citeary!rfn severe
VirTool:WinNT/Rootkitdrv!rfn severe
Worm:Win32/Mofksys!rfn severe