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Change logs for security intelligence update version 1.445.570.0

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

3/16/2026 1:15:37 PM

Added threat detections

Name Severity
Phish:HTML/FakeLogin.SJD!MSR severe
Trojan:MSIL/DarkTortilla.RVC!MTB severe
Trojan:PowerShell/Boxter.GNF!MTB severe
Trojan:Script/SvgStealer.DEM!MTB severe
Trojan:Win32/Mikey.RA!AMTB severe
Trojan:Win64/FormBook.ABFM!MTB severe
Trojan:Win64/MythStelaer!MTB severe
TrojanDownloader:PowerShell/DonutLoader.RV!MTB severe
VirTool:MSIL/Shartokenesz!rfn severe

Updated threat detections

Name Severity
Adware:Win32/BroExt high
Backdoor:JS/Chopper.M severe
Backdoor:Win32/Coroxy!rfn severe
Backdoor:Win32/DarkVNC!rfn severe
Behavior:Win32/CheapAngler.A!dha severe
Exploit:HTML/IframeRef.gen severe
Exploit:O97M/CVE-2025-53770.DA!ams severe
FriendlyFiles low
Ransom:MSIL/CryptoLocker!rfn severe
Ransom:Win32/LockBit!rfn severe
Ransom:Win64/Akira!rfn severe
Trojan:AndroidOS/AVerseFalc!rfn severe
Trojan:BAT/NetLoader!AMTB severe
Trojan:BAT/Qakbot!rfn severe
Trojan:HTML/FakeAlert!rfn severe
Trojan:HTML/Pterodo!rfn severe
Trojan:HTML/Qakbot!rfn severe
Trojan:HTML/Qbot!rfn severe
Trojan:HTML/Redirector.AA!AMTB severe
Trojan:JS/ChatGPTStealer.GVA!MTB severe
Trojan:JS/Qakbot!rfn severe
Trojan:JS/QakbotLNK!rfn severe
Trojan:Linux/Multiverze!rfn severe
Trojan:MSIL/AsyncRat!rfn severe
Trojan:MSIL/CoinMiner!rfn severe
Trojan:O97M/DDownloader!rfn severe
Trojan:PDF/Phish!rfn severe
Trojan:PDF/Ursnif!rfn severe
Trojan:PowerShell/RemcosRAT!AMTB severe
Trojan:Script/Multiverze!rfn severe
Trojan:Script/SvgStealer.AT!MTB severe
Trojan:Script/SvgStealer.AV!MTB severe
Trojan:VBS/Obfuse!rfn severe
Trojan:VBS/Pterodo!MTB severe
Trojan:VBS/Qakbot!rfn severe
Trojan:Win32/Acll!rfn severe
Trojan:Win32/Alevaul!rfn severe
Trojan:Win32/Azorult!rfn severe
Trojan:Win32/Casdet!rfn severe
Trojan:Win32/Cerber!rfn severe
Trojan:Win32/Coroxy!rfn severe
Trojan:Win32/DCRat!MTB severe
Trojan:Win32/Egairtigado!rfn severe
Trojan:Win32/Etset!rfn severe
Trojan:Win32/Fauppod!rfn severe
Trojan:Win32/Filecoder!rfn severe
Trojan:Win32/FormBook!rfn severe
Trojan:Win32/GCleaner!MTB severe
Trojan:Win32/Guloader.K!MTB severe
Trojan:Win32/Kepavll!rfn severe
Trojan:Win32/Kovter!rfn severe
Trojan:Win32/Leonem!rfn severe
Trojan:Win32/Malgent!MSR severe
Trojan:Win32/MereTam!rfn severe
Trojan:Win32/PhishLeonem!rfn severe
Trojan:Win32/Pomal!rfn severe
Trojan:Win32/Primarypass!rfn severe
Trojan:Win32/Qakbot!rfn severe
Trojan:Win32/Qbot!rfn severe
Trojan:Win32/Remcos!MTB severe
Trojan:Win32/Remcos!rfn severe
Trojan:Win32/Seheq!rfn severe
Trojan:Win32/ShortSeek!rfn severe
Trojan:Win32/Supma.A severe
Trojan:Win32/Suschil!rfn severe
Trojan:Win32/SystemBC!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/CobaltStrike!rfn severe
Trojan:Win64/CoinMiner!rfn severe
Trojan:Win64/CryptInject!rfn severe
Trojan:Win64/Delf!rfn severe
Trojan:Win64/EmotetPacker!rfn severe
Trojan:Win64/Injector!MTB severe
Trojan:Win64/Lazy!MTB severe
Trojan:Win64/PoolInject!MTB severe
Trojan:Win64/Rozena!MTB severe
Trojan:Win64/Tedy!MTB severe
Trojan:Win64/Tnega!MTB severe
Trojan:Win64/Vidar!MTB severe
TrojanDownloader:BAT/QakBotLoader!rfn severe
TrojanDownloader:JS/Qakbot!rfn severe
TrojanDownloader:O97M/Emotet!rfn severe
TrojanDropper:PowerShell/Doprimm!rfn severe
UwS:MSIL/Malgent!MSR high
Worm:Win32/Babonock.A severe
Worm:Win32/Nuqel!rfn severe
Worm:Win32/Sohanad!rfn severe