Change logs for security intelligence update version 1.445.199.0

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

2/22/2026 10:41:56 PM

Added threat detections

No new threat detections added in selected update

Updated threat detections

Name	Severity
Backdoor:Linux/Gafgyt!rfn	severe
Exploit:O97M/CVE-2017-11882.A	severe
Exploit:PHP/Small!AMTB	severe
HackTool:Python/Impacket!AMTB	high
HackTool:Python/Impacket.AV	high
HackTool:Win32/crack	high
HackTool:Win32/Crack!MTB	high
HackTool:Win32/Keygen	high
HackTool:Win32/Malgent	high
HackTool:Win32/Malgent!MSR	high
HackTool:Win32/Patcher	high
Program:Linux/Multiverze!rfn	high
Ransom:Win32/DragonForce!rfn	severe
Trojan:AndroidOS/AVerseFalc!rfn	severe
Trojan:BAT/Malscript!MTB	severe
Trojan:HTML/Redirector!MTB	severe
Trojan:JS/QakbotLNK!rfn	severe
Trojan:Linux/Multiverze!rfn	severe
Trojan:Script/Multiverze!rfn	severe
Trojan:VBS/Emotet!rfn	severe
Trojan:Win32/CryptInject	severe
Trojan:Win32/Egairtigado!rfn	severe
Trojan:Win32/Etset!rfn	severe
Trojan:Win32/Fareit.VB!MTB	severe
Trojan:Win32/Kepavll!rfn	severe
Trojan:Win32/KoiLoader!rfn	severe
Trojan:Win32/Leonem!rfn	severe
Trojan:Win32/Malgent	severe
Trojan:Win32/Malgent!MTB	severe
Trojan:Win32/Mimikatz!rfn	severe
Trojan:Win32/Pomal!rfn	severe
Trojan:Win32/Pypykatz!MTB	severe
Trojan:Win32/Seheq!rfn	severe
Trojan:Win32/SolarMark!rfn	severe
Trojan:Win32/Supma.A	severe
Trojan:Win32/Suschil!rfn	severe
Trojan:Win32/Tasker!MTB	severe
Trojan:Win32/Ursnif!rfn	severe
Trojan:Win32/Vindor!rfn	severe
Trojan:Win32/Yomal!rfn	severe
Trojan:Win64/BumbleBee!rfn	severe
Trojan:Win64/CobaltStrike!rfn	severe
Trojan:Win64/CoinMiner!rfn	severe
Trojan:Win64/CryptInject!rfn	severe
Trojan:Win64/EmotetPacker!rfn	severe
Trojan:Win64/Oyster!rfn	severe
Trojan:Win64/Qakbot!rfn	severe
Trojan:Win64/Revsocks!rfn	severe
Trojan:Win64/TurtleLoader!rfn	severe
TrojanDownloader:JS/Qakbot!rfn	severe
TrojanDownloader:O97M/Emotet!rfn	severe
TrojanDropper:Win32/Malgent!MSR	severe