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Date: Wed, 31 Jan 2018 16:44:37 +0100 From: Yago Jesus <yjesus@...urity-projects.com> To: fulldisclosure@...lists.org Subject: [FD] Microsoft Anti Ransomware mitigation bypass Hi, Since Windows 10 Fall Creators Update, Microsoft added protection for Ransomware in their product ‘Windows Defender’ By default, Office executables are included in the whitelist so these programs could make changes in protected folders without restrictions. This access level is granted even if a malicious user uses OLE/COM objects to drive Office executables programmatically. So a Ransomware developer could adapt their software to use OLE objects to change / delete / encrypt files invisibly for the files owner. More info with PoC code here (Also the surprising answer from Microsoft ) : http://www.securitybydefault.com/2018/01/microsoft-anti-ransomware-bypass-not.html _______________________________________________ Sent through the Full Disclosure mailing list https://nmap.org/mailman/listinfo/fulldisclosure Web Archives & RSS: http://seclists.org/fulldisclosure/
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