Change logs for security intelligence update version 1.445.343.0

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

3/3/2026 11:45:05 PM

Added threat detections

Name	Severity
Behavior:Linux/Snowlight.FZ3	severe
Trojan:PowerShell/Boxter.HHY!MTB	severe
Trojan:Win32/WinLNK.SREQ!MTB	severe
Trojan:Win32/WinLNK.STL!MTB	severe
Trojan:Win64/Dapato.SX!MTB	severe
Trojan:Win64/Lazy.SXO!MTB	severe
Trojan:Win64/Tedy.SXI!MTB	severe

Updated threat detections

Name	Severity
Adware:Linux/Multiverze!rfn	high
Backdoor:PHP/Webshell.PA	severe
Backdoor:PHP/Webshell.S	severe
Backdoor:Win32/Coroxy!rfn	severe
Backdoor:Win64/Supper!rfn	severe
Exploit:JS/OVCExploit.gen	severe
Exploit:Win32/Tudimons.A!dha	severe
HackTool:PowerShell/BloodHound	high
Program:Linux/Multiverze!rfn	high
Ransom:Win32/Inc!rfn	severe
Ransom:Win32/Qilinloader!rfn	severe
Ransom:Win32/SafePay.MKV!MTB	severe
Ransom:Win64/Babuk!rfn	severe
Trojan:AndroidOS/AVerseFalc!rfn	severe
Trojan:HTML/ScrInject.PLJLH!MTB	severe
Trojan:HTML/ScrInject.SMW!MTB	severe
Trojan:JS/Obfuse.SLAG!MTB	severe
Trojan:JS/Obfuse.SLAH!MTB	severe
Trojan:JS/Pterodo!rfn	severe
Trojan:JS/Redirector.AHC!MTB	severe
Trojan:Linux/Multiverze!rfn	severe
Trojan:MacOS/Multiverze!rfn	severe
Trojan:MSIL/Malgent!MSR	severe
Trojan:PDF/Bumblebee!rfn	severe
Trojan:PDF/Phish!rfn	severe
Trojan:PowerShell/Agent.AKD	severe
Trojan:PowerShell/Powersploit.A	severe
Trojan:PowerShell/Powersploit.T	severe
Trojan:PowerShell/StealC!rfn	severe
Trojan:Script/Multiverze!rfn	severe
Trojan:VBS/Agent!AMTB	severe
Trojan:VBS/Drknit	severe
Trojan:VBS/Pterodo!rfn	severe
Trojan:VBS/Qakbot!rfn	severe
Trojan:Win32/Acll!rfn	severe
Trojan:Win32/Azorult!rfn	severe
Trojan:Win32/Bluteal!rfn	severe
Trojan:Win32/Casdet!rfn	severe
Trojan:Win32/Egairtigado!rfn	severe
Trojan:Win32/Etset!rfn	severe
Trojan:Win32/Flystudio!MTB	severe
Trojan:Win32/Kepavll!rfn	severe
Trojan:Win32/Leonem!rfn	severe
Trojan:Win32/Malgent	severe
Trojan:Win32/Malgent!MSR	severe
Trojan:Win32/MalLoader!rfn	severe
Trojan:Win32/MereTam!rfn	severe
Trojan:Win32/Meterpreter!rfn	severe
Trojan:Win32/Seheq!rfn	severe
Trojan:Win32/Skeeyah.A!MTB	severe
Trojan:Win32/Supma.A	severe
Trojan:Win32/Suschil!rfn	severe
Trojan:Win32/SystemBC!rfn	severe
Trojan:Win32/Tedy!rfn	severe
Trojan:Win32/Vindor!rfn	severe
Trojan:Win32/Wingo!rfn	severe
Trojan:Win32/Yomal!rfn	severe
Trojan:Win32/Znyonm!rfn	severe
Trojan:Win32/Zusy.BL!MTB	severe
Trojan:Win64/CryptInject!rfn	severe
Trojan:Win64/Lazy!rfn	severe
Trojan:Win64/Midie!MTB	severe
Trojan:Win64/Mikey.GXV!MTB	severe
Trojan:Win64/NightHawk!rfn	severe
Trojan:Win64/Tedy!MTB	severe
TrojanDownloader:BAT/QakBotLoader!rfn	severe
TrojanDownloader:JS/Qakbot!rfn	severe
TrojanDownloader:JS/Swabfex.P	severe
Virus:Win32/Expiro.HAB!MTB	severe
Worm:IRC/Generic	severe
Worm:VBS/Jenxcus	severe
Worm:Win32/Citeary!rfn	severe