Change logs for security intelligence update version 1.445.391.0

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

3/6/2026 11:11:46 PM

Added threat detections

Name	Severity
Trojan:JS/Redirector.ADW!MTB	severe
Trojan:JS/Redirector.MKA!MTB	severe
Trojan:MSIL/Marsilia.MK!MTB	severe
Trojan:Win64/AbuseCommBack.MS!sms	severe
Trojan:Win64/AbuseCommBack.MT	severe
Trojan:Win64/AbuseCommBack.MT!sms	severe
Trojan:Win64/AbuseCommMain.MS	severe
Trojan:Win64/AbuseCommMain.MS!sms	severe
Trojan:Win64/AbuseCommMain.MT	severe
Trojan:Win64/AbuseCommMain.MT!sms	severe
Trojan:Win64/ShellcodeRunner.QQD!MTB	severe
Trojan:Win64/ShellcodeRunner.TTP!MTB	severe
Trojan:Win64/SpyNoon.ZNH!MTB	severe

Updated threat detections

Name	Severity
Backdoor:MSIL/XWormRAT!rfn	severe
Behavior:MacOS/MacOSChangeFileRemediateFilesTest	severe
Behavior:MacOS/MacOSChangeFileTest	severe
Behavior:MacOS/MacOSCopyFileTest	severe
Behavior:MacOS/MacOSCreateFileRemediateFilesTest	severe
Behavior:MacOS/MacOSDeleteFileTest	severe
Behavior:MacOS/MacOSOpenFileTest	severe
Behavior:MacOS/MacOSProcessStartTest	severe
Behavior:MacOS/MacOSRenameFileTest	severe
Behavior:MacOS/MacOSSocketAcceptTest	severe
Behavior:MacOS/MacOSSocketConnectTest	severe
Behavior:Win32/ShellIconOverlayIdentifiers.B	severe
Behavior:Win64/AbuseCommBack.B!sms	severe
Behavior:Win64/AbuseCommMain.B!sms	severe
Exploit:O97M/CVE-2012-0158.E	severe
Exploit:Win32/Tudimons.A!dha	severe
HackTool:PHP/Webshell!AMTB	high
HackTool:Python/Impacket!MSR	high
HackTool:Win32/AutoKMS!rfn	high
HackTool:Win32/crack	high
Ransom:Win32/Embargo!rfn	severe
Ransom:Win32/LockBit!MTB	severe
Ransom:Win64/PrinceRansom!rfn	severe
Trojan:AndroidOS/AVerseFalc!rfn	severe
Trojan:BAT/LNK_DarkGate!rfn	severe
Trojan:BAT/Qakbot!rfn	severe
Trojan:HTML/FakeCaptcha!MTB	severe
Trojan:HTML/Qakbot!rfn	severe
Trojan:JS/Qakbot!rfn	severe
Trojan:JS/QakbotLNK!rfn	severe
Trojan:JS/Redirector!MTB	severe
Trojan:JS/Redirector.AHC!MTB	severe
Trojan:JS/Redirector.PAA!MTB	severe
Trojan:JS/Redirector.TSM!MTB	severe
Trojan:Linux/Multiverze!rfn	severe
Trojan:MSIL/ShellCodeRunner.GPSC!MTB	severe
Trojan:O97M/DDownloader!rfn	severe
Trojan:PowerShell/Exploit.CVE-2021-1675.A	severe
Trojan:PowerShell/Obfuscator.PGAH!MTB	severe
Trojan:PowerShell/Pterodo!rfn	severe
Trojan:PowerShell/QakBot!rfn	severe
Trojan:Python/Bobik.EB!MTB	severe
Trojan:Script/Multiverze!rfn	severe
Trojan:VBS/Emotet!rfn	severe
Trojan:VBS/Obfuse!rfn	severe
Trojan:VBS/Qakbot!rfn	severe
Trojan:Win32/Alevaul!rfn	severe
Trojan:Win32/AutoitInject.AHB!MTB	severe
Trojan:Win32/AutoitInject.ARDB!MTB	severe
Trojan:Win32/DCRat!MTB	severe
Trojan:Win32/DllInject!rfn	severe
Trojan:Win32/Dynamer!rfn	severe
Trojan:Win32/Egairtigado!rfn	severe
Trojan:Win32/Enigmaprotector	severe
Trojan:Win32/Etset!rfn	severe
Trojan:Win32/GhostSocks!rfn	severe
Trojan:Win32/Kepavll!rfn	severe
Trojan:Win32/Latrodectus!rfn	severe
Trojan:Win32/Leonem!rfn	severe
Trojan:Win32/Malgent	severe
Trojan:Win32/Malgent!MSR	severe
Trojan:Win32/Malgent!MTB	severe
Trojan:Win32/Masson.A!ac	severe
Trojan:Win32/MereTam!rfn	severe
Trojan:Win32/Pantera!rfn	severe
Trojan:Win32/Pomal!rfn	severe
Trojan:Win32/Qakbot!rfn	severe
Trojan:Win32/Seheq!rfn	severe
Trojan:Win32/SmokeLoader.KX!MTB	severe
Trojan:Win32/Suloc!rfn	severe
Trojan:Win32/Supma.A	severe
Trojan:Win32/Suschil!rfn	severe
Trojan:Win32/WinLNK!rfn	severe
Trojan:Win32/Yomal!rfn	severe
Trojan:Win32/Znyonm!rfn	severe
Trojan:Win64/AbuseCommBack.MS	severe
Trojan:Win64/CobaltStrike!rfn	severe
Trojan:Win64/CoinMiner!rfn	severe
Trojan:Win64/Dacic.AHB!MTB	severe
Trojan:Win64/Emotetcrypt!rfn	severe
Trojan:Win64/EvelynStealer.KX!MTB	severe
Trojan:Win64/Lazy!MTB	severe
Trojan:Win64/Malgent!MSR	severe
Trojan:Win64/Oyster!rfn	severe
Trojan:Win64/r77RootKit!rfn	severe
Trojan:Win64/ShellcodeRunner.MKF!MTB	severe
Trojan:Win64/Vidar.AQ!AMTB	severe
Trojan:Win64/Zusy!MTB	severe
TrojanDownloader:BAT/QakBotLoader!rfn	severe
TrojanDownloader:JS/Qakbot!rfn	severe
TrojanDownloader:Linux/SAgnt!MSR	severe
TrojanDownloader:O97M/Emotet!rfn	severe
TrojanDownloader:PowerShell/Obfuse!rfn	severe
TrojanDownloader:VBS/AsyncRAT.ZEC!MTB	severe
TrojanSpy:Win32/Skeeyah.A!rfn	severe
VirTool:Win32/Sliver!rfn	severe
Worm:Win32/Crastic!rfn	severe