Change logs for security intelligence update version 1.445.233.0

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

2/24/2026 10:47:37 PM

Added threat detections

Name	Severity
Exploit:HTML/CVE-2011-2371!MSR	severe
Exploit:HTML/CVE-2016-1960!MSR	severe
Exploit:O97M/CVE-2017-0199.VOAH	severe
Ransom:Win64/Sicarii!MTB	severe
Trojan:JS/PhantomStealer.SI!MTB	severe
Trojan:JS/Redirector.AFRB!MTB	severe
Trojan:MSIL/AsyncRat.AERB!MTB	severe

Updated threat detections

Name	Severity
Adware:Win32/Trickler.A!MTB	high
Backdoor:Linux/Mirai!rfn	severe
Backdoor:MSIL/Bladabindi!rfn	severe
Backdoor:Win32/Berbew.AA!MTB	severe
Exploit:Win32/Tudimons.A!dha	severe
FriendlyFiles	low
HackTool:Win32/Chisel.A	high
Misleading:Win32/Malgent!AMTB	high
Ransom:Win32/BlackCat!rfn	severe
Ransom:Win32/Conti.AD!MTB	severe
Trojan:AndroidOS/AVerseFalc!rfn	severe
Trojan:AndroidOS/Multiverze	severe
Trojan:BAT/KillAV.PGKA!MTB	severe
Trojan:BAT/LNK_DarkGate!rfn	severe
Trojan:BAT/Qakbot!rfn	severe
Trojan:HTML/Phish!MSR	severe
Trojan:HTML/Phish.SLBE!MTB	severe
Trojan:HTML/Phish.SLPC!MTB	severe
Trojan:HTML/Qakbot!rfn	severe
Trojan:HTML/Redirector.SEU!MTB	severe
Trojan:JS/Nemucod!MTB	severe
Trojan:JS/Obfuse.MK!MTB	severe
Trojan:JS/Pterodo!rfn	severe
Trojan:JS/Qakbot!rfn	severe
Trojan:JS/QakbotLNK!rfn	severe
Trojan:JS/Redirector.ABOB!MTB	severe
Trojan:Linux/Multiverze!rfn	severe
Trojan:O97M/DDownloader!rfn	severe
Trojan:PowerShell/Pterodo!rfn	severe
Trojan:Python/Multiverze!rfn	severe
Trojan:VBS/Emotet!rfn	severe
Trojan:VBS/Qakbot!rfn	severe
Trojan:Win32/Alevaul!rfn	severe
Trojan:Win32/AutoitShellInj.A!MTB	severe
Trojan:Win32/AutoitShellInj.EN!MTB	severe
Trojan:Win32/BlackMoon.BAA!MTB	severe
Trojan:Win32/Blihan.MA!MTB	severe
Trojan:Win32/ClickFix.ZGA	severe
Trojan:Win32/CoreWarrior.DA!MTB	severe
Trojan:Win32/CryptInject!rfn	severe
Trojan:Win32/DllInject!rfn	severe
Trojan:Win32/Dostre.CA!MTB	severe
Trojan:Win32/Egairtigado!rfn	severe
Trojan:Win32/Etset!rfn	severe
Trojan:Win32/Kepavll!rfn	severe
Trojan:Win32/KoiLoader!rfn	severe
Trojan:Win32/Latrodectus!rfn	severe
Trojan:Win32/Leonem!rfn	severe
Trojan:Win32/Malgent	severe
Trojan:Win32/Malgent!MSR	severe
Trojan:Win32/Nukesped.MK!MTB	severe
Trojan:Win32/Pantera!rfn	severe
Trojan:Win32/Penguish!rfn	severe
Trojan:Win32/Pomal!rfn	severe
Trojan:Win32/Qakbot!rfn	severe
Trojan:Win32/Qukart.ASO!MTB	severe
Trojan:Win32/Rifdoor.RA!MTB	severe
Trojan:Win32/Seheq!rfn	severe
Trojan:Win32/SelfDel.A!MTB	severe
Trojan:Win32/Shellara!rfn	severe
Trojan:Win32/Suloc!rfn	severe
Trojan:Win32/Suschil!rfn	severe
Trojan:Win32/Swisyn.ADA!MTB	severe
Trojan:Win32/Vidar.MCQ!MTB	severe
Trojan:Win32/VMProtect!MTB	severe
Trojan:Win32/Yomal!rfn	severe
Trojan:Win32/Zbot.HBAI!MTB	severe
Trojan:Win32/Zusy.BL!MTB	severe
Trojan:Win32/Zusy.MR!MTB	severe
Trojan:Win64/CobaltStrike!MTB	severe
Trojan:Win64/Crypmodadv.ASG!MTB	severe
Trojan:Win64/Cymulate.ACM!MTB	severe
Trojan:Win64/Malgent!MSR	severe
Trojan:Win64/Mikey.GXV!MTB	severe
Trojan:Win64/MuddyWater!MTB	severe
Trojan:Win64/TransferLoader!rfn	severe
Trojan:Win64/VMProtect!MTB	severe
TrojanClicker:JS/Faceliker.ARA!MTB	severe
TrojanDownloader:BAT/QakBotLoader!rfn	severe
TrojanDownloader:JS/Qakbot!rfn	severe
TrojanDownloader:O97M/Emotet!rfn	severe
TrojanDownloader:PowerShell/Obfuse!rfn	severe
TrojanSpy:Win32/Banker!AMTB	severe