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Change logs for security intelligence update version 1.455.496.0

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

8/4/2026 1:40:51 AM

Added threat detections

Name Severity
Phish:HTML/Redirector.PHV!MTB severe
Trojan:Linux/ShortLeash.DA!MTB severe
Trojan:Win64/RevStealer.DA!MTB severe
Trojan:Win64/Tedy.MKY!MTB severe

Updated threat detections

Name Severity
Adware:Win32/Tnega high
Backdoor:PHP/Remoteshell.V severe
Backdoor:Python/Meterpreter.C severe
Behavior:Win32/HijackLoader.AYA!MTB severe
Behavior:Win32/HijackLoader.NDC!MTB severe
Behavior:Win32/PuaPcSets!mapsi severe
Behavior:Win32/TaskengExeChp!mapsi severe
Exploit:Win32/Tudimons.A!dha severe
HackTool:Python/Impacket!AMTB high
HackTool:Win32/crack high
HackTool:Win32/Crack!MTB high
HackTool:Win32/Keygen high
HackTool:Win32/MeshAgent!MTB high
HackTool:Win64/Malgent!MSR high
HackTool:Win64/Meterpreter high
HackTool:Win64/Patcher!MSR high
PWS:Win32/Zbot!rfn severe
Ransom:Win32/BlackCat!rfn severe
Ransom:Win64/Akira!rfn severe
Ransom:Win64/BastaLoader!rfn severe
Trojan:BAT/LNK_DarkGate!rfn severe
Trojan:BAT/Qakbot!rfn severe
Trojan:HTML/Obfuse!rfn severe
Trojan:HTML/Phish!MSR severe
Trojan:HTML/Qakbot!rfn severe
Trojan:JS/AgentTesla.GT!MTB severe
Trojan:JS/QakbotLNK!rfn severe
Trojan:Linux/Multiverze!rfn severe
Trojan:MSIL/AgentTesla!rfn severe
Trojan:MSIL/Tedy!MTB severe
Trojan:MSIL/Zilla!MTB severe
Trojan:O97M/DDownloader!rfn severe
Trojan:PowerShell/Malagent!MSR severe
Trojan:PowerShell/Pterodo!rfn severe
Trojan:PowerShell/QakBot!rfn severe
Trojan:Script/Malgent!MSR severe
Trojan:VBS/Emotet!rfn severe
Trojan:VBS/Obfuse!rfn severe
Trojan:VBS/Pterodo!rfn severe
Trojan:VBS/Qakbot!rfn severe
Trojan:Win32/Acll!rfn severe
Trojan:Win32/AresLdrCrypt!rfn severe
Trojan:Win32/AutoitShellInj!rfn severe
Trojan:Win32/Ceprolad.A severe
Trojan:Win32/CryptInject!rfn severe
Trojan:Win32/Dynamer!rfn severe
Trojan:Win32/Egairtigado!rfn severe
Trojan:Win32/FakeFire!MTB severe
Trojan:Win32/Fauppod!rfn severe
Trojan:Win32/Kepavll!rfn severe
Trojan:Win32/Kryptik!MSR severe
Trojan:Win32/Latrodectus!rfn severe
Trojan:Win32/Leonem!rfn severe
Trojan:Win32/Malgent severe
Trojan:Win32/Malgent!MSR severe
Trojan:Win32/Malgent!MTB severe
Trojan:Win32/Meterpreter.A severe
Trojan:Win32/Penguish!rfn severe
Trojan:Win32/PikaBot!rfn severe
Trojan:Win32/Pomal!rfn severe
Trojan:Win32/Qakbot!rfn severe
Trojan:Win32/QuasarRat!MTB severe
Trojan:Win32/Qwexlafiba!rfn severe
Trojan:Win32/Ravartar!rfn severe
Trojan:Win32/Rctopus severe
Trojan:Win32/Seheq!rfn severe
Trojan:Win32/Skeeyah.A!MTB severe
Trojan:Win32/Suschil!rfn severe
Trojan:Win32/VMProtect!MTB severe
Trojan:Win32/Wacatac severe
Trojan:Win32/Wimepud!rfn severe
Trojan:Win32/WinLNK!rfn severe
Trojan:Win32/Yomal!rfn severe
Trojan:Win32/Zenpack!rfn severe
Trojan:Win64/CryptInject!rfn severe
Trojan:Win64/DLLHijack!rfn severe
Trojan:Win64/Emotet!rfn severe
Trojan:Win64/Emotetcrypt!rfn severe
Trojan:Win64/Hacktool.Phant0m!MSR severe
Trojan:Win64/Injector.EO severe
Trojan:Win64/Lazy!MTB severe
Trojan:Win64/Malgent!MSR severe
Trojan:Win64/Malgent!MTB severe
Trojan:Win64/RomulusLoader.DA!MTB severe
Trojan:Win64/Shaolaod!rfn severe
Trojan:Win64/ShellLoader!MTB severe
Trojan:Win64/Tedy.MK!MTB severe
Trojan:Win64/Tnega!MTB severe
Trojan:Win64/ValleyRat.ISL!MTB severe
Trojan:Win64/Vidar!MTB severe
TrojanDownloader:BAT/QakBotLoader!rfn severe
TrojanDownloader:JS/Qakbot!rfn severe
TrojanDownloader:O97M/Emotet!rfn severe
TrojanDownloader:SWF/Esaprof!rfn severe
TrojanDownloader:VBS/AsyncRAT.ZEC!MTB severe
TrojanDropper:PowerShell/Injector!MSR severe
VirTool:Win32/Tabloid!MTB severe
Worm:Win32/Dorkbot!rfn severe