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Change logs for security intelligence update version 1.459.55.0

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

9/5/2026 12:35:24 AM

Added threat detections

Name Severity
Exploit:Win32/AppDomainMgrAssemblyHijack.AM severe
Exploit:Win32/AppDomainMgrConfigHijack.AM severe
Ransom:MSIL/CryptCostura!rfn severe
Ransom:MSIL/Imps!MTB severe
Trojan:HTML/FakeExpiry.CD!atmn severe
Trojan:HTML/FakeLogin.EO!atmn severe
Trojan:HTML/Redirector.BQ!atmn severe
Trojan:MSIL/Benin!MTB severe
Trojan:MSIL/Bobik.AA!MTB severe
Trojan:MSIL/ClipBanker.KK!MTB severe
Trojan:MSIL/DarkCloud.PD!MTB severe
Trojan:MSIL/Zusy.AA!MTB severe
Trojan:NPM/Stealere!AMTB severe
Trojan:PowerShell/Boxter.GB!MTB severe
Trojan:PowerShell/Boxter.GD!MTB severe
Trojan:PowerShell/Boxter.GE!MTB severe
Trojan:PowerShell/Boxter.GF!MTB severe
Trojan:PowerShell/Obfuse.WZ!MTB severe
Trojan:VBS/Boxter.GC!MTB severe
Trojan:Win32/DllHijackZ.Z!MTB severe
Trojan:Win32/StealC.Z!sms severe
Trojan:Win32/WinLNK.XJ!MTB severe
Trojan:Win64/AgentB.AA!MTB severe
Trojan:Win64/Doina.AA!MTB severe
Trojan:Win64/Doina.SA!MTB severe
Trojan:Win64/InfoStealer.AA!MTB severe
Trojan:Win64/Lazy.AA!MTB severe
Trojan:Win64/Palevo.GV!MTB severe
Trojan:Win64/Posprefer.PP!MTB severe
Trojan:Win64/SquidLoader.PS!MTB severe
Trojan:Win64/Yephiler.A!MTB severe

Updated threat detections

Name Severity
Adware:MacOS/Multiverze!rfn high
Adware:Win32/Tnega high
Backdoor:Linux/Dakkatoni!rfn severe
Backdoor:Linux/Dakkatoni.az!MTB severe
Backdoor:MSIL/XWormRAT!rfn severe
Backdoor:PHP/OrbWS!rfn severe
Backdoor:PHP/Remoteshell.V severe
Backdoor:PHP/Webshell!rfn severe
Backdoor:Python/Meterpreter.B severe
Backdoor:Win32/Koceg!rfn severe
Backdoor:Win64/BruteRatel!rfn severe
Backdoor:Win64/Noiserv!rfn severe
Behavior:Win32/EncryptTarget.E severe
Behavior:Win32/Persistence.Registry.TimeProvider.B severe
Behavior:Win32/PicusFirewallDisable.A severe
Behavior:Win32/PicusPsExecSimulation.A severe
Behavior:Win32/PicusServicePersistence.A severe
Behavior:Win32/PicusSignedBinaryTempDllLoad.A severe
Behavior:Win32/PicusTempJscriptRpc.A severe
Exploit:JS/CVE-2020-16040.B severe
Exploit:JS/ShellCode!rfn severe
Exploit:Python/Shellcode!AMTB severe
Exploit:Win64/CVE-2022-3699.B!MSR severe
HackTool:AndroidOS/Mesploit!rfn high
HackTool:PHP/Phish!AMTB high
HackTool:PowerShell/Powersploit high
HackTool:PowerShell/PowerSploit.F high
HackTool:Python/Impacket!MSR high
HackTool:Python/Impacket!MTB high
HackTool:Python/Impacket.AAM high
HackTool:Python/Impacket.AB high
HackTool:Python/Multiverze!rfn high
HackTool:Win32/Activator!AMTB high
HackTool:Win32/crack high
HackTool:Win32/Crack!MTB high
HackTool:Win32/Keygen high
HackTool:Win32/Meshagent.MBZ!MTB high
HackTool:Win32/Ntscan high
HackTool:Win32/PowersploitHijack.A!dll high
HackTool:Win32/Tnega high
Misleading:Win32/Lodi high
Program:MacOS/Multiverze!rfn high
Ransom:Win32/BabukLoader!rfn severe
Ransom:Win32/Inc!rfn severe
Ransom:Win32/Royal!rfn severe
Ransom:Win64/AzovCrypt.PA!MTB severe
Ransom:Win64/Encoder!MTB severe
Ransom:Win64/GunraCrypt!rfn severe
Spyware:Script/Multiverze!rfn high
Trojan:AndroidOS/Autopay!rfn severe
Trojan:AndroidOS/AVerseFalc!rfn severe
Trojan:AndroidOS/Banker!rfn severe
Trojan:AndroidOS/BTMOBRat!rfn severe
Trojan:AndroidOS/FakeApp!rfn severe
Trojan:AndroidOS/Spynote!rfn severe
Trojan:BAT/LNK_DarkGate!rfn severe
Trojan:BAT/Qakbot!rfn severe
Trojan:HTML/Redirector.PH!MTB severe
Trojan:JS/Cryxos!rfn severe
Trojan:JS/Latrodectus!rfn severe
Trojan:JS/QakbotLNK!rfn severe
Trojan:Linux/Multiverze!rfn severe
Trojan:MSIL/Bladabindi!AMTB severe
Trojan:MSIL/Crypt!MTB severe
Trojan:MSIL/Dapato!MTB severe
Trojan:MSIL/Lazy!rfn severe
Trojan:MSIL/MsilHeracles!MTB severe
Trojan:MSIL/r77RootKit!rfn severe
Trojan:MSIL/Zusy!rfn severe
Trojan:NPM/DependencyHijacker!AMTB severe
Trojan:NPM/Stealer!AMTB severe
Trojan:NPM/Typosquatting!AMTB severe
Trojan:O97M/DDownloader!rfn severe
Trojan:PDF/Phish!rfn severe
Trojan:PHP/Malgent!MSR severe
Trojan:PowerShell/QakBot!rfn severe
Trojan:PowerShell/ReverseShell.SA severe
Trojan:Python/Multiverze!rfn severe
Trojan:Script/Malgent!MSR severe
Trojan:Script/Multiverze!rfn severe
Trojan:VBS/Emotet!rfn severe
Trojan:VBS/Nemucod.SJ!MTB severe
Trojan:VBS/Obfus!rfn severe
Trojan:VBS/Obfuse!rfn severe
Trojan:VBS/Qakbot!rfn severe
Trojan:Win32/Alevaul!rfn severe
Trojan:Win32/AutoitShellInj!rfn severe
Trojan:Win32/Casdet!rfn severe
Trojan:Win32/Ceevee severe
Trojan:Win32/ClickFix.DEK!MTB severe
Trojan:Win32/ClipBanker!rfn severe
Trojan:Win32/Convagent!MTB severe
Trojan:Win32/CryptInject.BT!MTB severe
Trojan:Win32/DllInject!rfn severe
Trojan:Win32/Egairtigado!rfn severe
Trojan:Win32/EncryptTarget.A severe
Trojan:Win32/Etset!rfn severe
Trojan:Win32/Fragtor.AHB!MTB severe
Trojan:Win32/Gracing!rfn severe
Trojan:Win32/Injector!MTB severe
Trojan:Win32/Kazadm.A!MTB severe
Trojan:Win32/Kepavll!rfn severe
Trojan:Win32/Leonem!rfn severe
Trojan:Win32/LummaStealer.Z!sms severe
Trojan:Win32/Malgent severe
Trojan:Win32/Malgent!MSR severe
Trojan:Win32/Malgent!MTB severe
Trojan:Win32/MereTam!rfn severe
Trojan:Win32/PlugX!rfn severe
Trojan:Win32/PlugX.psyP!MTB severe
Trojan:Win32/Pomal!rfn severe
Trojan:Win32/Predator!rfn severe
Trojan:Win32/Pypykatz!MTB severe
Trojan:Win32/Qakbot!rfn severe
Trojan:Win32/QbotLNK!rfn severe
Trojan:Win32/Qwexlafiba!rfn severe
Trojan:Win32/Ravartar!rfn severe
Trojan:Win32/Rctopus severe
Trojan:Win32/Rozena!rfn severe
Trojan:Win32/Seheq!rfn severe
Trojan:Win32/Sehyioa.A!cl severe
Trojan:Win32/Skeeyah severe
Trojan:Win32/Skeeyah.A!MTB severe
Trojan:Win32/Suschil!rfn severe
Trojan:Win32/Tnega!MSR severe
Trojan:Win32/ValleyRat!rfn severe
Trojan:Win32/Vindor!rfn severe
Trojan:Win32/WinLNK!rfn severe
Trojan:Win32/Yomal!rfn severe
Trojan:Win32/Znyonm!rfn severe
Trojan:Win32/Zusy!rfn severe
Trojan:Win64/Barys!MTB severe
Trojan:Win64/BlackWidow!rfn severe
Trojan:Win64/Bumblebee!rfn severe
Trojan:Win64/Cerbu!rfn severe
Trojan:Win64/CobaltStrike!rfn severe
Trojan:Win64/CoinMiner!rfn severe
Trojan:Win64/Convagent.AHE!MTB severe
Trojan:Win64/DLLHijack!rfn severe
Trojan:Win64/Emotet!rfn severe
Trojan:Win64/Injector severe
Trojan:Win64/Lazy!MTB severe
Trojan:Win64/MalCertPutty!rfn severe
Trojan:Win64/Malgent!MSR severe
Trojan:Win64/Meterpreter!rfn severe
Trojan:Win64/Muldrop!MTB severe
Trojan:Win64/NetLoader!MTB severe
Trojan:Win64/Remus!MTB severe
Trojan:Win64/Reverseshell!MTB severe
Trojan:Win64/RomCom!rfn severe
Trojan:Win64/ShellCodeRunner.VG!MTB severe
Trojan:Win64/SilkParasite.GC!MTB severe
Trojan:Win64/SpyLoader!rfn severe
Trojan:Win64/SpyStealer!MTB severe
Trojan:Win64/Tedy!MTB severe
Trojan:Win64/Tedy.CAR!MTB severe
Trojan:Win64/ValleyRAT!MSR severe
Trojan:Win64/Yogi!MTB severe
Trojan:Win64/Zusy.AA!MTB severe
TrojanDownloader:JS/Qakbot!rfn severe
TrojanDownloader:O97M/Emotet!rfn severe
TrojanDownloader:Win32/ShortSeek!rfn severe
TrojanDropper:AndroidOS/SAgent!rfn severe
TrojanDropper:AndroidOS/Wroba!rfn severe
TrojanDropper:BAT/Obfuse!rfn severe
TrojanDropper:Win32/Floxif!pz severe
TrojanDropper:Win32/Muldrop.V!MTB severe
TrojanSpy:Win32/Delf severe
VirTool:MSIL/AntiVm!rfn severe
VirTool:Win32/Autorun!rfn severe
VirTool:Win32/Sliver!rfn severe
VulnerableDriver:Win32/BiosToolCommonDriver severe
Worm:Win32/Gamarue!rfn severe