Change log for definition version 1.271.884.0 RSS feed icon

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

If this page does not show change logs for the latest update (1.271.1162.0), please try hitting refresh or let us know through the feedback link at the bottom of this page.

Download the latest update

Select change log

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:

Get change log

Definition available date: Jul 12,2018 02:28 PM UTC

New definitions

PWS:Win32/Mozioxsevere

Updated definitions

HackTool:Win32/AutoKMShigh
HackTool:Win32/Virledi!rfnhigh
HackTool:Win32/Virledi.Ahigh
HackTool:Win32/Wpakillhigh
SoftwareBundler:MSIL/Wizremhigh
SoftwareBundler:Win32/Dlhelperhigh
TrojanDownloader:Win32/Adloadhigh
TrojanDownloader:Win32/Adload!rfnhigh
Backdoor:Linux/Mirai!rfnsevere
Backdoor:MSIL/Bladabindi!rfnsevere
Backdoor:MSIL/Boilod.Asevere
Backdoor:MSIL/Noancooe.Asevere
Backdoor:MSIL/Sisbot.Asevere
Backdoor:Win32/Dodiw.Asevere
Backdoor:Win32/Etumbot!rfnsevere
Backdoor:Win32/SdBot!rfnsevere
Backdoor:Win32/Simbotsevere
DDoS:Linux/Lightaidra!rfnsevere
Exploit:O97M/CVE-2017-11882!rfnsevere
PWS:Win32/Primarypass.Asevere
Ransom:Win32/GandCrab!rfnsevere
Ransom:Win32/GandCrab.AEsevere
Ransom:Win32/Genasomsevere
SupportScam:JS/TechBrolo!rfnsevere
Trojan:HTML/Phishsevere
Trojan:HTML/Redirector!rfnsevere
Trojan:Java/Adwindsevere
Trojan:JS/HideLink!rfnsevere
Trojan:JS/Redirector!rfnsevere
Trojan:MSIL/CryptInject!rfnsevere
Trojan:Win32/Beaugritsevere
Trojan:Win32/CoinMiner!bitsevere
Trojan:Win32/CoinMiner!rfnsevere
Trojan:Win32/CoinMiner.AC!bitsevere
Trojan:Win32/CoinMiner.DAsevere
Trojan:Win32/Desurou.Asevere
Trojan:Win32/Dibizor!rfnsevere
Trojan:Win32/Dynamer!acsevere
Trojan:Win32/Dynamer!rfnsevere
Trojan:Win32/Emotet.AC!bitsevere
Trojan:Win32/GandCrab!rfnsevere
Trojan:Win32/Gandcrab.AFsevere
Trojan:Win32/Genasep.Asevere
Trojan:Win32/Occamy.Asevere
Trojan:Win32/Occamy.Bsevere
Trojan:Win32/Pynamer.A!acsevere
Trojan:Win32/Simbot!rfnsevere
Trojan:Win32/Skeeyah.A!rfnsevere
Trojan:Win32/Suloc.Asevere
Trojan:Win32/Tepely!rfnsevere
Trojan:Win32/Tonmyesevere
Trojan:Win32/Urelas.AAsevere
Trojan:Win32/Zonsterarch.BWsevere
Trojan:Win64/Wdfload!rfnsevere
TrojanClicker:JS/Faceliker!rfnsevere
TrojanDownloader:JS/FakejQuery!rfnsevere
TrojanDownloader:VBS/Donoffsevere
TrojanDownloader:VBS/Donoff!amssevere
TrojanDownloader:Win32/Dofoil!rfnsevere
TrojanDownloader:Win32/Tugspay.Asevere
TrojanDropper:AutoIt/Pistolar.Asevere
TrojanDropper:Win32/Dexel!rfnsevere
TrojanDropper:Win32/Gepyssevere
TrojanDropper:Win32/Gepys!rfnsevere
TrojanSpy:MSIL/Golroted.Bsevere
VirTool:Win32/VBInjectsevere
Worm:Win32/Ainslot.Asevere
Worm:Win32/Autorunsevere
Worm:Win32/Gamarue!rfnsevere
Worm:Win32/Gamarue.ABsevere
Worm:Win32/Gamarue.Tsevere
Worm:Win32/Mira.Asevere
Worm:Win32/Mofksyssevere
Worm:Win32/Rahiwi!rfnsevere
Worm:Win32/Scano!rfnsevere
Worm:Win32/Sfone!rfnsevere