How to Build Resilience and Protect Against Ransomware: 6 Best Practices
If you’re looking for effective ways to guard against ransomware, take a cue from the world’s top cloud providers. For example, platforms such as Oracle Cloud Infrastructure (OCI) are built to help resist these threats by combining strong layered security, automation, AI, resilience techniques, and continuous monitoring.
Here are six key strategies to boost your resilience.
1. Use AI and automation: Ransomware attacks are only becoming more sophisticated and targeted. That’s why organizations are turning to automation and AI to keep pace. Unlike many traditional security tools, AI-driven systems use advanced machine learning algorithms to detect unusual patterns or anomalies that might indicate a ransomware attack, such as rapid file encryption or suspicious file modifications or network connections. Automating threat detection can help front-line security teams respond faster and head off problems, freeing up time to focus on strategic initiatives and threat investigations. AI’s ability to both monitor and analyze massive volumes of network and endpoint data in real time is invaluable.
AI-powered security solutions can help IT teams
- Quickly correlate events from many sources, including emails, endpoints, cloud providers, and network traffic, providing a clear picture of what’s happening.
- Keep up with new threats by analyzing emerging intelligence and automatically adjusting their detection logic.
- Launch automated responses to isolate infected systems, block suspicious activity, and restore compromised files from secure backups.
2. Emphasize strong access controls and least privilege: Not everyone in an organization needs access to everything. Following the least privilege principle—giving users and services only the access necessary to perform their roles or functions, and only for the time required—makes it harder for attackers to cause damage, even if they steal credentials. Identity and access management (IAM) systems help enforce least privilege by allowing organizations to assign highly specific permissions for resources, operations, or data as opposed to relying on broader role-based access controls.
Time-limited access and mandatory multifactor authentication (MFA) add extra layers of protection. Temporary credentials reduce the time a compromised login remains useful to attackers, so they can’t prowl around the network looking for valuable data. With MFA, users must verify their identities in more than one way—for example, a password and a physical token or biometric factor—before gaining access to sensitive data.
3. Embrace zero trust security: The zero trust security model ties the above elements together by assuming no implicit trust in users, devices, or network segments—regardless of their location inside or outside the corporate perimeter. Every request for access is continuously verified based on user identity, device health, context, and behavior. Access policies are dynamic and enforce least privilege by default, using automation to adjust in real time, and there are continuous authentication/authorization checks. Other key pillars of zero trust include microsegmented networks and default-deny policies. Microsegmentation divides networks into smaller zones with the goal of limiting lateral movement, so if an attacker breaches one segment, access to others is restricted. Each segment is protected by its own access controls and monitoring. Default-deny policies, meanwhile, block all inbound traffic unless it’s explicitly allowed, reducing the number of entry points an attacker could exploit. Taken together, these measures help enforce strict boundaries, minimize risk, and help provide continuous verification of identities and devices.
4. Provide immutability and versioning with automated backups: Ransomware protection isn’t just about keeping the bad guys out. It’s also about recovering quickly if anything goes wrong. Immutability and versioning protect backups so they can’t be changed or deleted, even if an administrator account is compromised. Immutability means that once data is saved, it can’t be changed for a set period. That’s typically done through write-once, read-many (WORM) storage, which is designed to prevent tampering by users, applications, or even privileged administrators. Regularly automated snapshots and versioning add more protection by making it easy to “rewind” files, databases, or storage objects to pre-attack versions.
Cloud providers let you set policies that enforce immutability and maintain previous versions automatically. Now, even if an attacker tries to overwrite or delete data, unaltered versions remain accessible, saving the expense and risk of paying a ransom.
5. Use centralized logging: When responding to an attack, knowing what happened, when, and to which data is critical. Centralized logging brings together event logs from endpoints, servers, applications, and cloud environments, helping security teams quickly spot suspicious activity, including failed login attempts, unusual file access, or unauthorized processes. A security information and event management (SIEM) system makes that even easier by providing a consolidated view of security events across the network. SIEM tools collect and analyze these logs, flagging suspicious activity and helping prioritize responses. Think of it like a command center that helps identify and address potential threats in real time.
6. Run drills for an effective and fast response: Limiting damage is all about having a plan of action. Regularly running simulated ransomware attack drills helps prepare employees for real attacks, expose gaps or weak spots in plans so they can be addressed ahead of time, and make sure everyone understands their roles during an emergency.
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