Change log for definition version 1.249.993.0 RSS feed icon

This page lists what has changed in the most recent definitions update for Windows Defender Antivirus and Microsoft Security Essentials.

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The following tables list the new and updated definitions for the version you select here. You can choose from the 20 latest updates, and the most recent update is shown by default:

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Definition available date: Aug 13,2017 10:36 AM UTC

New definitions

Updated definitions

BrowserModifier:Win32/Diplugemhigh
HackTool:MSIL/Boilod.Ahigh
SoftwareBundler:MSIL/Wizremhigh
SoftwareBundler:Win32/ICLoaderhigh
SoftwareBundler:Win32/Mizenotahigh
HackTool:Win32/BrowserPassviewmoderate
HackTool:Win32/Kapahyku.Amoderate
Backdoor:MSIL/Noancooe.Csevere
Backdoor:Win32/Gaertob.Asevere
Backdoor:Win32/NetWiredRC.Dsevere
Backdoor:Win32/Qakbot.Tsevere
Backdoor:Win32/Simbotsevere
Backdoor:Win32/Xtrat.ACsevere
Backdoor:Win32/Zegostsevere
DDoS:Win32/Nitol.Asevere
PWS:Win32/Fareitsevere
PWS:Win32/Zbot!CIsevere
PWS:Win32/Zbot!VMsevere
Ransom:MSIL/JigsawLocker.Asevere
Ransom:Win32/LockScreensevere
Ransom:Win32/Somhoveran.Csevere
Trojan:BAT/Qhost!gensevere
Trojan:JS/Sochrotorsevere
Trojan:MSIL/Starter.Fsevere
Trojan:MSIL/Vahodon.Bsevere
Trojan:Win32/Asacky.A!bitsevere
Trojan:Win32/Cortheaper.Asevere
Trojan:Win32/Dynamer!acsevere
Trojan:Win32/Ronohu.Asevere
Trojan:Win32/Salgorea.C!dhasevere
Trojan:Win32/Tonmyesevere
Trojan:Win32/Zonsterarch.BWsevere
TrojanDownloader:JS/Nemucod!rfnsevere
TrojanDownloader:MSIL/Genmaldow.Usevere
TrojanDownloader:Win32/Brantall.Bsevere
TrojanDownloader:Win32/Dofoil.ACsevere
TrojanDownloader:Win32/Javsisxep.Asevere
TrojanDownloader:Win32/Tugspay.Asevere
TrojanDownloader:Win32/Waledac.ALsevere
TrojanDropper:Win32/Randrew.A!bitsevere
TrojanSpy:MSIL/Golroted.Asevere
TrojanSpy:MSIL/Golroted.Esevere
TrojanSpy:MSIL/Omaneat.Bsevere
TrojanSpy:MSIL/Omaneat.Csevere
TrojanSpy:MSIL/Omaneat.F!bitsevere
TrojanSpy:MSIL/Plimrost.Bsevere
VirTool:MSIL/Subti.Nsevere
VirTool:Win32/CeeInjectsevere
VirTool:Win32/DelfInjectsevere
Worm:Win32/Gamarue.AUsevere
Worm:Win32/Rebhipsevere