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Ransomware Protection: 21 Ways to Prepare for the Next Attack

What Is Ransomware Protection?

Ransomware protection involves securing your devices against malicious software that encrypts data and demands payment. Key defenses include maintaining robust offline backups, utilizing security software with behavioral monitoring, enabling OS-level folder restrictions, applying software patches, and exercising caution with email links.

Ransomware protection strategies:

  • Keep offline, encrypted, and tested backups: Maintain air-gapped or immutable backups, encrypt backup data, and regularly test restoration procedures to ensure recovery is possible after an attack.
  • Apply least privilege access: Limit user, application, and service permissions to only what is required, reducing the ability of ransomware to spread or access sensitive systems.
  • Segment networks and critical systems: Separate critical assets, backup infrastructure, and administrative systems from general user networks to contain attacks and limit lateral movement.
  • Prepare and test an incident response plan: Establish documented response procedures, escalation paths, communication plans, and recovery processes, then validate them through exercises and simulations.
  • Protect and prioritize critical data: Identify business-critical systems and sensitive data, apply stronger protections, and focus monitoring and recovery efforts on the assets most important to operations.

Ransomware protection techniques and technologies:

  • Multifactor authentication: Require additional verification beyond passwords to reduce the risk of account compromise and unauthorized access.
  • Application control and allowlisting: Restrict execution to approved applications, preventing unauthorized or malicious software from running.
  • Script, macro, and command-line control: Limit the use of scripting engines, Office macros, and administrative tools commonly abused in ransomware attacks.
  • Browser extension control: Manage and restrict browser extensions to reduce risks from malicious or vulnerable add-ons.
  • Email, web, and DNS security controls: Block phishing attempts, malicious downloads, dangerous websites, and known ransomware infrastructure.
  • Endpoint protection and EDR: Detect, block, investigate, and contain ransomware activity on endpoints using behavioral monitoring and response capabilities.
  • Centralized policy management: Centralize security controls and enforcement policies to improve consistency and visibility.
  • Exception and trusted installer workflows: Provide controlled processes for approving legitimate software and activities without weakening security controls.
  • Reporting, audit trails, and SIEM integration: Collect security telemetry, maintain audit records, and integrate with security operations platforms for investigation and response.

In this article:

How Ransomware Attacks Work

Common Ransomware Infection Methods

Ransomware reaches systems through several common attack vectors:

  • Phishing emails: Phishing emails remain the most common ransomware delivery method. Attackers send messages containing malicious attachments or links that install malware when opened, often impersonating trusted organizations, suppliers, or colleagues to increase the likelihood of user interaction.
  • Exploiting software vulnerabilities: Attackers scan internet-facing systems for unpatched operating systems, applications, and remote access services. Once a vulnerability is identified, ransomware can be deployed without requiring user action. Remote Desktop Protocol (RDP) services with weak credentials are also common targets.
  • Compromised websites and malicious advertising: Attackers use compromised websites and malicious advertisements to deliver ransomware to users who visit infected pages or interact with malicious content.
  • Infected software downloads: Ransomware can be distributed through software downloads that have been modified to include malicious code, causing infection when the software is installed.
  • Supply chain attacks: Attackers compromise trusted vendors, software providers, or service providers and use those relationships to distribute ransomware to downstream organizations.
  • Stolen credentials: Attackers may purchase stolen credentials from criminal marketplaces, use them to gain access to an environment, and then manually deploy ransomware across systems.

What Happens After Ransomware Enters a Network

Once inside a network, ransomware operators often expand access before triggering encryption. They move laterally between systems, elevate privileges, and identify critical assets such as file servers, databases, and backup repositories. This stage can last from hours to weeks, depending on the sophistication of the attack.

Attackers may disable security tools, delete backup files, and establish persistence mechanisms to maintain access. They may also collect information about the organization's infrastructure, security controls, and other valuable data.

After preparation is complete, the ransomware payload is executed. Files are encrypted, systems may become inaccessible, and ransom notes are displayed with payment instructions. Business operations can be disrupted until systems are restored or rebuilt.

Encryption Ransomware vs. Double Extortion: Understanding the Difference

Traditional encryption ransomware focuses on encrypting files and demanding payment for a decryption key. The primary objective is to deny access to data and disrupt operations until the victim pays the ransom or restores data from backups.

Double extortion ransomware adds a second layer of pressure. Before encrypting files, attackers steal sensitive data from the victim's environment. They then threaten to publish, sell, or leak the stolen information unless an additional ransom is paid. This approach increases the consequences of an attack, even when reliable backups are available.

Because of double extortion tactics, ransomware protection must address both data availability and confidentiality. Organizations need controls that prevent unauthorized data access, detect data exfiltration, and support incident response in addition to maintaining recoverable backups.

Core Ransomware Protection Strategies 

Ransomware protection strategies are organization-wide practices that reduce the impact of an attack, limit the spread of ransomware, and support recovery when an incident occurs. These are not specific tools, but security practices and operating models that help organizations stay resilient.

1. Keep Offline, Encrypted, and Tested Backups

Maintaining secure, offline backups is one of the most important ransomware protection strategies. Offline backups, also known as air-gapped or immutable backups, are disconnected from production systems, preventing ransomware from accessing and encrypting them during an attack. Encryption ensures that if backup media are stolen or lost, the data remains protected from unauthorized access.

Backups should be updated regularly and stored according to a defined retention policy. Organizations should also maintain multiple backup copies across separate environments to reduce the risk that a single compromise affects all recovery options.

Testing backups is equally important. Some organizations discover too late that their backups are incomplete, corrupted, or not restorable. Routine testing validates the integrity and usability of backups and ensures that recovery processes work as expected. Documented and practiced recovery procedures help minimize downtime and data loss.

2. Apply Least Privilege Access

The principle of least privilege requires that users, applications, and services have only the minimum access necessary to perform their tasks. Limiting privileges reduces the impact of ransomware because compromised accounts cannot access or encrypt data and systems beyond their scope.

Organizations should regularly review permissions, remove unnecessary access, and prevent privilege creep. Role-based access control can help ensure that access aligns with current job responsibilities. Automated monitoring can also identify excessive permissions, unauthorized changes, or accounts with risky access levels.

By reducing unnecessary access, organizations limit the ability of ransomware to spread across systems, encrypt sensitive data, or disable security controls.

3. Segment Networks and Critical Systems

Network segmentation limits how far ransomware can move after it enters an environment. By separating workstations, servers, backups, administrative systems, and sensitive data repositories, organizations can reduce the radius of an attack.

Critical systems should be isolated from general user networks wherever possible. Access between segments should be controlled, monitored, and limited to approved business needs. Segmentation is especially important for protecting backup infrastructure, domain controllers, file servers, and systems that support essential operations.

Effective segmentation does not prevent every ransomware incident, but it can slow attackers down, contain compromised systems, and give security teams more time to respond.

4. Prepare and Test an Incident Response Plan

A ransomware incident response plan defines what the organization should do when ransomware is detected. The plan should identify roles, escalation paths, communication procedures, legal and regulatory considerations, and recovery steps.

Organizations should test the plan through tabletop exercises and technical simulations. These exercises help teams understand how to isolate infected systems, preserve evidence, notify stakeholders, and restore operations. Practicing response procedures before an incident reduces confusion and improves decision-making under pressure.

An effective response plan should also include criteria for engaging external incident response teams, cyber insurance providers, legal counsel, and law enforcement.

5. Protect and Prioritize Critical Data

Organizations should understand which data and systems are most critical to business operations. Data classification and asset prioritization help security teams focus ransomware protection efforts on the systems that matter most.

Sensitive and business-critical data should have stricter access controls, stronger monitoring, and more frequent backup validation. File shares and databases should be reviewed regularly to remove unnecessary data exposure and ensure that permissions are appropriate.

Prioritizing critical data helps organizations recover faster and reduces the operational impact of ransomware.

Ransomware Attack Protection Techniques and Technologies 

Ransomware protection techniques and technologies are specific security controls that help block, detect, or contain ransomware activity when an attack is attempted. These controls support the broader strategies above by enforcing protection at the identity, endpoint, application, browser, and security operations levels.

6. Multi-Factor Authentication

Multi-factor authentication (MFA) adds a layer of security to user accounts by requiring two or more verification methods, typically something the user knows, something they have, or something they are. MFA reduces the risk of unauthorized access, even if credentials are stolen or compromised.

MFA is especially important for remote access, administrator accounts, cloud applications, and email systems. By making it harder for attackers to use compromised credentials, MFA helps disrupt the ransomware attack chain and limits opportunities for lateral movement.

Organizations should use phishing-resistant authentication methods where possible and ensure that MFA is consistently enforced across high-risk access points.

7. Application Control and Allowlisting

Application control restricts systems so that only approved software can run. Unlike traditional security tools that attempt to block known malicious files, allowlisting prevents unauthorized applications from executing in the first place.

This reduces the risk of ransomware delivered through malicious executables, unauthorized downloads, or compromised websites. Application control policies can be based on trusted publishers, digital signatures, file hashes, approved directories, or predefined software catalogs.

Proper planning is important to avoid disrupting business operations. Policies should be tested in audit mode before full deployment, and procedures should exist for approving legitimate new applications.

8. Script, Macro, and Command-Line Control

Many ransomware attacks use scripts, macros, and legitimate administrative tools rather than traditional malware executables. Attackers often abuse PowerShell, Windows Script Host, JavaScript, Visual Basic scripts, Office macros, and command-line utilities to download payloads, move laterally, or disable security controls.

Security controls should restrict unnecessary scripting engines and administrative tools wherever possible. Office macros should be blocked by default, especially in documents originating from the internet. Script signing requirements can also prevent unsigned or untrusted code from executing.

Controlling script and command-line execution helps reduce the effectiveness of fileless attacks and malware loaders commonly used in ransomware campaigns.

9. Browser Extension Control

Browser extensions can introduce security risks because they often have access to web content, credentials, and browser functionality. Malicious or vulnerable extensions can be used to steal information, redirect users to malicious sites, or facilitate malware delivery.

Organizations should centrally manage browser extensions across managed devices. Administrators should be able to approve trusted extensions, block unauthorized add-ons, and monitor extension usage.

Limiting browser extensions reduces unnecessary attack surface and helps maintain a secure browsing environment.

10. Email, Web, and DNS Security Controls

Email, web, and DNS security controls help block common ransomware delivery paths. Secure email gateways can filter spam, block malicious attachments, scan URLs, and identify phishing attempts before messages reach users. Advanced tools may also use sandboxing to analyze suspicious files in an isolated environment.

Web security gateways help prevent users from accessing malicious websites, downloading infected files, or connecting to known ransomware infrastructure. DNS filtering can block access to dangerous domains and command-and-control servers.

Together, these controls reduce the likelihood that users will encounter or interact with ransomware delivery infrastructure.

11. Endpoint Protection and EDR

Modern endpoint protection platforms and endpoint detection and response tools help identify and stop ransomware at the device level. Endpoint protection can block known threats using signatures, reputation data, and behavioral detection, while EDR provides real-time monitoring, investigation, and response capabilities.

EDR tools can isolate infected endpoints, terminate malicious processes, and support forensic investigations. Centralized management consoles help security teams coordinate containment and response across the environment.

Regular updates, tuning, and monitoring help endpoint solutions remain effective against new ransomware techniques.

12. Centralized Policy Management

Managing ransomware protection controls across large environments requires centralized policy administration. A centralized platform allows administrators to create, deploy, monitor, and update security policies from a single location.

Centralized management improves visibility and reduces administrative overhead. Security teams can quickly identify policy gaps, verify compliance, and make organization-wide changes when new threats emerge.

Consistent policy enforcement helps reduce configuration drift and security weaknesses.

13. Exception and Trusted Installer Workflows

Security controls must allow legitimate business activity without weakening overall protection. Exception management workflows provide a structured process for reviewing, approving, documenting, and monitoring requests for software, scripts, or activities that would otherwise be blocked.

Trusted installer workflows allow approved deployment tools and software management platforms to install or update applications without bypassing security controls entirely. These workflows help organizations maintain strict execution policies while supporting routine software maintenance.

Effective workflows should include approval chains, expiration dates, justification tracking, and audit logging.

14. Reporting, Audit Trails, and SIEM Integration

Comprehensive reporting provides visibility into security events, blocked execution attempts, policy violations, and administrative actions. Detailed audit trails help organizations understand how ransomware attacks were prevented, investigate suspicious activity, and demonstrate compliance with security requirements.

Integration with SIEM, SOAR, and other security operations tools improves detection and response. Events from endpoints, identity providers, firewalls, email systems, and other controls can be correlated to provide a more complete view of ransomware-related activity.

Strong reporting and integration help security teams detect patterns, investigate incidents faster, and improve ransomware defenses over time.

A Prevention-First Approach to Ransomware Protection

A prevention-first approach focuses on reducing the likelihood that ransomware can enter the organization in the first place. These measures address common initial access paths, risky behaviors, exposed systems, and exploitable weaknesses before ransomware is deployed.

15. Patch Vulnerabilities Quickly

Attackers often exploit unpatched vulnerabilities in operating systems, applications, browsers, VPNs, and network devices to gain initial access. Prompt patching closes these gaps and reduces the attack surface available to ransomware operators.

Automated patch management tools can simplify deployment and help ensure timely updates. Organizations should prioritize patches based on severity, exploitability, exposure, and business criticality.

Regular vulnerability assessments and asset inventories help identify systems that need updates. A formal patch management process improves accountability, visibility, and consistency.

16. Reduce External Exposure

Internet-facing systems are frequent targets for ransomware operators. Organizations should regularly review exposed services, disable unnecessary remote access, and remove systems that do not need to be reachable from the internet.

Remote desktop services, VPN appliances, file transfer systems, and management interfaces should receive particular attention. Access should be limited to approved users, approved devices, and approved locations where possible.

Reducing external exposure lowers the number of opportunities attackers have to gain an initial foothold.

17. Harden System and Application Configurations

Secure configuration reduces the likelihood that attackers can exploit weak defaults, unnecessary services, or misconfigured systems. Organizations should disable unused services, remove unnecessary software, enforce secure settings, and apply baseline configuration standards.

Hardening should cover endpoints, servers, browsers, cloud services, identity platforms, and network devices. Configuration baselines should be reviewed and updated as environments change.

Consistent hardening makes it harder for ransomware operators to exploit avoidable weaknesses.

18. Train Employees to Recognize Ransomware Entry Points

Employees are often targeted during the early stages of ransomware campaigns. Security awareness training should focus on recognizing phishing emails, fraudulent websites, suspicious attachments, malicious links, and social engineering tactics.

Training is most effective when it is continuous rather than a one-time activity. Simulated phishing exercises, refresher courses, and timely security communications reinforce safe behavior.

Employees should also know how to report suspicious activity quickly so security teams can investigate potential threats before they escalate.

19. Monitor for Early Warning Signs

Ransomware attacks often begin with warning signs before encryption occurs. These may include unusual login attempts, suspicious email activity, unexpected administrative tool usage, new remote access patterns, or abnormal file access behavior.

Organizations should monitor for these early indicators and investigate anomalies quickly. Early detection can help security teams stop an intrusion before ransomware is deployed.

Monitoring should focus on behaviors associated with initial access, credential misuse, reconnaissance, and lateral movement.

20. Manage Third-Party and Supply Chain Risk

Third-party vendors, managed service providers, software suppliers, and external integrations can introduce ransomware risk. Attackers may compromise trusted partners or exploit software dependencies to reach target organizations.

Organizations should assess vendor security practices, limit third-party access, and review integrations regularly. Contracts and onboarding processes should define security requirements, notification obligations, and access expectations.

Reducing third-party risk helps prevent ransomware from entering through trusted external relationships.

21. Maintain an Accurate Asset Inventory

Organizations cannot protect systems they do not know exist. An accurate asset inventory helps security teams identify endpoints, servers, applications, cloud resources, and network devices that require protection.

Asset inventories support patching, exposure management, vulnerability scanning, and incident response. They also help identify unmanaged or outdated systems that may create ransomware risk.

Maintaining visibility across the environment is a foundational step in preventing ransomware incidents.

How Airlock Digital Stops Ransomware Before It Executes

Most ransomware defenses focus on detecting and responding to threats after they reach an endpoint. Airlock Digital takes a proactive, prevention-first approach: by enforcing a Deny by Default security model; it ensures only trusted applications, scripts, and processes are allowed to run. Untrusted and unauthorized software is blocked before it can execute, significantly reducing the attack surface and stopping malware and ransomware at the point of execution—before encryption ever begins.

Key capabilities of Airlock Digital:

  • Deny by Default model: Automatically blocks all untrusted and unauthorized applications, ensuring only approved software is permitted to execute.
  • Granular application control: Defines trusted applications and processes at the file, path, publisher, or process level for precise control over what runs in your environment.
  • Integrated file-level intelligence: Leverages industry-leading VirusTotal intelligence to understand the context and history of unknown files before making trust decisions.
  • Granular blocklisting: Prevents specific files, tools, and unwanted software from executing using hash, path, and metadata-based criteria such as product name and group context.
  • Offline mode protection: Secure endpoints in air-gapped and other non-internet-connected environments, maintaining continuous protection against threats.
  • Protection for IT and OT: Defend both modern and legacy systems across IT and OT environments.

Take a proactive, prevention-focused approach to ransomware defense. Learn how Airlock Digital prevents malware and ransomware before they execute.