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Change logs for security intelligence update version 1.451.269.0

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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Released on

6/4/2026 11:35:29 PM

Added threat detections

Name Severity
Trojan:MSIL/ShellcodeRunner.CLS!MTB severe
Trojan:Script/Stealer.AXVB!MTB severe
Trojan:Script/Stealer.AYVB!MTB severe
Trojan:Win32/ClickFix.ONZ!MTB severe

Updated threat detections

Name Severity
Backdoor:Linux/Multiverze!rfn severe
Backdoor:MSIL/AsyncRAT!rfn severe
Backdoor:Win32/DarkGate!rfn severe
Behavior:Win32/BruteRatel.MK!ems severe
Behavior:Win32/SliverBeacon.A!nri severe
Behavior:Win32/SliverC2mTLS.A!nri severe
Behavior:Win32/SliverWebShell.A!nri severe
Behavior:Win32/SusModuleStomp.MK severe
Behavior:Win32/SuspAnydeskInstall.A!ofn severe
Behavior:Win32/SuspAnydeskMsiInstall.A!ofn severe
Behavior:Win32/SuspAnydeskUnattended.A!ofn severe
Behavior:Win32/SuspBrowserAppDirSideLoad.A severe
Behavior:Win32/SuspIisShellSpawn.AM severe
Behavior:Win32/SuspRemoteLsassDumpViaWinRM.A severe
Behavior:Win32/SuspWinRMLateralMove.A severe
Behavior:Win32/SuspWinRMLateralToolingChild.A severe
Behavior:Win32/SuspWinRMServerEnable.A severe
Behavior:Win32/WinRMCredentialAccess.WT severe
Behavior:Win32/WinRMLolbinExec.WT severe
Behavior:Win32/WinRMPayloadDrop.WT severe
Exploit:Win32/Tudimons.A!dha severe
HackTool:Python/Impacket!AMTB high
HackTool:Win32/IEPassview high
HackTool:Win64/Mikey!MTB high
HackTool:Win64/Patcher!MSR high
Ransom:Win32/BlackCat!rfn severe
Ransom:Win64/Basta!rfn severe
Trojan:AndroidOS/AVerseFalc!rfn severe
Trojan:BAT/LNK_DarkGate!rfn severe
Trojan:BAT/Qakbot!rfn severe
Trojan:HTML/Pterodo!rfn severe
Trojan:HTML/Qakbot!rfn severe
Trojan:JS/AsyncRAT.SI!MTB severe
Trojan:JS/QakbotLNK!rfn severe
Trojan:JS/Ursnif!MTB severe
Trojan:JS/Ursnif!rfn severe
Trojan:MSIL/Zusy.ARR!MTB severe
Trojan:O97M/DDownloader!rfn severe
Trojan:PowerShell/Obfuse!MSR severe
Trojan:PowerShell/Pterodo!rfn severe
Trojan:PowerShell/QakBot!rfn severe
Trojan:Script/Malgent!MSR severe
Trojan:VBS/Emotet!rfn severe
Trojan:VBS/Qakbot!rfn severe
Trojan:Win32/Alevaul!rfn severe
Trojan:Win32/Amadey.AMY!MTB severe
Trojan:Win32/AutoitInject.C!MTB severe
Trojan:Win32/AutoitShellInj!rfn severe
Trojan:Win32/BlackMoon.NK!MTB severe
Trojan:Win32/DarkGate!rfn severe
Trojan:Win32/DllInject!rfn severe
Trojan:Win32/Egairtigado!rfn severe
Trojan:Win32/Fareit.VB!MTB severe
Trojan:Win32/FlyStudio.PGC!MTB severe
Trojan:Win32/GhostSocks!rfn severe
Trojan:Win32/Kazadm.A!MTB severe
Trojan:Win32/Kepavll!rfn severe
Trojan:Win32/Leonem!rfn severe
Trojan:Win32/Malgent severe
Trojan:Win32/MereTam!rfn severe
Trojan:Win32/Occamy.C3C severe
Trojan:Win32/Qakbot!rfn severe
Trojan:Win32/Qwexlafiba!rfn severe
Trojan:Win32/Ravartar!rfn severe
Trojan:Win32/Seheq!rfn severe
Trojan:Win32/Supma.A severe
Trojan:Win32/Suschil!rfn severe
Trojan:Win32/VBClone.GTT!MTB severe
Trojan:Win32/VBClone.TAAA!MTB severe
Trojan:Win32/Yomal!rfn severe
Trojan:Win32/Znyonm!rfn severe
Trojan:Win64/BruteRatel.MK!!BruteRatel.MK!ems severe
Trojan:Win64/CoinMiner!rfn severe
Trojan:Win64/Dapato.ARR!MTB severe
Trojan:Win64/Emotetcrypt!rfn severe
Trojan:Win64/IcedID!rfn severe
Trojan:Win64/ShellcodeRunner.SXP!MTB severe
Trojan:Win64/Tedy!MTB severe
Trojan:Win64/XMRig.PA!MTB severe
TrojanDownloader:BAT/QakBotLoader!rfn severe
TrojanDownloader:HTML/Tnega!rfn severe
TrojanDownloader:JS/Qakbot!rfn severe
TrojanDownloader:O97M/Emotet!rfn severe
TrojanDownloader:VBS/Malgent!MSR severe
TrojanDownloader:Win32/Tnega severe
TrojanDownloader:Win64/BumbleBee!rfn severe
TrojanDropper:O97M/Agent!AMTB severe
TrojanDropper:PowerShell/PowerSploit.S!MSR severe
VirTool:PHP/Remeshelsz.A!AMTB severe
Worm:Win32/Sohanad!rfn severe