Change logs for security intelligence update version 1.455.446.0

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

7/31/2026 8:33:42 PM

Added threat detections

Name	Severity
Backdoor:MSIL/Bladabindi.SZ!MTB	severe
Ransom:Python/Blocker.SN!MTB	severe
Ransom:Win32/Babyk.SN!MTB	severe
Trojan:BAT/PhantomStealer.AHYB!MTB	severe
Trojan:BAT/Xworm.PGXB!MTB	severe
Trojan:JS/Obfuse.PBL!MTB	severe
Trojan:MSIL/Barys.SFE!MTB	severe
Trojan:MSIL/DiskWriter!MTB	severe
Trojan:MSIL/Heracles.YYS!MTB	severe
Trojan:MSIL/Jalapeno.SNA!MTB	severe
Trojan:MSIL/Krypt.SN!MTB	severe
Trojan:MSIL/SharpHound!MTB	severe
Trojan:MSIL/SideWinder!MTB	severe
Trojan:MSIL/SpyGate.SN!MTB	severe
Trojan:MSIL/Ursu.SN!MTB	severe
Trojan:MSIL/VenusStealer.AGC!MTB	severe
Trojan:MSIL/Zilla.SXH!MTB	severe
Trojan:PowerShell/DonutLoader.AIYB!MTB	severe
Trojan:PowerShell/Obfuse.KKA!MTB	severe
Trojan:Python/Disco.SN!MTB	severe
Trojan:Python/Discorder.SN!MTB	severe
Trojan:Python/LockScreen.AB!MTB	severe
Trojan:Python/PSWStealer.AD!MTB	severe
Trojan:VBS/Obfuse.PBC!MTB	severe
Trojan:Win32/ClickFix.AHG!MTB	severe
Trojan:Win32/DLLHijack.GXR!MTB	severe
Trojan:Win32/Minix.SQYW!MTB	severe
Trojan:Win32/ZShell.GVVA!MTB	severe
Trojan:Win64/AgentB.AHH!MTB	severe
Trojan:Win64/Greedy.AHB!MTB	severe
Trojan:Win64/KillWin.KK!MTB	severe
Trojan:Win64/ValleyRAT.SK!MTB	severe
TrojanDropper:Win64/Tedy.SN!MTB	severe
TrojanSpy:Win64/Noon.SK!MTB	severe
Worm:MSIL/Lazy.SN!MTB	severe

Updated threat detections

Name	Severity
Adware:Win32/AdLoad	high
Adware:Win32/OpenSUpdater	high
Backdoor:Linux/Multiverze!rfn	severe
Backdoor:PHP/WebShell!MSR	severe
Backdoor:PowerShell/CryptedLoader!rfn	severe
Backdoor:Win64/PipeMagic!rfn	severe
Behavior:MacOS/SuspKeyChainCopy.AB	severe
Behavior:Win32/Mamadut.DC	severe
Behavior:Win32/Mamadut.EF	severe
Behavior:Win32/PFApp_SuspVSExtension.A	severe
Behavior:Win64/Adeptesz.B!sms	severe
Behavior:Win64/HarrShellLd.B!sms	severe
Behavior:Win64/Havoc.G!sms	severe
Behavior:Win64/Scalodesz.B!sms	severe
Exploit:Win32/Tudimons.A!dha	severe
HackTool:Python/Impacket!MSR	high
HackTool:Win32/AutoKMS	high
HackTool:Win32/crack	high
HackTool:Win32/FrpClient!MSR	high
HackTool:Win32/Keygen	high
HackTool:Win32/Mimikatz.AA!MTB	high
HackTool:Win32/Netpass	high
HackTool:Win32/Patcher	high
PWS:Win32/Fareit!rfn	severe
Ransom:MSIL/Encoder.SN!MTB	severe
Ransom:MSIL/FileCoder.MX!MTB	severe
Ransom:MSIL/REntS.SN!MTB	severe
Ransom:Python/FileCrypter.SN!MTB	severe
Ransom:Win32/Basta!rfn	severe
Ransom:Win32/BlackCat!rfn	severe
Ransom:Win32/Embargo!rfn	severe
Ransom:Win32/Ragnarok.PC!MTB	severe
Ransom:Win32/Royal!rfn	severe
Ransom:Win32/WarLock!rfn	severe
Ransom:Win64/Akira!rfn	severe
Ransom:Win64/Funksec!rfn	severe
Ransom:Win64/KillAV!MTB	severe
SupportScam:Win32/Screwon!AMTB	severe
Trojan:BAT/Qakbot!rfn	severe
Trojan:HTA/Malgent!MSR	severe
Trojan:HTML/Phish!rfn	severe
Trojan:HTML/Qakbot!rfn	severe
Trojan:JS/Latrodectus!rfn	severe
Trojan:JS/NpmStealz	severe
Trojan:JS/Phish!MSR	severe
Trojan:JS/QakbotLNK!rfn	severe
Trojan:JS/QuietVault!MTB	severe
Trojan:Linux/CoinMiner!rfn	severe
Trojan:Linux/Multiverze!rfn	severe
Trojan:MSIL/Bladabindi!AMTB	severe
Trojan:MSIL/Bladabindi!MTB	severe
Trojan:MSIL/Cerbu!MTB	severe
Trojan:MSIL/Cymulate.ACY!MTB	severe
Trojan:MSIL/Cymulion.SN!MTB	severe
Trojan:MSIL/DarkCloud.RVF!MTB	severe
Trojan:MSIL/DllInject!MTB	severe
Trojan:MSIL/Formbook!MTB	severe
Trojan:MSIL/Heracles!MTB	severe
Trojan:MSIL/Keylogger!MTB	severe
Trojan:MSIL/Lazy.SXB!MTB	severe
Trojan:MSIL/Malgent!MTB	severe
Trojan:MSIL/QuasarRAT!MTB	severe
Trojan:MSIL/Xworm!MTB	severe
Trojan:MSIL/Zucy.SSN!MTB	severe
Trojan:MSIL/Zusy!rfn	severe
Trojan:O97M/DDownloader!rfn	severe
Trojan:PDF/Ursnif.RV!MTB	severe
Trojan:PowerShell/Nophid!rfn	severe
Trojan:PowerShell/Obfuse!MSR	severe
Trojan:PowerShell/PsExec.SL!ams	severe
Trojan:PowerShell/QakBot!rfn	severe
Trojan:Python/FileCoder.AD!MTB	severe
Trojan:Script/Malgent!MSR	severe
Trojan:Script/Multiverze!rfn	severe
Trojan:VBS/Emotet!rfn	severe
Trojan:VBS/Obfuse!rfn	severe
Trojan:VBS/Pterodo!rfn	severe
Trojan:Win32/Alevaul!rfn	severe
Trojan:Win32/AutoitNuqel!rfn	severe
Trojan:Win32/AutoitShellInj.EN!MTB	severe
Trojan:Win32/Barys!MTB	severe
Trojan:Win32/BaseFileEncrypt.B	severe
Trojan:Win32/BaseFileEncrypt.C	severe
Trojan:Win32/BatLoader!rfn	severe
Trojan:Win32/Bladabindi!MTB	severe
Trojan:Win32/Ceevee	severe
Trojan:Win32/ClickFix.YKV!MTB	severe
Trojan:Win32/CobaltStrike!rfn	severe
Trojan:Win32/Copak.PGCO!MTB	severe
Trojan:Win32/Danabot!rfn	severe
Trojan:Win32/DllHijack!MSR	severe
Trojan:Win32/DllInject!rfn	severe
Trojan:Win32/Egairtigado!rfn	severe
Trojan:Win32/Etset!rfn	severe
Trojan:Win32/Fauppod!rfn	severe
Trojan:Win32/Formbook!MTB	severe
Trojan:Win32/Grandoreiro!rfn	severe
Trojan:Win32/Grandoreiro.DYE!MTB	severe
Trojan:Win32/Hombot!MSR	severe
Trojan:Win32/Hombot.A	severe
Trojan:Win32/IcedIdLNK!rfn	severe
Trojan:Win32/Kepavll!rfn	severe
Trojan:Win32/Leonem!rfn	severe
Trojan:Win32/Malagent!rfn	severe
Trojan:Win32/Malgent	severe
Trojan:Win32/Malgent!MSR	severe
Trojan:Win32/MereTam!rfn	severe
Trojan:Win32/Nekark.SNA!MTB	severe
Trojan:Win32/PersistInStartupDir.A	severe
Trojan:Win32/PersistInStartupDir.B	severe
Trojan:Win32/PhishLeonem!rfn	severe
Trojan:Win32/Pomal!rfn	severe
Trojan:Win32/Predator!rfn	severe
Trojan:Win32/ProcessHijack.GTM!MTB	severe
Trojan:Win32/Qakbot!rfn	severe
Trojan:Win32/Qbot!rfn	severe
Trojan:Win32/Qilinloader!rfn	severe
Trojan:Win32/Qwexlafiba!rfn	severe
Trojan:Win32/Ravartar!rfn	severe
Trojan:Win32/Runner.HB!MTB	severe
Trojan:Win32/Seheq!rfn	severe
Trojan:Win32/ShortSeek!rfn	severe
Trojan:Win32/Skeeyah.B!rfn	severe
Trojan:Win32/SolarMark!rfn	severe
Trojan:Win32/Stealer!MTB	severe
Trojan:Win32/Suloc!rfn	severe
Trojan:Win32/Supma.A	severe
Trojan:Win32/Suschil!rfn	severe
Trojan:Win32/Tnega.BK!MTB	severe
Trojan:Win32/WinLNK!MSR	severe
Trojan:Win32/WinLNK!rfn	severe
Trojan:Win32/WinLNK.SMK!MTB	severe
Trojan:Win32/Yomal!rfn	severe
Trojan:Win32/Znyonm!rfn	severe
Trojan:Win64/AuKill!rfn	severe
Trojan:Win64/Barys!MTB	severe
Trojan:Win64/BlackWidow!rfn	severe
Trojan:Win64/BumbleBee!rfn	severe
Trojan:Win64/Cerbu!MTB	severe
Trojan:Win64/Cerbu.NC!MTB	severe
Trojan:Win64/CobaltStrike!rfn	severe
Trojan:Win64/CoinMiner!rfn	severe
Trojan:Win64/CymRun.RDA!MTB	severe
Trojan:Win64/DBadur!MTB	severe
Trojan:Win64/Donut!MTB	severe
Trojan:Win64/Emotet!rfn	severe
Trojan:Win64/Emotetcrypt!rfn	severe
Trojan:Win64/EmotetPacker!rfn	severe
Trojan:Win64/Gobin!MTB	severe
Trojan:Win64/IcedID!rfn	severe
Trojan:Win64/Lazy!MTB	severe
Trojan:Win64/Lazy.NUA!MTB	severe
Trojan:Win64/Lotok!MTB	severe
Trojan:Win64/Malgent!MSR	severe
Trojan:Win64/Malgent!MTB	severe
Trojan:Win64/Minix.GVA!MTB	severe
Trojan:Win64/NjRat!MTB	severe
Trojan:Win64/OverLordRAT!MTB	severe
Trojan:Win64/Oyster!rfn	severe
Trojan:Win64/RALord!rfn	severe
Trojan:Win64/ReflectiveLoader	severe
Trojan:Win64/Sheheq!rfn	severe
Trojan:Win64/Tedy!MTB	severe
Trojan:Win64/Tedy.MTH!MTB	severe
Trojan:Win64/Tedy.SL!MTB	severe
Trojan:Win64/XMRig.PA!MTB	severe
Trojan:Win64/Zusy!MTB	severe
Trojan:Win64/Zusy!rfn	severe
TrojanDownloader:BAT/QakBotLoader!rfn	severe
TrojanDownloader:JS/Nemucod	severe
TrojanDownloader:JS/Qakbot!rfn	severe
TrojanDownloader:O97M/Emotet!rfn	severe
TrojanDownloader:PDF/BumbleBee!rfn	severe
TrojanDownloader:PowerShell/PEDropper!rfn	severe
TrojanDownloader:Win32/ShortSeek!rfn	severe
TrojanDropper:BAT/Malgent!MSR	severe
TrojanDropper:Python/Malgent!MSR	severe
VirTool:Java/Meterpreter.A	severe
VirTool:MSIL/Subti!rfn	severe
VirTool:Win32/CeeInject!rfn	severe
VirTool:Win32/Obfuscator!rfn	severe
VirTool:Win64/Chisel!rfn	severe
Worm:Win32/Brontok!rfn	severe
Worm:Win32/Citeary!rfn	severe
Worm:Win32/Gamarue!rfn	severe
Worm:Win32/Sohanad!rfn	severe