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Change logs for security intelligence update version 1.457.236.0

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

8/19/2026 1:22:29 AM

Added threat detections

Name Severity
Trojan:MSIL/Upatre!rfn severe
Trojan:Win32/GuLoader.SXA!MTB severe
Trojan:Win64/SparkRAT!MTB severe

Updated threat detections

Name Severity
Adware:MacOS/Multiverze!rfn high
Backdoor:Win32/DarkGate!rfn severe
Backdoor:Win32/Koceg!rfn severe
Exploit:O97M/CVE-2017-0199.E severe
Exploit:Win64/CVE-2022-3699.B!MSR severe
HackTool:AndroidOS/Mesploit!rfn high
HackTool:Python/PWDump!MSR high
HackTool:Win32/Activator!MTB high
HackTool:Win32/Agent high
HackTool:Win64/Meterpreter high
Ransom:Win32/Basta!rfn severe
Ransom:Win32/BlackCat!rfn severe
Ransom:Win64/Akira!rfn severe
Ransom:Win64/Basta!rfn severe
Ransom:Win64/GunraCrypt!rfn severe
Spyware:Script/Multiverze!rfn high
SupportScam:Win32/Screcwon!MTB severe
Trojan:AndroidOS/AVerseFalc!rfn severe
Trojan:BAT/LNK_DarkGate!rfn severe
Trojan:BAT/Malgent!MSR severe
Trojan:BAT/Qakbot!rfn severe
Trojan:HTML/Phish!MSR severe
Trojan:HTML/Qakbot!rfn severe
Trojan:JS/QakbotLNK!rfn severe
Trojan:JS/Ursnif!rfn severe
Trojan:Linux/Multiverze!rfn severe
Trojan:MSIL/Cerbu!MTB severe
Trojan:MSIL/Seraph!rfn severe
Trojan:PowerShell/Malgent!MSR severe
Trojan:PowerShell/Pterodo!rfn severe
Trojan:Python/Multiverze!rfn severe
Trojan:Script/Malgent!MSR severe
Trojan:Script/Multiverze!rfn severe
Trojan:VBS/Emotet!rfn severe
Trojan:VBS/Obfuse!rfn severe
Trojan:Win32/AprilAxe!rfn severe
Trojan:Win32/AutoitInject.C!MTB severe
Trojan:Win32/AutoitShellInj!rfn severe
Trojan:Win32/AutoitShellInj.EA!MTB severe
Trojan:Win32/CryptInject!rfn severe
Trojan:Win32/DllInject!rfn severe
Trojan:Win32/Egairtigado!rfn severe
Trojan:Win32/Filecoder!rfn severe
Trojan:Win32/Kepavll!rfn severe
Trojan:Win32/Leonem!rfn severe
Trojan:Win32/Malgent severe
Trojan:Win32/Malgent!MSR severe
Trojan:Win32/Penguish!rfn severe
Trojan:Win32/Pikabot!rfn severe
Trojan:Win32/Predator!rfn severe
Trojan:Win32/Qwexlafiba!rfn severe
Trojan:Win32/Ravartar!rfn severe
Trojan:Win32/Remcos!rfn severe
Trojan:Win32/Seheq!rfn severe
Trojan:Win32/Suschil!rfn severe
Trojan:Win32/Tiggre!rfn severe
Trojan:Win32/WinLNK!rfn severe
Trojan:Win32/Yomal!rfn severe
Trojan:Win32/Znyonm!rfn severe
Trojan:Win64/Amadey!MTB severe
Trojan:Win64/CobaltStrike!rfn severe
Trojan:Win64/Donut!rfn severe
Trojan:Win64/Emotetcrypt!rfn severe
Trojan:Win64/Injector severe
Trojan:Win64/Malgent!MSR severe
Trojan:Win64/Tedy!MTB severe
TrojanDownloader:BAT/QakBotLoader!rfn severe
TrojanDownloader:JS/Qakbot!rfn severe
TrojanDownloader:O97M/Emotet!rfn severe
TrojanDownloader:VBS/AsyncRAT.ZEC!MTB severe
TrojanDownloader:Win32/Tnega severe
TrojanSpy:Win32/Banker!AMTB severe
VirTool:MSIL/Aikaantivm!rfn severe
VirTool:Win32/Tabloid!MTB severe