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Change logs for security intelligence update version 1.445.186.0

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

2/22/2026 4:53:02 AM

Added threat detections

No new threat detections added in selected update

Updated threat detections

Name Severity
Adware:Linux/Multiverze!rfn high
Adware:Win32/Tnega high
Backdoor:Win32/Aicat.A!ml severe
Backdoor:Win32/IRCbot!rfn severe
Backdoor:Win64/Nukesped severe
Backdoor:Win64/RomComLoader!rfn severe
DoS:Win32/FiberLake!rfn severe
Exploit:JS/Mult.DJ severe
HackTool:PowerShell/Malgent!MSR high
HackTool:Win32/crack high
HackTool:Win32/Crack!MTB high
Ransom:Win32/Babuk!rfn severe
Ransom:Win32/DynoWiper!rfn severe
Ransom:Win64/BianLian!rfn severe
Ransom:Win64/PANDORA.REL!MTB severe
Trojan:AndroidOS/AVerseFalc!rfn severe
Trojan:BAT/LNK_DarkGate!rfn severe
Trojan:BAT/Qakbot!rfn severe
Trojan:HTML/Obfuse!rfn severe
Trojan:JS/QakbotLNK!rfn severe
Trojan:Linux/Multiverze!rfn severe
Trojan:MSIL/AgentTesla!rfn severe
Trojan:MSIL/AsyncRat!rfn severe
Trojan:MSIL/Crysen!rfn severe
Trojan:MSIL/Malgent!rfn severe
Trojan:MSIL/Perseus!rfn severe
Trojan:PDF/Phish!rfn severe
Trojan:PDF/Ursinf!rfn severe
Trojan:PowerShell/Pterodo!rfn severe
Trojan:PowerShell/QakBot!rfn severe
Trojan:Script/Multiverze!rfn severe
Trojan:VBS/Emotet!rfn severe
Trojan:VBS/Qakbot!rfn severe
Trojan:Win32/Acll!rfn severe
Trojan:Win32/Alevaul!rfn severe
Trojan:Win32/AutoitInject.DSK!MTB severe
Trojan:Win32/Bobik!rfn severe
Trojan:Win32/Convagent!rfn severe
Trojan:Win32/Coroxy!rfn severe
Trojan:Win32/DarkGate!rfn severe
Trojan:Win32/DllInject!rfn severe
Trojan:Win32/Egairtigado!rfn severe
Trojan:Win32/Etset!rfn 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/PhishLeonem!rfn severe
Trojan:Win32/Pikbot!rfn severe
Trojan:Win32/Pypykatz!MTB severe
Trojan:Win32/Qakbot!rfn severe
Trojan:Win32/Qbot!rfn severe
Trojan:Win32/Seheq!rfn severe
Trojan:Win32/Supma.A severe
Trojan:Win32/Suschil!rfn severe
Trojan:Win32/TitanStealer!rfn severe
Trojan:Win32/Tnega.BK!MTB severe
Trojan:Win32/Yomal!rfn severe
Trojan:Win32/Znyonm!rfn severe
Trojan:Win64/CryptInject!rfn severe
Trojan:Win64/Emotet!rfn severe
Trojan:Win64/Malgent!MSR severe
Trojan:Win64/ReflectiveLoader severe
Trojan:Win64/Vidar!rfn severe
TrojanDownloader:BAT/QakBotLoader!rfn severe
TrojanDownloader:JS/Qakbot!rfn severe
TrojanDownloader:O97M/Emotet!rfn severe
TrojanDownloader:PowerShell/Obfuse!rfn severe
TrojanDownloader:Win32/Rugmi!rfn severe
TrojanDropper:Win32/Malgent!MSR severe
VirTool:Java/Meterpreter.A severe
Worm:Win32/Mofksys!rfn severe