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Change logs for security intelligence update version 1.421.1900.0

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

2/14/2025 8:31:39 PM

Added threat detections

Name Severity
HackTool:Win32/Multiverze!rfn high
HackTool:Win64/GildedScarab.A high
HackTool:Win64/GildedScarab.C high
Phish:HTML/FakeDoc.AD!MTB severe
Phish:HTML/FakeLogin.SBZ!MTB severe
Phish:PDF/FakeDownload.PJ!MTB severe
Trojan:JS/Cryxos.OFT!MTB severe
Trojan:JS/FormBook.LAV!MTB severe
Trojan:MSIL/InjectorNetT.AJLA!MTB severe
Trojan:MSIL/InjectorNetT.AJLA!MTB severe
Trojan:PDF/FakeDocument.PE!MTB severe
Trojan:PowerShell/Obfuse.DRV!MTB severe
Trojan:PowerShell/Obfuse.DRW!MTB severe
Trojan:VBS/GuLoader.VBN!MTB severe
Trojan:Win32/AutoitInject.AMLA!MTB severe
Trojan:Win32/Convagent.ALLA!MTB severe
Trojan:Win32/DarkCloud.AKLA!MTB severe
Trojan:Win32/DarkCloud.AKLA!MTB severe
Trojan:Win32/GuLoader.QSL!MTB severe
Trojan:Win64/CryptInject.TKZ!MTB severe
Trojan:Win64/PoolInject.GA!MTB severe
Trojan:Win64/Rhadamanthys.GA!MTB severe
TrojanDownloader:PowerShell/Powdow.ORQ!MTB severe

Updated threat detections

Name Severity
Adware:Win32/Agent high
Adware:Win32/HostsChanger high
Adware:Win32/Malcole high
Adware:Win32/Multiverze!rfn high
Backdoor:Linux/Gafgyt.CI!MTB severe
Backdoor:MSIL/Bladabindi!rfn severe
Backdoor:MSIL/DCRat severe
Backdoor:Win32/Berbew!pz severe
Backdoor:Win32/Berbew!rfn severe
Backdoor:Win32/Berbew.AA!MTB severe
Backdoor:Win32/Bifrose severe
Backdoor:Win32/Hupigon.gen!B severe
Backdoor:Win32/Padodor!rfn severe
Backdoor:Win32/Padodor.SK!MTB severe
Backdoor:Win32/Poison severe
Backdoor:Win32/Simda.AT severe
Backdoor:Win32/Ursap!rts severe
Behavior:Win32/Mamadut.DM severe
BrowserModifier:Win32/IEFeats high
BrowserModifier:Win32/Prifou high
HackTool:Win32/Agent high
HackTool:Win32/crack high
HackTool:Win32/Crack!MSR high
HackTool:Win32/Crack!MTB high
HackTool:Win32/GameHack!MTB high
HackTool:Win32/Injector!MTB high
HackTool:Win32/Patcher high
HackTool:Win64/GildedScarab.B high
Phish:HTML/FakeDoc.AD!MTB severe
Phish:HTML/FakeLogin.SBI!MTB severe
Phish:PDF/FakeDownload.PJ!MTB severe
PWS:Win32/Axespec severe
PWS:Win32/Gamania.gen!D severe
PWS:Win32/Prast!rts severe
Spyware:Win32/Multiverze!rfn high
Trojan:AndroidOS/AVerseFalc!rfn severe
Trojan:AndroidOS/Mamont!rfn severe
Trojan:HTML/Phish severe
Trojan:Java/Adwind severe
Trojan:Java/Classloader.X severe
Trojan:JS/FormBook.LAV!MTB severe
Trojan:MSIL/AgentTesla.E!MTB severe
Trojan:MSIL/FileCrypt!rfn severe
Trojan:MSIL/Injuke.SHLZ!MTB severe
Trojan:MSIL/Lazy!MTB severe
Trojan:MSIL/LummaC.ASGH!MTB severe
Trojan:MSIL/LummaStealer!MTB severe
Trojan:PDF/Bumblebee.KKP!MTB severe
Trojan:PDF/Phish.RSA!MTB severe
Trojan:PowerShell/Obfuse.DRV!MTB severe
Trojan:PowerShell/Obfuse.DRW!MTB severe
Trojan:PowerShell/Obfuse.SAME!MTB severe
Trojan:VBS/GuLoader.VBN!MTB severe
Trojan:VBS/RemcosRAT.RSC!MTB severe
Trojan:Win32/Alevaul!rfn severe
Trojan:Win32/Convagent.ALLA!MTB severe
Trojan:Win32/Dcrat severe
Trojan:Win32/Etset!rfn severe
Trojan:Win32/Flystudio!MTB severe
Trojan:Win32/Formbook!rfn severe
Trojan:Win32/Fragtor!MTB severe
Trojan:Win32/Gamaredon.psyO!MTB severe
Trojan:Win32/GuLoader.QSK!MTB severe
Trojan:Win32/GuLoader.QSL!MTB severe
Trojan:Win32/Gupboot severe
Trojan:Win32/Ircbrute severe
Trojan:Win32/Kerproc!rts high
Trojan:Win32/Killav.DR severe
Trojan:Win32/Kryptik!rfn severe
Trojan:Win32/Leonem!rfn severe
Trojan:Win32/LummaC!rfn severe
Trojan:Win32/Malagent!gmb severe
Trojan:Win32/Malgent severe
Trojan:Win32/Malgent!MSR severe
Trojan:Win32/Malgent!MTB severe
Trojan:Win32/Midie!MTB severe
Trojan:Win32/Multiverze!rfn severe
Trojan:Win32/MyDoom!pz severe
Trojan:Win32/Neoreblamy!rfn severe
Trojan:Win32/Orsam!rfn severe
Trojan:Win32/Pomal!rfn severe
Trojan:Win32/PWSteal severe
Trojan:Win32/Rootkit!rfn severe
Trojan:Win32/Seheq!rfn severe
Trojan:Win32/Stealc!rfn severe
Trojan:Win32/Suschil!rfn severe
Trojan:Win32/Tedy!MTB severe
Trojan:Win32/Trafog!rts high
Trojan:Win32/UnusualASEP severe
Trojan:Win32/VBClone severe
Trojan:Win32/VBClone!rfn severe
Trojan:Win32/Yomal!rfn severe
Trojan:Win32/Znyonm!rfn severe
Trojan:Win32/Zusy severe
Trojan:Win32/Zusy!MTB severe
Trojan:Win64/Coinminer!rfn severe
Trojan:Win64/Lazy!MTB severe
Trojan:Win64/Malgent!MSR severe
Trojan:Win64/Malgent!MTB severe
TrojanDownloader:PowerShell/FakeCaptcha.PRQ!MTB severe
TrojanDownloader:PowerShell/Powdow.ORQ!MTB severe
TrojanDownloader:Win32/Swizzor severe
TrojanDownloader:Win32/Troxen!rts severe
TrojanDropper:Win32/Hupigon.gen!A severe
TrojanSpy:Win32/Agent severe
TrojanSpy:Win32/Hitpop.AE!dll severe
VirTool:Win32/DelfInject.gen!L severe
Worm:Win32/Ainslot.A severe
Worm:Win32/AutoRun.XXY!bit severe
Worm:Win32/Brontok!pz severe
Worm:Win32/ExploitBot severe