Change log for definition version 1.265.726.0 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: Apr 16,2018 05:20 AM UTC

New definitions

Updated definitions

BrowserModifier:Win32/Diplugemhigh
Dialer:Win32/Adialerhigh
Dialer:Win32/WebDiallerhigh
HackTool:Win32/Virledi.Ahigh
SoftwareBundler:Win32/ICLoaderhigh
SoftwareBundler:Win32/Techsnabhigh
Trojan:Win32/Cinmus.Ohigh
Trojan:Win32/Startpagehigh
TrojanDownloader:Win32/Adloadhigh
TrojanDownloader:Win32/Adload!rfnhigh
Backdoor:Win32/Bergat.Asevere
Backdoor:Win32/Bifrosesevere
Backdoor:Win32/Kelihossevere
Backdoor:Win32/Smadowsevere
PWS:Win32/Fignotok.Asevere
PWS:Win32/OnLineGamessevere
PWS:Win32/Zbot!VMsevere
Rogue:Win32/FakeReansevere
Rogue:Win32/Winwebsecsevere
Trojan:BAT/Delwin.Rsevere
Trojan:HTML/Phish.Csevere
Trojan:JS/Redirector!rfnsevere
Trojan:Win32/BHOsevere
Trojan:Win32/Genasep.Asevere
Trojan:Win32/Lazioksevere
Trojan:Win32/Salgorea.C!dhasevere
Trojan:Win32/Seodec.Asevere
Trojan:Win32/Suloc.Asevere
Trojan:Win32/Tinba.Fsevere
Trojan:Win32/Tonmyesevere
Trojan:Win32/VBClonesevere
Trojan:Win32/Vundosevere
Trojan:Win32/Zonsterarch.BWsevere
TrojanDownloader:Win32/Dofoil.ACsevere
TrojanDownloader:Win32/Harnigsevere
TrojanDownloader:Win32/Harnig.Ssevere
TrojanDownloader:Win32/Neojit.Asevere
TrojanDownloader:Win32/Pakernat.Asevere
TrojanDownloader:Win32/Renossevere
TrojanDownloader:Win32/Tugspay.Asevere
TrojanDownloader:Win32/Waledac.ALsevere
TrojanDropper:Win32/Dooxud.Asevere
TrojanDropper:Win32/Emold.Csevere
TrojanDropper:Win32/Sirefefsevere
TrojanDropper:Win32/Zegost.Bsevere
TrojanSpy:MSIL/Omaneat.Bsevere
VirTool:Win32/Acillatemsevere
VirTool:Win32/Injectorsevere
VirTool:WinNT/Vantisevere
Worm:Win32/Autorunsevere
Worm:Win32/Gamarue!rfnsevere
Worm:Win32/Mira.Asevere
Worm:Win32/Pushbotsevere
Worm:Win32/Rebhipsevere
Worm:Win32/VBsevere