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Change logs for security intelligence update version 1.459.215.0

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

9/15/2026 2:57:22 AM

Added threat detections

Name Severity
Backdoor:Win64/ToneShell.E!dha severe
Trojan:Win64/ValleyRat.RH!MTB severe
Trojan:Win64/Yogi!rfn severe
TrojanDropper:MSIL/YesOpcode.C!dha severe
TrojanDropper:Win64/YesOpcode.A!dha severe
TrojanDropper:Win64/YesOpcode.B!dha severe

Updated threat detections

Name Severity
Backdoor:Python/Meterpreter.C severe
Backdoor:Win64/CobaltStrike!rfn severe
Exploit:O97M/CVE-2017-11882.NUB!MTB severe
Exploit:Perl/CVE-2010-0738 severe
HackTool:Python/Impacket.Q!MSR high
HackTool:Win32/Malgent!MSR high
HackTool:Win32/Patcher high
HackTool:Win64/CobaltStrike!rfn high
Ransom:Win32/BlackCat!rfn severe
Ransom:Win32/Helldown!rfn severe
Ransom:Win32/Inc!rfn severe
Ransom:Win32/Qilin!rfn severe
Ransom:Win64/Babuk!rfn severe
Ransom:Win64/Gentlemen!rfn severe
Trojan:AndroidOS/Autopay!rfn severe
Trojan:AndroidOS/AVerseFalc!rfn severe
Trojan:JS/QakbotLNK!rfn severe
Trojan:Linux/Multiverze!rfn severe
Trojan:MSIL/DCRat!rfn severe
Trojan:O97M/DDownloader!rfn severe
Trojan:PDF/Phish!rfn severe
Trojan:Python/Multiverze!rfn severe
Trojan:Script/Multiverze!rfn severe
Trojan:VBS/Emotet!rfn severe
Trojan:VBS/Obfuse!MTB severe
Trojan:VBS/Obfuse!rfn severe
Trojan:Win32/DelpLdrmci!rfn severe
Trojan:Win32/Egairtigado!rfn severe
Trojan:Win32/Emotet!rfn severe
Trojan:Win32/Etset!rfn severe
Trojan:Win32/Fauppod!rfn severe
Trojan:Win32/Kepavll!rfn severe
Trojan:Win32/Keydoor!MSR severe
Trojan:Win32/Lazy!rfn severe
Trojan:Win32/Leonem!rfn severe
Trojan:Win32/Malgent severe
Trojan:Win32/Malgent!MSR severe
Trojan:Win32/Meterpreter.A severe
Trojan:Win32/NSISInject!rfn severe
Trojan:Win32/Pomal!rfn severe
Trojan:Win32/Predator!rfn severe
Trojan:Win32/PureRat!rfn severe
Trojan:Win32/Qakbot!rfn severe
Trojan:Win32/QbotLNK!rfn severe
Trojan:Win32/Qwexlafiba!rfn severe
Trojan:Win32/Ravartar!rfn severe
Trojan:Win32/Seheq!rfn severe
Trojan:Win32/Sehyioa.A!cl severe
Trojan:Win32/ShortSeek!rfn severe
Trojan:Win32/Skeeyah.B!rfn severe
Trojan:Win32/Suschil!rfn severe
Trojan:Win32/SystemBC!rfn severe
Trojan:Win32/Vexlorn severe
Trojan:Win32/Vindor!MTB severe
Trojan:Win64/CobaltStrike!rfn severe
Trojan:Win64/Emotetcrypt!rfn severe
Trojan:Win64/EmotetPacker!rfn severe
Trojan:Win64/IcedID!rfn severe
Trojan:Win64/Tedy!MTB severe
Trojan:Win64/Tedy!rfn severe
Trojan:Win64/VMProtect!MTB severe
TrojanDownloader:JS/Qakbot!rfn severe
TrojanDownloader:O97M/Emotet!rfn severe
TrojanDownloader:O97M/Qakbot!rfn severe
TrojanDownloader:Win32/Begseabug!rfn severe
TrojanDropper:AndroidOS/SAgent!rfn severe