勒索软件^(Ransomware)是最痛苦的恶意软件版本之一，它会锁定文件，甚至访问计算机。如果您使用的是Microsoft Office 365，则可以设置规则以确保阻止某些勒索软件文件。^{(block some ransomware files.)} 电子邮件^(Email)是勒索软件^(Ransomware)攻击的操作源，其中文件以JavaScript、批处理和可执行文件等形式发送。在这篇文章中，我们将展示如何创建电子邮件规则以防止Microsoft 365商业^(Business)版中的勒索软件^(Ransomware)。

使用Exchange Online时，所有电子邮件都会通过Exchange Online Protection ( EOP )。它实时隔离和扫描所有电子邮件和电子邮件附件，包括病毒和其他恶意软件进入和离开系统。因此，只有当您想要自定义管理员时，才能使用Exchange管理中心进行公司特定的过滤自定义。

创建^(Create)电子邮件规则以防止Microsoft 365中的勒索软件^(Ransomware)

Microsoft 365 商业版提供了一个可以配置为保护所有收件箱的管理中心。您可以通过调整应用于电子邮件的规则来进一步加强保护。

转到Admin Center > Exchange > Choose 从左侧菜单中选择邮件流。^{(Mail Flow)}然后单击规则选项卡下的加号 (+)，然后选择创建新规则^{(Create a new rule )}选项。

打开规则页面后，输入规则的名称，然后单击末尾的更多选项。^{(More Options)}在Apply^(Apply) this rule if下选择Any Attachment，然后选择file extension includes these words。

然后您可以选择指定单词或短语，即您希望应用规则的文件扩展名。可以在此处停止已知携带Marcos或任何可执行文件的文件。^(Marcos)使用加号 (+) 一次添加一个。最后，向下滚动查看列表，如果没问题，选择确定。

您可以通过添加新条件来进一步自定义它。选择添加条件^{(add a condition)}，然后在 执行以下^{(Do the following)}操作下选择一个条件。您可以在此处选择通过 消息通知收件人^{(Notify the recipient with a message)}。然后输入您希望收件人看到的通知消息。选择确定。^{(Select OK.)}  当一封带有受限附件的电子邮件包含指定扩展名之一时，将向收件人发送一封电子邮件，以警告他们可能存在的威胁。

如果在创建规则时存在已知的受信任用户，您还可以添加例外。^{(add exceptions)}它将确保如果您收到此类文件，它不会被阻止，并直接发送到收件箱。

Microsoft为消费者和企业构建了出色的功能。在Windows 10 PC 上，您可以使用Windows 安全应用程序^{(Windows Security App)}来保护文件免受勒索软件^(Ransomware)的侵害，然后您可以进行篡改保护设置，从而确保您的个人和系统文件始终安全。

对于企业^(Business)，Microsoft提供了大量可用于防止勒索软件^(Ransomware)的设置和功能。它包括Exchange Online 保护^{(Exchange Online Protection)}、高级威胁保护^{(Advanced Threat Protection)}  ( ATP )、SharePoint Online和OneDrive保护以及回收站^{(Recycle Bins)}。

Create email rules to prevent Ransomware in Microsoft 365 Business

Ransomware is one of the most painful versions of malware that locks down files, and even access to a computer. If you are using Microsoft office 365, then you can set up rules which will make sure to block some ransomware files. Email is the op source of Ransomware attacks where files are sent in the form of JavaScript, batch, and executables, and so on. In this post, we will show how you can create email rules to prevent Ransomware in Microsoft 365 Business.

When using Exchange Online, all emails pass through the Exchange Online Protection (EOP). It quarantines and scans in real-time all email and email attachments, both entering and leaving the system for viruses and other malware. So only when you want to customize administrators can make company-specific filtering customizations using the Exchange admin center.

Create email rules to prevent Ransomware in Microsoft 365

Microsoft 365 Business offers an admin center that can be configured to protect all the inboxes. You can increase the protection further by tweaking the rules applied to emails to strengthen further.

Go to Admin Center > Exchange > Choose Mail Flow from the menu on the left. Then click on the plus(+) symbol under the rules tab, and then choose the Create a new rule option.

Once the rule page is open, enter the name of the rule, and click on More Options available at the end. Select Any Attachment under Apply this rule if, and then select file extension includes these words.

You can then choose to specify words or phrases, i.e., file extensions that you want the rule to be applied. Files that are known to carry Marcos or any executable can be stopped here. Use the plus (+) symbol to add them one at a time. Finally, scroll down to review the list, and if it’s alright, choose OK.

You can further customize it by adding a new condition. Choose to add a condition, and then choose a condition under Do the following. Here you can select to Notify the recipient with a message.  Then enter the notification message you want the recipient to see. Select OK.  An email will be sent to the recipients when an email with restricted attachments containing one of the specified extensions to warn them of the possible threat.

You can also add exceptions if there is a known trusted user when creating the rule. It will make sure that if you receive such files, it will not be blocked, and sent to the inbox directly.

Microsoft has built excellent features for both consumers and businesses. On Windows 10 PC, you can use the Windows Security App to safeguard files from Ransomware, and then you have tampered protection settings, which makes sure your personal and system files are always secure.

For Business, Microsoft offers a plethora of settings and features that can be used to protect from Ransomware. It includes Exchange Online Protection, Advanced Threat Protection  (ATP), SharePoint Online, and OneDrive protection along with Recycle Bins.

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