Change logs for security intelligence update version 1.447.139.0

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

4/2/2026 9:35:55 PM

Added threat detections

Name	Severity
Trojan:AndroidOS/LuckyPatcher!AMTB	severe
Trojan:HTML/Redirector.PGRR!MTB	severe
Trojan:Linux/CredentialStealer.TV7	severe
Trojan:Linux/DataExfil.TV8	severe
Trojan:Linux/DataExfil.TV9	severe
Trojan:Linux/SuspMasquerade.TV5	severe
Trojan:MSIL/Injuke.RS!MTB	severe
Trojan:MSIL/Patcher.GPKG!MTB	severe
Trojan:Win32/AntiAV.GPAK!MTB	severe
Trojan:Win32/Lazy.K!AMTB	severe
Trojan:Win32/WinLNK.AR!AMTB	severe
Trojan:Win64/Loader.PA!MTB	severe

Updated threat detections

Name	Severity
Adware:Win32/Agent	high
Backdoor:Linux/Mirai!rfn	severe
Backdoor:MSIL/XWormRAT!rfn	severe
Backdoor:PHP/Perhetshell.B!dha	severe
Backdoor:Win64/BruteRatel!rfn	severe
Behavior:Linux/Exfiltration.TV2	severe
Behavior:Win32/Mamadut.CH	severe
Behavior:Win32/SuspNodeJSExecInSpecificFolder.A	severe
Behavior:Win32/SuspNodeJSExecInSpecificFolder.B	severe
Behavior:Win32/SuspNodeJSExecInSpecificFolder.C	severe
BrowserModifier:Win32/MediaArena	high
Exploit:HTML/IframeRef!rfn	severe
Exploit:JS/CVE-2010-0806.gen!A	severe
Exploit:O97M/CVE-2017-0199.RDH!MTB	severe
HackTool:PowerShell/PowerView!pz	high
HackTool:Python/Impacket!MSR	high
HackTool:Win32/BulletsPassView	high
HackTool:Win32/Chisel.A	high
HackTool:Win32/RemoteAdmin	high
HackTool:Win64/BulletsPassView	high
PWS:Win32/Fareit!rfn	severe
Ransom:Win32/BlackCat!rfn	severe
Trojan:AndroidOS/AVerseFalc!rfn	severe
Trojan:BAT/LNK_DarkGate!rfn	severe
Trojan:BAT/Qakbot!rfn	severe
Trojan:HTML/Phish.PGPH!MTB	severe
Trojan:HTML/SpamLeonem!rfn	severe
Trojan:JS/Malgent!MSR	severe
Trojan:JS/Obfuse.DA!MTB	severe
Trojan:JS/ObfuseLNK.ALY!MTB	severe
Trojan:JS/QakbotLNK!rfn	severe
Trojan:JS/Tnega.AL!MTB	severe
Trojan:Linux/Multiverze!rfn	severe
Trojan:MSIL/Jalapeno!MTB	severe
Trojan:MSIL/Zusy.SXC!MTB	severe
Trojan:Script/Multiverze!rfn	severe
Trojan:SH/SAgnt!MSR	severe
Trojan:VBS/Emotet!rfn	severe
Trojan:VBS/FormBook.AS!AMTB	severe
Trojan:Win32/Acll!rfn	severe
Trojan:Win32/Alevaul!rfn	severe
Trojan:Win32/Bluteal!rfn	severe
Trojan:Win32/Casdet!rfn	severe
Trojan:Win32/CoreWarrior.DA!MTB	severe
Trojan:Win32/CryptInject!rfn	severe
Trojan:Win32/Cryware!rfn	severe
Trojan:Win32/DllInject	severe
Trojan:Win32/DllInject!rfn	severe
Trojan:Win32/Egairtigado!rfn	severe
Trojan:Win32/Fauppod!rfn	severe
Trojan:Win32/Guloader.K!MTB	severe
Trojan:Win32/GuLoader.PSL!MTB	severe
Trojan:Win32/GuLoader.REQ!MTB	severe
Trojan:Win32/Kepavll!rfn	severe
Trojan:Win32/Lazy!rfn	severe
Trojan:Win32/Leonem!rfn	severe
Trojan:Win32/LummaStealer!MTB	severe
Trojan:Win32/Malgent!MSR	severe
Trojan:Win32/MereTam!rfn	severe
Trojan:Win32/Pomal!rfn	severe
Trojan:Win32/Qwexlafiba!rfn	severe
Trojan:Win32/Ravartar!rfn	severe
Trojan:Win32/Seheq!rfn	severe
Trojan:Win32/ShortSeek!rfn	severe
Trojan:Win32/Skeeyah.A!MTB	severe
Trojan:Win32/Suschil!rfn	severe
Trojan:Win32/Tedy!MTB	severe
Trojan:Win32/Valleyrat!AMTB	severe
Trojan:Win32/Vindor.AHB!MTB	severe
Trojan:Win32/Yomal!rfn	severe
Trojan:Win32/Znyonm!rfn	severe
Trojan:Win64/AVTamper!rfn	severe
Trojan:Win64/BumbleBee!rfn	severe
Trojan:Win64/CobaltStrike!rfn	severe
Trojan:Win64/DLLHijack!MTB	severe
Trojan:Win64/Emotet!rfn	severe
Trojan:Win64/Emotetcrypt!rfn	severe
Trojan:Win64/EmotetPacker!rfn	severe
Trojan:Win64/LummaStealer.NM!MTB	severe
Trojan:Win64/MalCertPutty!rfn	severe
Trojan:Win64/NightHawk!rfn	severe
Trojan:Win64/Nuitka!MTB	severe
Trojan:Win64/PortStart!rfn	severe
Trojan:Win64/Tedy.SXL!MTB	severe
Trojan:Win64/ZLoaderE!rfn	severe
Trojan:Win64/Zusy!MTB	severe
Trojan:Win64/Zusy!rfn	severe
TrojanDownloader:JS/Qakbot!rfn	severe
TrojanDownloader:Linux/Mirai!MSR	severe
TrojanDownloader:MSIL/AgentTesla!rfn	severe
TrojanDownloader:O97M/Emotet!rfn	severe
TrojanDownloader:PowerShell/Malgent!MSR	severe
TrojanDownloader:Win32/ShortSeek!rfn	severe
VirTool:Java/Meterpreter.A	severe
VirTool:Win32/Sliver!rfn	severe
VirTool:Win32/VBInject!rfn	severe
VirTool:WinNT/Rootkitdrv!rfn	severe