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Change logs for security intelligence update version 1.445.413.0

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

3/8/2026 3:22:14 AM

Added threat detections

Name Severity
Behavior:Win32/AMSI.Gracing.MK severe
Behavior:Win32/SusPowerShellExecution.AM severe
Behavior:Win32/SusPowerShellExecution.AM!Ofn severe

Updated threat detections

Name Severity
Adware:Win32/Agent high
Backdoor:MSIL/XWormRAT!rfn severe
Backdoor:Win64/Supper!rfn severe
Behavior:Win32/MistBorn.A!nri severe
FriendlyFiles low
HackTool:Win32/Keygen high
Ransom:Win32/Critroni severe
Trojan:AndroidOS/AVerseFalc!rfn severe
Trojan:HTML/Pterodo!rfn severe
Trojan:JS/GlassWorm.I!MTB severe
Trojan:MSIL/AgentTesla!rfn severe
Trojan:MSIL/AsyncRat!rfn severe
Trojan:Python/Multiverze!rfn severe
Trojan:Win32/Alevaul!rfn severe
Trojan:Win32/Egairtigado!rfn severe
Trojan:Win32/Etset!rfn severe
Trojan:Win32/Hombot!MSR severe
Trojan:Win32/Hombot.A severe
Trojan:Win32/Kepavll!rfn severe
Trojan:Win32/Leonem!rfn severe
Trojan:Win32/Malgent severe
Trojan:Win32/Malgent!MSR severe
Trojan:Win32/MereTam!rfn severe
Trojan:Win32/PhishLeonem!rfn severe
Trojan:Win32/PonyStealer!rfn severe
Trojan:Win32/Provis!rfn severe
Trojan:Win32/Rugmi severe
Trojan:Win32/Seheq!rfn severe
Trojan:Win32/Skeeyah severe
Trojan:Win32/Supma.A severe
Trojan:Win32/Suschil!rfn severe
Trojan:Win64/BumbleBee!rfn severe
Trojan:Win64/CobaltStrike!rfn severe
Trojan:Win64/CryptInject!rfn severe
Trojan:Win64/Donut!rfn severe
Trojan:Win64/Latrodectus!rfn severe
TrojanDownloader:JS/Qakbot!rfn severe
VirTool:Win32/VBInject!rfn severe