Change logs for security intelligence update version 1.443.772.0

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

1/20/2026 11:44:51 PM

Added threat detections

Name	Severity
Adware:AndroidOS/SAgnt!AMTB	high
Backdoor:Linux/XillenStealer.A	severe
Backdoor:Linux/XillenStealer.D	severe
HackTool:MSIL/BruteForcer!MTB	high
HackTool:MSIL/Malgent!MTB	high
Ransom:MSIL/Lazy!MTB	severe
Ransom:MSIL/Lockbit!MTB	severe
Ransom:MSIL/Loki!MTB	severe
Ransom:Win64/CipherWolf!MTB	severe
Ransom:Win64/Crypmodng!MTB	severe
Trojan:AndroidOS/SAgent!MSR	severe
Trojan:JS/Phish.SLZI!MTB	severe
Trojan:JS/Rossetaph!MSR	severe
Trojan:Linux/ShyCobra.A!dha	severe
Trojan:Linux/ShyCobra.B!dha	severe
Trojan:Linux/ShyCobra.C!dha	severe
Trojan:MSIL/Coinstealer!MTB	severe
Trojan:PowerShell/Boxter.SLZC!MTB	severe
Trojan:Python/ModeloRAT!MSR	severe
Trojan:VBS/Rossetaph!MSR	severe
Trojan:Win32/GCleaner.NNS!MTB	severe
Trojan:Win32/Qukart.AQU!MTB	severe
Trojan:Win32/ShellLoader!MTB	severe
Trojan:Win64/CryptoStealer!MTB	severe
Trojan:Win64/Gomal!MTB	severe
Trojan:Win64/GreedyBear!MTB	severe
Trojan:Win64/Pypykatz!MSR	severe
Trojan:Win64/SheLoader.ABSL!MTB	severe
TrojanDownloader:Linux/ShellAgnt!MSR	severe
TrojanDownloader:Win64/CoinMiner!MTB	severe
Worm:Win32/Babar!MTB	severe

Updated threat detections

Name	Severity
Adware:Win32/ConvertAd!AMTB	high
Adware:Win32/OpenSUpdater	high
Backdoor:Linux/Mirai!MSR	severe
Behavior:Win32/CVE-2026-23550.A!MTB	severe
Behavior:Win32/ReactJSExploit.A!MTB	severe
Behavior:Win32/ReactJSExploit.B!MTB	severe
Behavior:Win32/ReactJSExploit.Z!MTB	severe
Behavior:Win32/RegistryExfil.Z!MTB	severe
Behavior:Win32/SuspLibCurl.Z!MTB	severe
BrowserModifier:Win32/MediaArena	high
HackTool:MSIL/AutoKMS!MTB	high
HackTool:Win32/Malgent!MSR	high
HackTool:Win64/Malgent!MSR	high
HackTool:Win64/MeshAgent!MTB	high
HackTool:Win64/PSWDump!MTB	high
HackTool:Win64/Tedy!MTB	high
Misleading:Win32/Lodi	high
Misleading:Win32/Lodi!AMTB	high
Misleading:Win32/Malgent!AMTB	high
Misleading:Win32/Softeallion	high
Misleading:Win64/Malgent!AMTB	high
PWS:HTML/Phish!MSR	severe
Ransom:Win64/BlackByte!MTB	severe
Ransom:Win64/Encoder!MTB	severe
Trojan:AndroidOS/SAgnt!MSR	severe
Trojan:AutoIt/Malgent!MTB	severe
Trojan:BAT/KillAV!MTB	severe
Trojan:HTML/Obfuse!MTB	severe
Trojan:HTML/Phish!MSR	severe
Trojan:HTML/Redirector.DCG!MTB	severe
Trojan:Java/SAgnt!MSR	severe
Trojan:JS/Malgent!MSR	severe
Trojan:JS/Obfus!MTB	severe
Trojan:JS/Obfuse!MSR	severe
Trojan:JS/Phish!MSR	severe
Trojan:Linux/SAgnt!MSR	severe
Trojan:MSIL/AgentTesla!MTB	severe
Trojan:MSIL/Asyncrat!MTB	severe
Trojan:MSIL/barys!MTB	severe
Trojan:MSIL/Clicker!MTB	severe
Trojan:MSIL/DiscordStealer!MTB	severe
Trojan:MSIL/Fragtor!MTB	severe
Trojan:MSIL/Heracles!MTB	severe
Trojan:MSIL/Injector!MTB	severe
Trojan:MSIL/Jalapeno!MTB	severe
Trojan:MSIL/Kryptic!MTB	severe
Trojan:MSIL/Malgent!MSR	severe
Trojan:MSIL/Malgent!MTB	severe
Trojan:MSIL/ShellcodeInject.S!MTB	severe
Trojan:MSIL/Strictor!MTB	severe
Trojan:MSIL/Xworm!MTB	severe
Trojan:MSIL/Zilla.AB!MTB	severe
Trojan:O97M/Phish!MSR	severe
Trojan:PDF/Malgent!MSR	severe
Trojan:PDF/Phish!MSR	severe
Trojan:PDF/Phish!MTB	severe
Trojan:PowerShell/Malgent!MSR	severe
Trojan:PowerShell/Obfuse!MSR	severe
Trojan:Python/Keylogger!MTB	severe
Trojan:Python/Malgent!MSR	severe
Trojan:Script/Malgent!MSR	severe
Trojan:Script/Obfuse!MSR	severe
Trojan:VBS/Malgent!MSR	severe
Trojan:VBS/Obfus!MTB	severe
Trojan:VBS/Obfuse!MSR	severe
Trojan:VBS/Obfuse!MTB	severe
Trojan:VBS/Pterodo!MTB	severe
Trojan:VBS/Valyria!MTB	severe
Trojan:Win32/Agentesla!MTB	severe
Trojan:Win32/AgentTesla!MTB	severe
Trojan:Win32/Babadeda!MTB	severe
Trojan:Win32/Barys!MTB	severe
Trojan:Win32/BlackMoon!MTB	severe
Trojan:Win32/Cerbu!MTB	severe
Trojan:Win32/CoinMiner!MTB	severe
Trojan:Win32/Cryptinject!MTB	severe
Trojan:Win32/DllHijack!MTB	severe
Trojan:Win32/Flystudio!MTB	severe
Trojan:Win32/Fragtor!MTB	severe
Trojan:Win32/Jaik!MTB	severe
Trojan:Win32/Lazy!MTB	severe
Trojan:Win32/Leonem!rfn	severe
Trojan:Win32/LummaStealer!MTB	severe
Trojan:Win32/LummaStealer.Z!MTB	severe
Trojan:Win32/Malgent!MSR	severe
Trojan:Win32/Malgent!MTB	severe
Trojan:Win32/Neoreblamy!MTB	severe
Trojan:Win32/Neoreblamy.NIE!MTB	severe
Trojan:Win32/Neoreblamy.NJU!MTB	severe
Trojan:Win32/Neoreklami!MTB	severe
Trojan:Win32/Nuitka!MTB	severe
Trojan:Win32/OffLoader!MTB	severe
Trojan:Win32/Phish!MTB	severe
Trojan:Win32/RedLineStealer!MTB	severe
Trojan:Win32/Reline!MTB	severe
Trojan:Win32/Remcos!MTB	severe
Trojan:Win32/SalatStealer.GTV!MTB	severe
Trojan:Win32/Stealer!MTB	severe
Trojan:Win32/Tedy!MTB	severe
Trojan:Win32/VMProtect!MTB	severe
Trojan:Win32/WinLNK!MSR	severe
Trojan:Win32/XWorm!MTB	severe
Trojan:Win32/Zbot!MTB	severe
Trojan:Win32/Zusy!MTB	severe
Trojan:Win64/Aotera!MTB	severe
Trojan:Win64/AsyncRAT!MTB	severe
Trojan:Win64/Barys!MTB	severe
Trojan:Win64/BlackMoon!MTB	severe
Trojan:Win64/ClipBanker!MTB	severe
Trojan:Win64/CoinMiner!MTB	severe
Trojan:Win64/Crypt!MTB	severe
Trojan:Win64/DLLHijack!MTB	severe
Trojan:Win64/Filecoder!MSR	severe
Trojan:Win64/KeyLogger!MTB	severe
Trojan:Win64/Kryptik!MTB	severe
Trojan:Win64/Lazy!MTB	severe
Trojan:Win64/Lotok!MTB	severe
Trojan:Win64/LummaStealer!MTB	severe
Trojan:Win64/Malgent!MSR	severe
Trojan:Win64/Malgent!MTB	severe
Trojan:Win64/MalPack!MTB	severe
Trojan:Win64/Mikey!MTB	severe
Trojan:Win64/Nuitka!MTB	severe
Trojan:Win64/PureLogStealer!MTB	severe
Trojan:Win64/Pypykatz!MTB	severe
Trojan:Win64/Remcos!MTB	severe
Trojan:Win64/Rhadamanthys!MTB	severe
Trojan:Win64/Rhadamanthys.RR!MTB	severe
Trojan:Win64/RustyStealer!MTB	severe
Trojan:Win64/SalatStealer!MTB	severe
Trojan:Win64/ShellcodeRunner!MTB	severe
Trojan:Win64/ShellcodeRunner.NPB!MTB	severe
Trojan:Win64/SpyLoader!MTB	severe
Trojan:Win64/Stealc!MTB	severe
Trojan:Win64/Stealc.GA!MTB	severe
Trojan:Win64/Stealerc!MTB	severe
Trojan:Win64/Tedy!MTB	severe
Trojan:Win64/Tedy.GZD!MTB	severe
Trojan:Win64/UACBypassExp!MTB	severe
Trojan:Win64/Vidar!MTB	severe
Trojan:Win64/VMProtect!MTB	severe
Trojan:Win64/Wingo!MTB	severe
Trojan:Win64/XWorm!MTB	severe
Trojan:Win64/XWormRAT!MTB	severe
Trojan:Win64/Zusy!MTB	severe
TrojanDownloader:JS/Malgent!MSR	severe
TrojanDownloader:PowerShell/Malgent!MSR	severe
TrojanDownloader:Win32/AutoitInject!MTB	severe
TrojanDownloader:Win32/Rugmi!MTB	severe
TrojanDropper:JS/Malgent!MSR	severe
TrojanDropper:Win32/Malgent!MSR	severe