Skip to main content

Change logs for security intelligence update version 1.459.51.0

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

Released on

9/4/2026 8:20:29 PM

Added threat detections

Name Severity
Trojan:MSIL/FormBook.XB!MTB severe
Trojan:MSIL/Noon.AE!MTB severe
Trojan:NPM/Polinder!AMTB severe
Trojan:PowerShell/NetLoader.AE!MTB severe
Trojan:PowerShell/PsDropper.BD!MTB severe
Trojan:Script/SvgStealer.ADR!MTB severe
Trojan:Win32/ValleyRat.BC!MTB severe
Trojan:Win32/WinLNK.LM!MTB severe
Trojan:Win64/SilkParasite.GC!MTB severe

Updated threat detections

Name Severity
Adware:MSIL/BrowserAssistant high
Adware:Python/Multiverze!rfn high
Adware:Win32/Tnega high
Backdoor:MSIL/Bladabindi!rfn severe
Backdoor:PHP/Chopper!rfn severe
Backdoor:PHP/Webshell!rfn severe
Backdoor:Win32/IRCbot!rfn severe
Backdoor:Win32/Koceg!rfn severe
Backdoor:Win32/ParalaxRat!rfn severe
Backdoor:Win32/Sdbot!rfn severe
Backdoor:Win64/Vankul!rfn severe
Exploit:O97M/CVE-2017-0199!rfn severe
HackTool:AndroidOS/Mesploit!rfn high
HackTool:MacOS/Keygen!rfn high
HackTool:NPM/Stealer!AMTB high
HackTool:Win32/AutoKMS high
HackTool:Win32/Crack!MTB high
HackTool:Win32/Keygen high
HackTool:Win32/Mimikatz.gen high
HackTool:Win32/NSudo.A high
HackTool:Win32/Patcher high
HackTool:Win64/Crack!MTB high
HackTool:Win64/Mikatz!rfn high
Misleading:Win32/Lodi high
PWS:MSIL/Stealer!rfn severe
PWS:Win32/Fareit!rfn severe
PWS:Win32/Fareit.VV!MTB severe
PWS:Win32/Sekur!rfn severe
Ransom:Win32/BlackCat!rfn severe
Ransom:Win32/BlackCat.MK!MTB severe
Ransom:Win32/Filecoder!rfn severe
Ransom:Win32/Genasom!rfn severe
Ransom:Win32/Lockbit!rfn severe
Ransom:Win32/Mortis!rfn severe
Ransom:Win32/PowerRanges!rfn severe
Ransom:Win64/Akira!rfn severe
Ransom:Win64/Gentlemen!rfn severe
Ransom:Win64/LockBit!rfn severe
Ransom:Win64/Magniber!rfn severe
Ransom:Win64/PANDORA.REL!MTB severe
Spyware:Python/Multiverze!rfn high
Spyware:Script/Multiverze!rfn high
Trojan:AndroidOS/Autopay!rfn severe
Trojan:AndroidOS/AVerseFalc!rfn severe
Trojan:AndroidOS/BTMOBRat!rfn severe
Trojan:AndroidOS/LockScreen!rfn severe
Trojan:AndroidOS/Spynote!rfn severe
Trojan:BAT/LNK_DarkGate!rfn severe
Trojan:BAT/Qakbot!rfn severe
Trojan:HTML/Qakbot!rfn severe
Trojan:Java/Multiverze!rfn severe
Trojan:JS/Qakbot!rfn severe
Trojan:JS/Redirector!rfn severe
Trojan:Linux/Mirai!rfn severe
Trojan:Linux/Multiverze!rfn severe
Trojan:MacOS/SuspSupplyRAT.A severe
Trojan:MSIL/Bobik.A!MTB severe
Trojan:MSIL/Cerbu!MTB severe
Trojan:MSIL/DllInject!rfn severe
Trojan:MSIL/LausivLoader.GVA!MTB severe
Trojan:MSIL/Quasar!rfn severe
Trojan:MSIL/r77RootKit!rfn severe
Trojan:MSIL/Stealer!MTB severe
Trojan:MSIL/XWorm!rfn severe
Trojan:MSIL/Zusy!MTB severe
Trojan:NPM/BeaverTail!AMTB severe
Trojan:NPM/Stealer!AMTB severe
Trojan:NPM/Typosquatting!AMTB severe
Trojan:O97M/DDownloader!rfn severe
Trojan:PDF/Phish!rfn severe
Trojan:PowerShell/AveMariaRAT.CA!MTB severe
Trojan:PowerShell/GuLoader.PA!MTB severe
Trojan:PowerShell/Nophid!rfn severe
Trojan:PowerShell/Obfuse!rfn severe
Trojan:PowerShell/Powdow!MTB severe
Trojan:Python/Multiverze!rfn severe
Trojan:Script/Multiverze!rfn severe
Trojan:Script/Obfuse!MSR severe
Trojan:VBS/Emoter!rfn severe
Trojan:VBS/Emotet!rfn severe
Trojan:VBS/Obfuse!rfn severe
Trojan:VBS/Pterodo!rfn severe
Trojan:VBS/Qakbot!rfn severe
Trojan:VBS/ShortPipe!rfn severe
Trojan:Win32/Barys!MTB severe
Trojan:Win32/BatLoader!rfn severe
Trojan:Win32/BlackMoon!MTB severe
Trojan:Win32/Casdet!rfn severe
Trojan:Win32/Cerber!rfn severe
Trojan:Win32/CryptInject!rfn severe
Trojan:Win32/DllInject!rfn severe
Trojan:Win32/DorkBot!rfn severe
Trojan:Win32/Dridex!rfn severe
Trojan:Win32/Dynamer!ac severe
Trojan:Win32/Egairtigado!rfn severe
Trojan:Win32/Enigmaprotector severe
Trojan:Win32/Etset!rfn severe
Trojan:Win32/Fauppod!rfn severe
Trojan:Win32/Flystudio!MTB severe
Trojan:Win32/Fragtor!MTB severe
Trojan:Win32/fragtor!rfn severe
Trojan:Win32/Fragtor.AHB!MTB severe
Trojan:Win32/HostInjector!rfn severe
Trojan:Win32/IcedIDLNK!rfn severe
Trojan:Win32/ICLoader!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/Malgent!MTB severe
Trojan:Win32/Malgent!rfn severe
Trojan:Win32/MalLoader!rfn severe
Trojan:Win32/MereTam!rfn severe
Trojan:Win32/Mint!rfn severe
Trojan:Win32/Neoreblamy!MTB severe
Trojan:Win32/Neoreblamy.NRD!MTB severe
Trojan:Win32/Neoreklami!MTB severe
Trojan:Win32/OffLoader!MTB severe
Trojan:Win32/OffLoader!rfn severe
Trojan:Win32/PhishLeonem!rfn severe
Trojan:Win32/PlugX!rfn severe
Trojan:Win32/Pomal!rfn severe
Trojan:Win32/Qakbot!rfn severe
Trojan:Win32/Qbot!rfn severe
Trojan:Win32/QbotLNK!rfn severe
Trojan:Win32/Qwexlafiba!rfn severe
Trojan:Win32/Ravartar!rfn severe
Trojan:Win32/Rozena!rfn severe
Trojan:Win32/Seheq!rfn severe
Trojan:Win32/Skeeyah.B!rfn severe
Trojan:Win32/Suschil!rfn severe
Trojan:Win32/SystemBC!rfn severe
Trojan:Win32/Tiggre!rfn severe
Trojan:Win32/TurtleLoader!rfn severe
Trojan:Win32/WinLNK!rfn severe
Trojan:Win32/WinLNK.ABM!MTB severe
Trojan:Win32/Yomal!rfn severe
Trojan:Win32/Znyonm!rfn severe
Trojan:Win64/Agentb!MTB severe
Trojan:Win64/Aotera!rfn severe
Trojan:Win64/Bumblebee!rfn severe
Trojan:Win64/Cerbu!rfn severe
Trojan:Win64/CerbuCrypt!rfn severe
Trojan:Win64/CoinMiner!rfn severe
Trojan:Win64/Coroxy!rfn severe
Trojan:Win64/CryptInject!rfn severe
Trojan:Win64/DisguisedXMRigMiner!MTB severe
Trojan:Win64/DLLHijack!rfn severe
Trojan:Win64/Downloader!MSR severe
Trojan:Win64/Emotet!rfn severe
Trojan:Win64/EmotetPacker!rfn severe
Trojan:Win64/IcedID!rfn severe
Trojan:Win64/Lazy!MTB severe
Trojan:Win64/Malgent!MSR severe
Trojan:Win64/Malgent!MTB severe
Trojan:Win64/Midie!MTB severe
Trojan:Win64/NightHawk!rfn severe
Trojan:Win64/Remus!MTB severe
Trojan:Win64/RemusStealer!MTB severe
Trojan:Win64/RustyStealer!MTB severe
Trojan:Win64/ShellCodeExec!MTB severe
Trojan:Win64/SpyLoader!rfn severe
Trojan:Win64/Tedy!MTB severe
Trojan:Win64/Tedy!rfn severe
Trojan:Win64/Tedy.A!MTB severe
Trojan:Win64/Vidar!MTB severe
Trojan:Win64/Zusy!MTB severe
Trojan:Win64/Zusy!rfn severe
TrojanClicker:Win32/Multiverze!rfn severe
TrojanDownloader:JS/Qakbot!rfn severe
TrojanDownloader:JS/Qbot!rfn severe
TrojanDownloader:O97M/Emotet!rfn severe
TrojanDownloader:O97M/IcedID!rfn severe
TrojanDownloader:O97M/Instabus.YA!MTB severe
TrojanDownloader:PowerShell/Obfuse!rfn severe
TrojanDownloader:PowerShell/PEDropper!rfn severe
TrojanDownloader:VBS/Emotet!rfn severe
TrojanDownloader:Win32/Begseabug!rfn severe
TrojanDownloader:Win32/Fmasidwn!rfn severe
TrojanDropper:AndroidOS/Multiverze!rfn severe
TrojanDropper:AndroidOS/Shedun!rfn severe
TrojanSpy:AndroidOS/Spynote!rfn severe
VirTool:Win32/Carpace!rfn severe
VirTool:Win32/CeeInject!rfn severe
VirTool:Win32/Obfuscator.XZ severe
Worm:Win32/AutoRun!rfn severe
Worm:Win32/Brontok!rfn severe
Worm:Win32/Citeary!rfn severe
Worm:Win32/Gamarue!rfn severe