Change logs for security intelligence update version 1.451.167.0

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.

Looking for the latest update? Download the latest update

Security intelligence update version

Released on

5/29/2026 4:48:44 PM

Added threat detections

Name	Severity
Ransom:Win64/Hydracrypt!MTB	severe
Trojan:BAT/LotusWiper.AA!AMTB	severe
Trojan:BAT/LotusWiper.AB!AMTB	severe
Trojan:HTML/Phish.GXTN!MTB	severe
Trojan:INF/Cmstpass!AMTB	severe
Trojan:JS/FormBook.ZYB!MTB	severe
Trojan:JS/Obfuse.ABQ!MTB	severe
Trojan:JS/Stealer.ANVB!MTB	severe
Trojan:JS/Stealer.AOVB!MTB	severe
Trojan:JS/Stealer.PA!MTB	severe
Trojan:MSIL/Astraea.GDM!MTB	severe
Trojan:MSIL/PureLogStealer.ZSC!MTB	severe
Trojan:MSIL/ShellcodeRunner.SLCS!MTB	severe
Trojan:PowerShell/Powdow.AI!MTB	severe
Trojan:PowerShell/Remcos.NWM!MTB	severe
Trojan:Win32/HoneyMyte.AHM!MTB	severe
Trojan:Win64/GoAccountChecker!MTB	severe
Trojan:Win64/Gorat!MTB	severe
Trojan:Win64/Remcos.A!AMTB	severe
Trojan:Win64/Remcos.B!AMTB	severe
Trojan:Win64/XWorm.B!AMTB	severe
TrojanDownloader:VBS/Obfuse.NWA!MTB	severe

Updated threat detections

Name	Severity
Backdoor:Linux/Mirai!rfn	severe
Backdoor:MSIL/DCRat!MTB	severe
Backdoor:MSIL/Nanocore!rfn	severe
Exploit:O97M/CVE-2017-0199.SZE!MTB	severe
HackTool:Win32/crack	high
HackTool:Win32/Crack!MTB	high
HackTool:Win32/DllInjector!MTB	high
HackTool:Win32/Netpasss!MSR	high
HackTool:Win32/Netpasss.AB!MTB	high
HackTool:Win32/Ntscan	high
HackTool:Win32/RemoteAdmin!rfn	high
PWS:MSIL/Browsstl!rfn	severe
PWS:MSIL/RedLine!rfn	severe
PWS:MSIL/Stealer!rfn	severe
Ransom:BAT/DisableDefender.A!dha	severe
Ransom:Win32/CerberCrypt!MTB	severe
Ransom:Win32/Encoder!MTB	severe
Ransom:Win32/Lockbit.RPA!MTB	severe
Ransom:Win64/Basta!rfn	severe
SupportScam:Win32/Screcwon!MSR	severe
Trojan:AndroidOS/AVerseFalc!rfn	severe
Trojan:BAT/Obfuse!MTB	severe
Trojan:HTML/Phish.AHA!MTB	severe
Trojan:HTML/Redirector!MTB	severe
Trojan:JS/Obfuse.ABO!MTB	severe
Trojan:JS/Qakbot!rfn	severe
Trojan:Linux/Multiverze!rfn	severe
Trojan:MSIL/AgentTesla!rfn	severe
Trojan:MSIL/AgentTesla.ABPF!MTB	severe
Trojan:MSIL/barys!MTB	severe
Trojan:MSIL/Barys.ARS!MTB	severe
Trojan:MSIL/CoinMiner!rfn	severe
Trojan:MSIL/DCRat.ADR!MTB	severe
Trojan:MSIL/Heracles!MTB	severe
Trojan:MSIL/Rozena!MTB	severe
Trojan:MSIL/Strictor!MTB	severe
Trojan:O97M/DDownloader!rfn	severe
Trojan:PowerShell/sLoad.F!lnk	severe
Trojan:Python/Bobik.EB!MTB	severe
Trojan:Python/MuddyWater.DB!MTB	severe
Trojan:Python/Tedy!MTB	severe
Trojan:Script/CoinMiner!rfn	severe
Trojan:Script/Malgent!MSR	severe
Trojan:Script/Multiverze!rfn	severe
Trojan:VBS/Emotet!rfn	severe
Trojan:VBS/GuLoader.SNY!MTB	severe
Trojan:VBS/Pterodo!rfn	severe
Trojan:Win32/Acll!rfn	severe
Trojan:Win32/Alevaul!rfn	severe
Trojan:Win32/AutoitInject.SPB!MTB	severe
Trojan:Win32/Babadeda.AME!MTB	severe
Trojan:Win32/Copak.GPX!MTB	severe
Trojan:Win32/Diple!rfn	severe
Trojan:Win32/Egairtigado!rfn	severe
Trojan:Win32/Etset!rfn	severe
Trojan:Win32/Fareit.VB!MTB	severe
Trojan:Win32/Fauppod!rfn	severe
Trojan:Win32/Flystudio!MTB	severe
Trojan:Win32/FlyStudio.PGC!MTB	severe
Trojan:Win32/FormBook!rfn	severe
Trojan:Win32/Injector!MTB	severe
Trojan:Win32/IRCBot!rfn	severe
Trojan:Win32/Kepavll!rfn	severe
Trojan:Win32/Leonem!rfn	severe
Trojan:Win32/Malgent	severe
Trojan:Win32/Malgent!MSR	severe
Trojan:Win32/Malgent!MTB	severe
Trojan:Win32/MereTam!rfn	severe
Trojan:Win32/Pomal!rfn	severe
Trojan:Win32/ProcessHijack.GTM!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/Skeeyah	severe
Trojan:Win32/Suschil!rfn	severe
Trojan:Win32/Tedy!MTB	severe
Trojan:Win32/VMProtect!MTB	severe
Trojan:Win32/Znyonm!rfn	severe
Trojan:Win32/Zusy!MTB	severe
Trojan:Win32/Zusy.PAA!MTB	severe
Trojan:Win64/Barys!MTB	severe
Trojan:Win64/CobaltStrike!rfn	severe
Trojan:Win64/CoinMiner!rfn	severe
Trojan:Win64/CryptInject!rfn	severe
Trojan:Win64/Curlygate!MTB	severe
Trojan:Win64/DaveShell!MTB	severe
Trojan:Win64/EmotetPacker!rfn	severe
Trojan:Win64/FlyStudio!MTB	severe
Trojan:Win64/GoObfus!MTB	severe
Trojan:Win64/GreedyBear!MTB	severe
Trojan:Win64/InfoStealer!MSR	severe
Trojan:Win64/Injector!MTB	severe
Trojan:Win64/Lazy!MTB	severe
Trojan:Win64/Lazy.LRL!MTB	severe
Trojan:Win64/Malgent!MSR	severe
Trojan:Win64/Maloder!rfn	severe
Trojan:Win64/Mikey!MTB	severe
Trojan:Win64/NightHawk!rfn	severe
Trojan:Win64/Phorpiex!MTB	severe
Trojan:Win64/RanPacker!rfn	severe
Trojan:Win64/Rozena.AB!MTB	severe
Trojan:Win64/Sadbridge!MTB	severe
Trojan:Win64/ShellcodeRunner!MTB	severe
Trojan:Win64/ShellcodeRunner!rfn	severe
Trojan:Win64/Spyboy!rfn	severe
Trojan:Win64/Staser.LMA!MTB	severe
Trojan:Win64/Stealer!MSR	severe
Trojan:Win64/Tedy!MTB	severe
Trojan:Win64/Vidar!MTB	severe
Trojan:Win64/Vidar!rfn	severe
Trojan:Win64/VMProtect!MTB	severe
Trojan:Win64/VulnDriver.LVK!MTB	severe
Trojan:Win64/XMRig.PA!MTB	severe
TrojanDownloader:JS/Qakbot!rfn	severe
TrojanDownloader:O97M/Emotet!rfn	severe
TrojanDownloader:SH/SAgnt!MSR	severe
TrojanDownloader:Win32/Fragtor.ARAZ!MTB	severe
TrojanDownloader:Win64/Malgent!MSR	severe
Worm:Win32/Ganelp.AF!MTB	severe
Worm:Win32/Mofksys!rfn	severe