How Businesses Can Protect Against Ransomware Attacks

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Ransomware Attacks Are on the Rise
Is Your Business Prepared?

A global logistics company recently suffered a ransomware attack that locked their entire system, halting deliveries, disrupting supply chains, and costing millions in lost revenue.

Cybercriminals encrypted critical business data and demanded a ransom in Bitcoin to restore access. Without a comprehensive backup strategy or a ransomware protection plan, the company had no choice but to pay the ransom—but even after payment, only partial data was recovered.

Unfortunately, this is a common reality for businesses. Ransomware attacks have surged in recent years, targeting industries such as finance, healthcare, legal services, and SMBs. Without strong preventive measures, companies risk financial loss, reputational damage, and operational downtime.

How Ransomware Attacks Work

Cybercriminals using sophisticated AI attacks no longer rely on simple malware infections—they use targeted ransomware-as-a-service (RaaS) operations to deploy attacks that bypass traditional security measures.

Here’s how a ransomware attack typically unfolds:

Step 1: Initial Access

Upgrade existing Microsoft 365 security to keep defenses strong

Step 2: Lateral Movement

Once inside, they escalate privileges and spread across the network, identifying critical files and backup locations.

Step 3: Data Encryption & Ransom Demand

The malware encrypts files, rendering them inaccessible. The business then receives a ransom note demanding payment in cryptocurrency.

Step 4: Double Extortion 

Attackers often threaten to leak stolen data unless the ransom is paid—putting businesses at risk of regulatory fines and lawsuits.

Best Practices for
Ransomware Prevention

How to prevent ransomware attacks

1

Strengthen Email Security & Phishing Defences

Phishing emails remain the primary entry point for ransomware attacks. Employees unknowingly click on malicious links or download infected attachments.

Solution:

  • Enable Microsoft Defender for Office 365 to filter out phishing emails.
  • Implement DMARC, SPF, and DKIM to prevent email spoofing.
  • Conduct regular phishing awareness training to help employees spot fake emails.

2

Enforce Zero Trust Security & Network Segmentation

Once attackers gain access, they often move laterally to infect other systems. A Zero Trust model ensures that even if one account is compromised, the damage remains contained.

Solution:

Apply role-based access control (RBAC) to limit user permissions.
Use Microsoft 365 Conditional Access policies to verify user identities.
Implement network segmentation to isolate critical data.

How to prevent ransomware attacks

Cyber risk mitigation

3

Implement Robust Backup & Disaster Recovery Plans

Businesses that regularly back up their data can recover without paying the ransom. However, attackers often target backups first, rendering them useless.

Solution:

  • Use immutable, offline backups that cannot be altered by ransomware.
  • Implement automatic cloud backups through Microsoft 365.
  • Regularly test backup restoration processes to ensure data integrity.

4

Patch Software & Monitor for Unusual Activity

Ransomware often exploits unpatched vulnerabilities in outdated systems. Businesses that delay software updates are at higher risk.

Solution:

  • Deploy automated patch management for operating systems and applications.
  • Use AI-driven security analytics to detect unusual file encryption activities.
  • Monitor endpoint and network activity with Microsoft Defender for Endpoint.
Microsoft 365 ransomware protection

How Microsoft 365 Protects
Businesses from Ransomware

  • Microsoft Defender for Endpoint
    Detects and blocks ransomware threats in real time.
  • Microsoft 365 Security Audit
    Helps identify security misconfigurations that could lead to an attack.
  • OneDrive Ransomware Detection & Recovery
    Automatically detects suspicious file encryption and enables easy rollback.
  • Multi-Factor Authentication (MFA)
    Prevents attackers from accessing Microsoft 365 accounts using stolen credentials.

Conclusion: Ransomware Prevention
is Better Than Paying the Ransom

Ransomware attacks can cripple businesses, but they are preventable. Companies that proactively strengthen security, enforce Zero Trust policies, and invest in Microsoft 365 security tools can minimise risk and avoid costly downtime.

Want to protect your business from ransomware?

Contact Solid Systems today for expert cyber security solutions!

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How to prevent ransomware attacks