Change logs for security intelligence update version 1.449.452.0

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

5/5/2026 12:28:16 AM

Added threat detections

Name	Severity
Phish:HTML/Redirector.PHM!MTB	severe
Ransom:Win64/Exitium.A	severe
Ransom:Win64/Interlock.D	severe
Trojan:HTML/Beluga.SN!MTB	severe
Trojan:HTML/Beluga.SND!MTB	severe
Trojan:HTML/BitCoinMiner.SN!MTB	severe
Trojan:JS/JSCeal	severe
Trojan:JS/Redirector.BHK!MSR	severe
Trojan:JS/Redirector.DXL!MTB	severe
Trojan:MacOS/AmosStealer.DA!MTB	severe
Trojan:MSIL/ClipBanker.KGB!MTB	severe
Trojan:MSIL/Zilla.TNP!MTB	severe
Trojan:PDF/Phish.KP!MSR	severe
Trojan:PowerShell/Boxter.HJE!MTB	severe
Trojan:Python/DiscordStealer.SLAN!MTB	severe
Trojan:Script/SvgStealer.MGG!MTB	severe
Trojan:VBS/Downloader.BHK!MSR	severe
Trojan:VBS/Runner.TMC!MTB	severe
Trojan:Win32/Amatera.FX!MTB	severe
Trojan:Win32/Formbook.MKN!MTB	severe
Trojan:Win32/WinLNK.CLN!MTB	severe
Trojan:Win64/Donut.HL!MTB	severe
Trojan:Win64/Tedy.BAE!MTB	severe
Trojan:Win64/Vidar.HL!MTB	severe

Updated threat detections

Name	Severity
Adware:Win32/Agent	high
Backdoor:MSIL/AsyncRAT!rfn	severe
Backdoor:MSIL/Bladabindi!rfn	severe
Backdoor:MSIL/Quasar!rfn	severe
Backdoor:Win32/Remcos!rfn	severe
Backdoor:Win64/Noiserv!rfn	severe
BrowserModifier:Win32/MediaArena	high
Exploit:Linux/CVE-2021-3490.C!MTB	severe
Exploit:O97M/CVE-2017-11882.NUB!MTB	severe
Exploit:Win32/Tudimons.A!dha	severe
HackTool:PowerShell/DumpDBCreds!rfn	high
HackTool:PowerShell/PowerSploit.F	high
HackTool:Python/Impacket!MSR	high
HackTool:Python/Impacket.AAO	high
HackTool:Python/RemoteShell!MSR	high
HackTool:Win32/AutoKMS!MTB	high
HackTool:Win32/crack	high
HackTool:Win32/Crack!MTB	high
HackTool:Win32/Defendercontrol.A	high
HackTool:Win32/Keygen	high
HackTool:Win32/Keygen!MSR	high
HackTool:Win32/Logoloz!rfn	high
HackTool:Win32/Malgent!MSR	high
HackTool:Win32/Mikatz!dha	high
HackTool:Win32/Mimikatz.AA!MTB	high
HackTool:Win32/Patcher	high
HackTool:Win64/RDPWrap!MTB	high
HackTool:Win64/RemoteAdmin!rfn	high
Misleading:Win32/Lodi!MSR	high
MonitoringTool:Win32/MicTrayDebugger	severe
PWS:Win32/Fareit!rfn	severe
Ransom:Linux/Babuk!rfn	severe
Ransom:MacOS/Kuiper.A!MTB	severe
Ransom:Win32/Basta!rfn	severe
Ransom:Win32/BastaLoader!rfn	severe
Ransom:Win32/Helldown!rfn	severe
Ransom:Win32/Inc!rfn	severe
Ransom:Win32/NoEscape!rfn	severe
Ransom:Win32/PowerRanges.A	severe
Ransom:Win32/QilinCrypt.PA!MTB	severe
Ransom:Win32/Qilinloader!rfn	severe
Ransom:Win64/Akira!rfn	severe
Ransom:Win64/DarkPower!rfn	severe
Ransom:Win64/Exitium.A	severe
Trojan:AndroidOS/AVerseFalc!rfn	severe
Trojan:HTML/FakeCaptcha.P!MTB	severe
Trojan:HTML/Phish!rfn	severe
Trojan:HTML/Phish.HBA!MTB	severe
Trojan:HTML/Phish.MH!MTB	severe
Trojan:HTML/Pterodo!rfn	severe
Trojan:HTML/Qakbot!rfn	severe
Trojan:HTML/Redirector!rfn	severe
Trojan:HTML/Redirector.MSS!MTB	severe
Trojan:HTML/ScrInject.SJKP!MTB	severe
Trojan:HTML/ScrInject.SMW!MTB	severe
Trojan:HTML/ScrInject.SPBD!MTB	severe
Trojan:iPhoneOS/Multiverze!rfn	severe
Trojan:JS/FormBook!MTB	severe
Trojan:JS/Malgent!MSR	severe
Trojan:JS/Obfuse.PAH!MTB	severe
Trojan:JS/Phish!rfn	severe
Trojan:JS/Redirector.DXL!MTB	severe
Trojan:Linux/Multiverze!rfn	severe
Trojan:MacOS/AmosStealer.GAV!MTB	severe
Trojan:MacOS/Multiverze!rfn	severe
Trojan:MSIL/Agent!AMTB	severe
Trojan:MSIL/AgentTesla	severe
Trojan:MSIL/FormBook!rfn	severe
Trojan:MSIL/Injuke!rfn	severe
Trojan:MSIL/MassLogger.ZZE!MTB	severe
Trojan:MSIL/Noon.AMG!MTB	severe
Trojan:MSIL/Noon.ANM!MTB	severe
Trojan:MSIL/Polazert!rfn	severe
Trojan:MSIL/Stealer!MTB	severe
Trojan:MSIL/Tedy!MTB	severe
Trojan:MSIL/XWorm.AHUB!MTB	severe
Trojan:MSIL/XWorm.AXM!MTB	severe
Trojan:MSIL/Zusy!MTB	severe
Trojan:PowerShell/Asyncrat!rfn	severe
Trojan:PowerShell/Boxter.AIUB!MTB	severe
Trojan:PowerShell/Boxter.HJD!MTB	severe
Trojan:PowerShell/CredentialPhisher	severe
Trojan:PowerShell/Malagent!MSR	severe
Trojan:PowerShell/Powersploit.A!MTB	severe
Trojan:PowerShell/QakBot!rfn	severe
Trojan:Python/Bobik.EB!MTB	severe
Trojan:Python/Mythic!rfn	severe
Trojan:Python/Stealer!MTB	severe
Trojan:Script/Multiverze!rfn	severe
Trojan:VBS/Emotet!rfn	severe
Trojan:VBS/NetLoader.SLAQ!MTB	severe
Trojan:VBS/Obfuse!rfn	severe
Trojan:VBS/Pterodo!rfn	severe
Trojan:VBS/Qakbot!rfn	severe
Trojan:Win32/Acll!rfn	severe
Trojan:Win32/Agentz!rfn	severe
Trojan:Win32/Alevaul!MSR	severe
Trojan:Win32/Alevaul!rfn	severe
Trojan:Win32/Bumblebee!rfn	severe
Trojan:Win32/Casdet!rfn	severe
Trojan:Win32/Cerber!rfn	severe
Trojan:Win32/CoinMiner!rfn	severe
Trojan:Win32/Copak.KAV!MTB	severe
Trojan:Win32/Copak.KK!MTB	severe
Trojan:Win32/DSSDetection	severe
Trojan:Win32/Egairtigado!rfn	severe
Trojan:Win32/Etset!rfn	severe
Trojan:Win32/Fanop!rfn	severe
Trojan:Win32/Fareit.PT!MTB	severe
Trojan:Win32/Farfli!rfn	severe
Trojan:Win32/Fauppod!rfn	severe
Trojan:Win32/Flowbel!rfn	severe
Trojan:Win32/Floxif!rfn	severe
Trojan:Win32/Fragtor.AFG!MTB	severe
Trojan:Win32/Glupteba!rfn	severe
Trojan:Win32/Gozi!rfn	severe
Trojan:Win32/Grandoreiro!rfn	severe
Trojan:Win32/GuLoader.RVBG!MTB	severe
Trojan:Win32/IcedIdLNK!rfn	severe
Trojan:Win32/Injector!rfn	severe
Trojan:Win32/InjectorCrypt!rfn	severe
Trojan:Win32/Kepavll!rfn	severe
Trojan:Win32/KillAv!rfn	severe
Trojan:Win32/Kryptik	severe
Trojan:Win32/Leonem!rfn	severe
Trojan:Win32/Malgent	severe
Trojan:Win32/Malgent!AMTB	severe
Trojan:Win32/Malgent!MSR	severe
Trojan:Win32/Malgent!rfn	severe
Trojan:Win32/MereTam!rfn	severe
Trojan:Win32/Nanocore!rfn	severe
Trojan:Win32/Occamy.C14	severe
Trojan:Win32/Occamy.C8B	severe
Trojan:Win32/PhishLeonem!rfn	severe
Trojan:Win32/Pikabot!rfn	severe
Trojan:Win32/Pomal!rfn	severe
Trojan:Win32/Pterodo!rfn	severe
Trojan:Win32/Qbot!rfn	severe
Trojan:Win32/QuasarRat!MTB	severe
Trojan:Win32/Qwexlafiba!rfn	severe
Trojan:Win32/Ravartar!rfn	severe
Trojan:Win32/Salgorea.SLWO!MTB	severe
Trojan:Win32/Seheq!rfn	severe
Trojan:Win32/Sehyioa.A!cl	severe
Trojan:Win32/ShellcodeRunner!MTB	severe
Trojan:Win32/ShortcutFileInZipExec!rfn	severe
Trojan:Win32/ShortSeek!rfn	severe
Trojan:Win32/Stealer.DAC!MTB	severe
Trojan:Win32/Suloc!rfn	severe
Trojan:Win32/Suschil!rfn	severe
Trojan:Win32/Swisyn.ADA!MTB	severe
Trojan:Win32/Tedy!MTB	severe
Trojan:Win32/Tiggre!rfn	severe
Trojan:Win32/Vindor!rfn	severe
Trojan:Win32/WinLNK.HFJ!MTB	severe
Trojan:Win32/Yomal!rfn	severe
Trojan:Win32/Znyonm!rfn	severe
Trojan:Win32/Zusy.BL!MTB	severe
Trojan:Win32/Zusy.KK!MTB	severe
Trojan:Win64/ACRStealer!MTB	severe
Trojan:Win64/ACRStealer.VGA!MTB	severe
Trojan:Win64/AdaptixC2.MX!MTB	severe
Trojan:Win64/AVTamper!rfn	severe
Trojan:Win64/BLackWidow!rfn	severe
Trojan:Win64/BumbleBee!rfn	severe
Trojan:Win64/CobaltStrike!rfn	severe
Trojan:Win64/CoinMiner!rfn	severe
Trojan:Win64/CryptInject!rfn	severe
Trojan:Win64/DLLHijack!MTB	severe
Trojan:Win64/DllInject!rfn	severe
Trojan:Win64/Donut!rfn	severe
Trojan:Win64/Emotetcrypt!rfn	severe
Trojan:Win64/Maloder!rfn	severe
Trojan:Win64/Midie!MTB	severe
Trojan:Win64/Midie!rfn	severe
Trojan:Win64/Mikey!MTB	severe
Trojan:Win64/Mikey.AMI!MTB	severe
Trojan:Win64/OyesterLoader!rfn	severe
Trojan:Win64/Oyster!rfn	severe
Trojan:Win64/OysterLoader!rfn	severe
Trojan:Win64/PortStarter!rfn	severe
Trojan:Win64/RootkitDrv!MSR	severe
Trojan:Win64/RustyStealer.CP!MTB	severe
Trojan:Win64/ShellcodeRunner!rfn	severe
Trojan:Win64/TangoStealer!MTB	severe
Trojan:Win64/Tedy!MTB	severe
Trojan:Win64/Tedy!rfn	severe
Trojan:Win64/Vidar.ARA!MTB	severe
Trojan:Win64/VMProtect!MTB	severe
Trojan:Win64/ZLoaderE!rfn	severe
Trojan:Win64/Zusy!MTB	severe
Trojan:Win64/Zusy!rfn	severe
Trojan:Win64/Zusy.PGZI!MTB	severe
TrojanClicker:Win32/Doplik.R	severe
TrojanDownloader:BAT/QakBotLoader!rfn	severe
TrojanDownloader:JS/Qakbot!rfn	severe
TrojanDownloader:MSIL/AgentTesla!rfn	severe
TrojanDownloader:O97M/Emotet!rfn	severe
TrojanDownloader:SWF/Esaprof!rfn	severe
TrojanDownloader:VBS/CoinMiner	severe
TrojanDownloader:Win32/Esaprof!rfn	severe
TrojanDownloader:Win32/ShortSeek!rfn	severe
TrojanDropper:Win32/Malgent!MSR	severe
VirTool:Win32/AmsiTamper	severe
VirTool:Win32/Sliver!rfn	severe
VirTool:Win64/CobaltStrike!rfn	severe
VirTool:WinNT/Rootkitdrv!rfn	severe
Worm:Win32/Brontok!rfn	severe