Change logs for security intelligence update version 1.443.227.0

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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

12/20/2025 5:10:20 AM

Added threat detections

Name	Severity
Behavior:Win32/PowDow.DA!MTB	severe
Behavior:Win32/PowDow.DB!MTB	severe
Ransom:Win32/Filecoder.SX!MTB	severe
Trojan:Win32/DarkVNC.DA!MTB	severe
Trojan:Win32/DarkVNC.DB!MTB	severe
Trojan:Win32/Lodap!AMTB	severe
Trojan:Win32/Pernefed!rfn	high
Trojan:Win64/Tedy.DB!MTB	severe

Updated threat detections

Name	Severity
Adware:Win32/Hotbar	high
Backdoor:MSIL/AsyncRat!rfn	severe
Backdoor:PHP/Chopper.E!dha	severe
Backdoor:Win32/Androm.BQ!MTB	severe
Backdoor:Win32/Berbew.AA!MTB	severe
Backdoor:Win32/Padodor.SK!MTB	severe
Backdoor:Win32/Simda.CCJE!MTB	severe
Backdoor:Win32/Tofsee.MAK!MTB	severe
Backdoor:Win64/Supper!rfn	severe
Backdoor:Win64/Vankul!rfn	severe
Behavior:Win32/SuspSafebootM.A	severe
Behavior:Win32/SuspSafebootN.A	severe
Exploit:HTML/IframeRef	severe
Exploit:HTML/Shellcode.G!MSR	severe
Exploit:Win32/CVE-2008-2992!AMTB	severe
HackTool:PHP/Webshell!MSR	high
HackTool:Python/RemoteShell!MSR	high
HackTool:Win32/Keygen	high
HackTool:Win32/Keygen!AMTB	high
HackTool:Win32/Netcat	high
HackTool:Win32/Patcher	high
HackTool:Win32/Patcher!MTB	high
HackTool:Win32/PowersploitHijack.A!dll	high
HackTool:Win32/RemoteAdmin!MTB	high
HackTool:Win32/WNetWatcher!MTB	high
Misleading:Win32/Lodi	high
PWS:Win32/QQpass.B!MTB	severe
Ransom:Linux/Conti!rfn	severe
Ransom:MSIL/Filecoder!rfn	severe
Ransom:Win32/Basta!rfn	severe
Ransom:Win32/DragonForce!rfn	severe
Ransom:Win32/Filecoder!rfn	severe
Ransom:Win32/LockBit!MTB	severe
Ransom:Win32/Ryuk.MKG!MTB	severe
Ransom:Win64/Akira!rfn	severe
Ransom:Win64/BianLian.B!MSR	severe
Ransom:Win64/Mamona!rfn	severe
Trojan:AndroidOS/AVerseFalc!rfn	severe
Trojan:HTML/Nioc!rfn	severe
Trojan:HTML/Phish!MSR	severe
Trojan:HTML/Qakbot!rfn	severe
Trojan:JS/Cryxos.ATMB!MTB	severe
Trojan:JS/QakbotLNK!rfn	severe
Trojan:MacOS/Multiverze	severe
Trojan:MSIL/AgentTesla.ABPF!MTB	severe
Trojan:MSIL/Barys.AR!MTB	severe
Trojan:MSIL/Malgent!MSR	severe
Trojan:MSIL/Razy.PGRZ!MTB	severe
Trojan:O97M/CVE-2016-7262	severe
Trojan:PDF/Phish!MSR	severe
Trojan:PowerShell/Malgent!MSR	severe
Trojan:PowerShell/ReverseShell.HNAA!MTB	severe
Trojan:Python/Multiverze!rfn	severe
Trojan:Script/Metasploit	severe
Trojan:VBS/Emotet!rfn	severe
Trojan:Win32/AgentTesla!rfn	severe
Trojan:Win32/Alevaul!rfn	severe
Trojan:Win32/BlackMoon.NK!MTB	severe
Trojan:Win32/Bluteal!rfn	severe
Trojan:Win32/Casdet!rfn	severe
Trojan:Win32/Cerber.MPI!MTB	severe
Trojan:Win32/Convagent.MKA!MTB	severe
Trojan:Win32/CoreWarrior.DA!MTB	severe
Trojan:Win32/CryInfector.MBFH!MTB	severe
Trojan:Win32/DarkGate!rfn	severe
Trojan:Win32/DllInject!rfn	severe
Trojan:Win32/Doina.MBJE!MTB	severe
Trojan:Win32/DSSDetection	severe
Trojan:Win32/Dynamer!ac	severe
Trojan:Win32/Egairtigado!rfn	severe
Trojan:Win32/Eqtonex!rfn	severe
Trojan:Win32/Etset!rfn	severe
Trojan:Win32/FakeAV.EA!MTB	severe
Trojan:Win32/FakeDoc.AF!MTB	severe
Trojan:Win32/Fareit.VB!MTB	severe
Trojan:Win32/Farfli.AB!MTB	severe
Trojan:Win32/Farfli.AV!MTB	severe
Trojan:Win32/ForestTiger!rfn	severe
Trojan:Win32/GCleaner.STR!MTB	severe
Trojan:Win32/Generic!rfn	severe
Trojan:Win32/GuLoader.RVS!MTB	severe
Trojan:Win32/Injector.YTRE!MTB	severe
Trojan:Win32/IRCBot.EN!MTB	severe
Trojan:Win32/Kepavll!rfn	severe
Trojan:Win32/KeyLogger!rfn	severe
Trojan:Win32/Lauri.ALI!MTB	severe
Trojan:Win32/Lazy.AHE!MTB	severe
Trojan:Win32/Leonem!rfn	severe
Trojan:Win32/Malgent	severe
Trojan:Win32/MalLoader!rfn	severe
Trojan:Win32/Multiverze	severe
Trojan:Win32/Neoreblamy.NRL!MTB	severe
Trojan:Win32/Otfrem.A!MTB	severe
Trojan:Win32/Oyester!rfn	severe
Trojan:Win32/Palevo.MA!MTB	severe
Trojan:Win32/Pikabot!rfn	severe
Trojan:Win32/PlugX.psyP!MTB	severe
Trojan:Win32/Predator!rfn	severe
Trojan:Win32/Qbot!rfn	severe
Trojan:Win32/Remcos!rfn	severe
Trojan:Win32/Remcos.PGR!MTB	severe
Trojan:Win32/Salgorea.C!MTB	severe
Trojan:Win32/Seheq!rfn	severe
Trojan:Win32/Sfuzuan.EN!MTB	severe
Trojan:Win32/ShellcodeLoader.AHD!MTB	severe
Trojan:Win32/SmokeLoader.FT!MTB	severe
Trojan:Win32/Socelars.WE!MTB	severe
Trojan:Win32/StartServ!rfn	severe
Trojan:Win32/StormAttack.A!MTB	severe
Trojan:Win32/Suschil!rfn	severe
Trojan:Win32/Swisyn.ASW!MTB	severe
Trojan:Win32/Tiggre!rfn	severe
Trojan:Win32/Upatre.AMN!MTB	severe
Trojan:Win32/Upatre.MH!MTB	severe
Trojan:Win32/Urelas.AB!MTB	severe
Trojan:Win32/Urelas.JU!MTB	severe
Trojan:Win32/VBClone.GTT!MTB	severe
Trojan:Win32/Vilsel.A!MTB	severe
Trojan:Win32/Vundo.AHC!MTB	severe
Trojan:Win32/Yomal!rfn	severe
Trojan:Win32/Zbot.rmwh!MTB	severe
Trojan:Win32/Zbot.SD!MTB	severe
Trojan:Win32/Znyonm!rfn	severe
Trojan:Win32/Zusy!rfn	severe
Trojan:Win32/Zusy.BL!MTB	severe
Trojan:Win32/Zusy.DV!MTB	severe
Trojan:Win32/Zusy.ED!MTB	severe
Trojan:Win32/Zusy.LMV!MTB	severe
Trojan:Win32/Zusy.MRA!MTB	severe
Trojan:Win32/Zusy.SQ!MTB	severe
Trojan:Win64/BlackWidow!rfn	severe
Trojan:Win64/BruteRatel!rfn	severe
Trojan:Win64/BumbleBee.CA!MTB	severe
Trojan:Win64/Cobaltstrike.AG!MTB	severe
Trojan:Win64/CobaltStrike.CG!MTB	severe
Trojan:Win64/Convagent.LMA!MTB	severe
Trojan:Win64/Emotetcrypt!rfn	severe
Trojan:Win64/EmotetPacker!rfn	severe
Trojan:Win64/Grandoreiro.psyP!MTB	severe
Trojan:Win64/GravityRat.AGRV!MTB	severe
Trojan:Win64/Latrodecturs!rfn	severe
Trojan:Win64/Latrodectus!rfn	severe
Trojan:Win64/Lazy.RR!MTB	severe
Trojan:Win64/LummaStealer.PGLN!MTB	severe
Trojan:Win64/Malgent!MSR	severe
Trojan:Win64/Midie.SN!MTB	severe
Trojan:Win64/Mikey.MMT!MTB	severe
Trojan:Win64/Oyster!rfn	severe
Trojan:Win64/Rhadamanthys.NRF!MTB	severe
Trojan:Win64/Rhadamanthys.NRI!MTB	severe
Trojan:Win64/Rhadamanthys.RH!MTB	severe
Trojan:Win64/ShellCodeRunner.GVC!MTB	severe
Trojan:Win64/ShellcodeRunner.MKA!MTB	severe
Trojan:Win64/Splinter!rfn	severe
Trojan:Win64/SpyLoader!rfn	severe
Trojan:Win64/Stealer.MKA!MTB	severe
Trojan:Win64/SvcStealer.RJP!MTB	severe
Trojan:Win64/Tedy.PGT!MTB	severe
Trojan:Win64/TurtleLoader!rfn	severe
Trojan:Win64/Ulise.AHC!MTB	severe
Trojan:Win64/Vidar.AHE!MTB	severe
Trojan:Win64/XmrigMiner.RP!MTB	severe
Trojan:Win64/Xworm.ZBO!MTB	severe
TrojanDownloader:MSIL/Lazy.MK!MTB	severe
TrojanDownloader:Win32/Agent!rfn	severe
TrojanDownloader:Win32/Andromeda.SIBC!MTB	severe
TrojanDownloader:Win32/Pipsek!rfn	severe
TrojanDownloader:Win64/Dlass.GVD!MTB	severe
TrojanDropper:Win32/Jushed.AS!MTB	severe
TrojanDropper:Win32/Muldrop.V!MTB	severe
TrojanDropper:Win32/Salgorea.AI!MTB	severe
VirTool:JS/Obfuscator.Q	severe
VirTool:MSIL/Aikaantivm!rfn	severe
Worm:Win32/Ainslot!rfn	severe
Worm:Win32/Capside.ARR!MTB	severe
Worm:Win32/Ganelp.AF!MTB	severe
Worm:Win32/Mofksys!rfn	severe
Worm:Win32/Mofksys.NA!MTB	severe
Worm:Win32/Mofksys.RND!MTB	severe
Worm:Win32/Sfone.ECP!MTB	severe