Change logs for security intelligence update version 1.445.363.0

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

3/5/2026 7:02:32 AM

Added threat detections

Name	Severity
TrojanDownloader:Script/Iranbot.A	severe

Updated threat detections

Name	Severity
Adware:Win32/Tnega	high
HackTool:PowerShell/PowerView!rfn	high
Joke:Java/Multiverze	moderate
Program:AndroidOS/Multiverze	high
Ransom:Win32/Basta!rfn	severe
Ransom:Win32/BlackCat!rfn	severe
Ransom:Win32/DragonForce!rfn	severe
Ransom:Win32/Filecoder!rfn	severe
Ransom:Win64/LockBit!rfn	severe
Trojan:AndroidOS/AVerseFalc!rfn	severe
Trojan:AndroidOS/Multiverze	severe
Trojan:AndroidOS/Xhelper	severe
Trojan:BAT/KillAV.PGKA!MTB	severe
Trojan:BAT/Malgent!MSR	severe
Trojan:HTML/Qakbot!rfn	severe
Trojan:HTML/Qbot!rfn	severe
Trojan:HTML/ScrInject.SJKP!MTB	severe
Trojan:HTML/Stealer.ARR!MTB	severe
Trojan:JS/Remcos.AH!MTB	severe
Trojan:MSIL/Heracles.CD!MTB	severe
Trojan:PowerShell/Boxter.A!AMTB	severe
Trojan:PowerShell/Malgent!MSR	severe
Trojan:VBS/Emotet!rfn	severe
Trojan:VBS/Obfuse!rfn	severe
Trojan:Win32/Acll!rfn	severe
Trojan:Win32/Alevaul!rfn	severe
Trojan:Win32/DllInject!rfn	severe
Trojan:Win32/Egairtigado!rfn	severe
Trojan:Win32/ESUTest	severe
Trojan:Win32/Etset!rfn	severe
Trojan:Win32/Kepavll!rfn	severe
Trojan:Win32/Leonem	severe
Trojan:Win32/Leonem!rfn	severe
Trojan:Win32/Malgent	severe
Trojan:Win32/Malgent!MSR	severe
Trojan:Win32/PhishLeonem!rfn	severe
Trojan:Win32/Seheq!rfn	severe
Trojan:Win32/Spyware.ARR!MTB	severe
Trojan:Win32/Suschil!rfn	severe
Trojan:Win32/Yomal!rfn	severe
Trojan:Win32/Znyonm!rfn	severe
Trojan:Win64/Emotetcrypt!rfn	severe
Trojan:Win64/EmotetPacker!rfn	severe
Trojan:Win64/FSAutcik	severe
Trojan:Win64/Latrodectus!rfn	severe
Trojan:Win64/Skeeyah.MG!MTB	severe
TrojanDownloader:JS/Qakbot!rfn	severe
TrojanDownloader:JS/Small.I	severe
TrojanDropper:AndroidOS/Multiverze	severe