Change log for definition version 1.249.990.0 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 04:51 AM UTC

New definitions

Updated definitions

Adware:Win32/Hebogohigh
BrowserModifier:Win32/Webaltahigh
HackTool:MSIL/Boilod.Ahigh
SoftwareBundler:MSIL/Wizremhigh
SoftwareBundler:Win32/Mizenotahigh
TrojanDownloader:Win32/Adload!rfnhigh
HackTool:Win32/AutoKMS!rfnmoderate
Backdoor:MSIL/Bladabindi!rfnsevere
Backdoor:MSIL/Noancooe.Csevere
Backdoor:Win32/Gaertob.Asevere
Backdoor:Win32/Nosrawec.Asevere
Backdoor:Win32/Qakbot.Tsevere
Backdoor:Win32/SdBot!rfnsevere
Backdoor:Win32/Slingup!rfnsevere
Backdoor:Win32/Xtrat.ACsevere
DDoS:Win32/Nitol.Bsevere
Exploit:HTML/IframeRef!rfnsevere
Exploit:Java/CVE-2012-4681!rfnsevere
Exploit:O97M/CVE-2017-0199!rfnsevere
Exploit:Win32/CVE-2012-0158!rfnsevere
Exploit:Win32/CVE-2013-3906!rfnsevere
PWS:Win32/Fareitsevere
PWS:Win32/Fareit!rfnsevere
PWS:Win32/Frethog!rfnsevere
Ransom:AndroidOS/LockScreen!rfnsevere
Trojan:AndroidOS/GingerMaster!rfnsevere
Trojan:HTML/Redirector!rfnsevere
Trojan:JS/Redirector!rfnsevere
Trojan:MSIL/CoinMiner!rfnsevere
Trojan:Win32/Carberp.Ksevere
Trojan:Win32/CoinMiner!rfnsevere
Trojan:Win32/Dynamer!acsevere
Trojan:Win32/Floxif!rfnsevere
Trojan:Win32/Goabeny!rfnsevere
Trojan:Win32/Itagomoko!rfnsevere
Trojan:Win32/Lethic!rfnsevere
Trojan:Win32/Qzonit.A!bitsevere
Trojan:Win32/Rofin!rfnsevere
Trojan:Win32/Ronohu!rfnsevere
Trojan:Win32/Salgorea.C!dhasevere
Trojan:Win32/Sarvdap.Asevere
Trojan:Win32/Sodebral.Esevere
Trojan:Win32/Startpage!rfnsevere
Trojan:Win32/Swrort!rfnsevere
Trojan:Win32/Vundo!rfnsevere
Trojan:Win32/Zonsterarch.BWsevere
Trojan:Win64/Alureon!rfnsevere
TrojanDownloader:JS/Nemucod!rfnsevere
TrojanDownloader:MSIL/Pstinb.Asevere
TrojanDownloader:O97M/Donoff!rfnsevere
TrojanDownloader:Win32/Brantall!rfnsevere
TrojanDownloader:Win32/Dofoil.ACsevere
TrojanDownloader:Win32/Garveep.Bsevere
TrojanDownloader:Win32/Gendwnurl!rfnsevere
TrojanDownloader:Win32/Harnig!rfnsevere
TrojanDownloader:Win32/Latot!rfnsevere
TrojanDownloader:Win32/Subroate!rfnsevere
TrojanDownloader:Win32/Tugspay.Asevere
TrojanDropper:Win32/Bunitu.Gsevere
TrojanDropper:Win32/Miniduke!rfnsevere
TrojanDropper:Win32/Randrew.A!bitsevere
TrojanDropper:Win32/Woozlist.Bsevere
TrojanProxy:Win32/Tarayt!rfnsevere
TrojanSpy:MSIL/Golroted.Esevere
TrojanSpy:MSIL/Omaneat.Bsevere
VirTool:MSIL/Injectorsevere
VirTool:MSIL/Subti.Nsevere
VirTool:Win32/DelfInjectsevere
VirTool:Win32/Injectorsevere
VirTool:Win32/Vbindersevere
Worm:Win32/Gamarue!rfnsevere
Worm:Win32/Goldrv!rfnsevere
Worm:Win32/Rebhipsevere