Proactive IT Strategy at Thriveon

Microsoft-Specific Cyber Crimes: Understanding the Risks

Written by Thriveon | 9/22/25 3:00 PM

Microsoft’s extensive range of products, like Office 365 and Azure, is the backbone of productivity for millions of businesses worldwide. Their widespread adoption, however, also makes them a prime target for cyber criminals. These attackers employ various tactics to exploit vulnerabilities and trick users into releasing sensitive data or making financial transactions.

Understanding the specific cyber threats aimed at Microsoft’s ecosystem is the first step toward protecting your organization.

Read: Get the Most Out of Microsoft 365 for Your Workplace

1. Phishing Attacks

One of the most common and effective cyber crimes is phishing. Hackers craft fake login pages or malicious emails that mimic Microsoft services like Outlook, OneDrive or Teams. Once employees enter their credentials, attackers gain unauthorized access to sensitive company data.

An example of this is when an attacker poses as Microsoft support and sends a “password reset” email. This spoofed email will use a similar name, subject and domain resembling a real message from Microsoft, but the button links to a malicious website that captures the user’s login credentials instead. The website often looks incredibly convincing, often using Microsoft’s color scheme and logo.

2. Business Email Compromise (BEC)

Microsoft 365 email accounts are prime targets for business email compromise (BEC) schemes. Hackers hijack an account and impersonate executives or vendors to trick employees into sending payments or revealing sensitive information. An example of BEC is when a compromised Office 365 inbox sends convincing invoices that reroute payments to fraudulent accounts.

3. Microsoft Office Macros Exploitation

Macros is a tool that makes a set of actions or rules you can utilize within the Office Suite to automate tasks and save time. Cyber criminals can hide malicious code in files for Word, Excel and PowerPoint. When opened, these files download malware or delete files from the victim’s device.

4. Ransomware Attacks

Windows systems are the most common target for ransomware attacks. Cyber criminals exploit unpatched vulnerabilities to encrypt files and hold them hostage, demanding payment for the decryption key. These attacks often exploit vulnerabilities in software, including zero-day flaws,which are when undisclosed weaknesses in a program are actively exploited.

How to Protect Your Business

Although Microsoft has implemented security measures to help protect users, it’s ultimately a shared responsibility. Taking proactive measures can help your business stay ahead of Microsoft-specific cyber crimes.

  • Implement multi-factor authentication (MFA): Require MFA for all Microsoft accounts to reduce the risk of unauthorized access.
  • Keep systems updated: Regularly patch Windows, Office and other Microsoft products to close known vulnerabilities. If you can’t remember to install updates, implement automatic updates.
  • Train employees: Human error is a significant vulnerability. Regular cybersecurity training and keeping staff aware of tactics that cyber criminals use reduce the risk of cyber attacks.
  • Back up critical data: Maintain secure, offsite backups of essential data so ransomware can’t cripple operations.
  • Go passwordless: Microsoft is pushing for passwordless authentication, which is more secure than passwords.
  • Be cautious of suspicious messages: Always be skeptical of unsolicited emails and messages that ask for personal information or contain suspicious links. Hover over links to check the real destination address. Never open unexpected attachments. If in doubt, go directly to the official website instead of clicking a link.
  • Disable macros: Disable macros by default and only enable them for trusted files. Avoid opening documents and files that contain macros.
  • Download from trusted sources: Only download software from the official Microsoft store or reputable partner websites.

Work with a Trusted IT Partner Like Thriveon

A final proactive measure is to consider partnering with a managed service provider (MSP) like Thriveon. Our Fractional CIO can proactively monitor, patch and secure your IT environment, ensuring you don’t fall victim to these Microsoft-specific crimes. We also provide robust cybersecurity measures to keep your company safe and secure.

Schedule a meeting today to see how we can keep your business safe.