Scroll down and chose those settings related to js/vbs. Under “Configuration settings”, choose “Microsoft Defender Exploit Guard” and scroll to the “Attack Surface Reduction” section. If you’ve chosen an existing profile, select “Properties” and then “Settings”. For “Profile type”, select “Endpoint Protection”. Create a new protection profile or choose an existing endpoint protection profile. If you have access to Intune, select “Devices”, then “Configuration profiles”. To set up ASR rules, you can use a variety of methods. With Windows 10, version 1709 (RS3, build 16299) or greater you can set up an ASR rule to block JavaScript and VBScript. Without an Enterprise license, you lose some management capabilities including monitoring, analytics and workflows, which are available in Defender for Endpoint, as well as reporting and configuration capabilities in the Microsoft 365 Security Center. Even with a license of Windows 10 Professional and not the full license of Windows 10 Enterprise or Microsoft 365 E5, you can gain protections against JavaScript or VBScript. Next, you can use attack surface reduction (ASR) capabilities in Microsoft Defender ATP to further defend your network. js file type and adjust it to be opened with Notepad. On a single workstation, open the default apps and then click on “Choose default apps by file type”. Here’s another method that has been around for many years: You can reassociate a given file type with another file type. Reassociate untrusted file types with another file type For web-based portals, you can easily do this by documenting what is and is not allowed on the site. Clearly communicate to your users what file types are and are not allowed. You should also regularly review the files you allow through firewalls, email, file transfers and any other means. Review all the file types you block on a regular basis and allow only those file types you want to receive. There is no logical reason to be receiving or sending JavaScript files to the average user. Block JavaScript at the email gatewayįirst and foremost, block. You have several options to block or change the default behavior to better protect workstations. When the user clicks on the upgrade option, a JavaScript file is downloaded and executes malware.
There have been several recent reports of fake updaters that spoof Google Chrome, Mozilla Firefox, and Internet Explorer landing pages.
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