This rule prevents malicious code from being written to disk. This rule targets a typical behavior where malware uses Office as a vector to break out of Office and save malicious components to disk, where they persist and survive a computer reboot. This rule prevents Office apps, including Word, Excel, and PowerPoint, from creating executable content. ![]() Block Office applications from creating executable content Some legitimate line-of-business applications might also use behaviors like this, including spawning a command prompt or using PowerShell to configure registry settings. This is a typical malware behavior, especially malware that abuses Office as a vector, using VBA macros and exploit code to download and attempt to run additional payload. This includes Word, Excel, PowerPoint, OneNote, and Access. This rule blocks Office apps from creating child processes. js file)īlock all Office applications from creating child processes This rule blocks the following file types from launching from email in Microsoft Outlook or and other popular webmail providers: Block executable content from email client and webmail In general, the rules for Office apps apply to only Word, Excel, PowerPoint, OneNote, or to Outlook.Įxcept where specified, attack surface reduction rules don't apply to any other Office apps. One of the more important features is the Attack Surface Reduction Rules or ASR.Įach rule description indicates which apps or file types the rule applies to. Microsoft has made big advances with the Windows Defender technology shipped on Windows 10 and Windows Server 2016. ![]() Learn how to use ATP ASR rules on Windows Defender to significantly improve your security with a few basic rules
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