Storage Node Agent for Ransomware Detection and Data Protection

The system performs preliminary actions by creating snapshots of data before ransomware encryption occurs. The snapshot manager proactively captures data states at predetermined intervals and stores them in a separate location, ensuring that original data can be recovered even if encrypted by ransomware. This preliminary snapshot creation prevents the contradiction by establishing data backups before the harmful encryption process begins.

The snapshot manager acts as an intermediary between the storage system and ransomware attacks. It intercepts write operations and selectively prevents them from reaching stored data by comparing file hashes against known ransomware patterns. This intermediary layer protects snapshots from being overwritten or deleted by ransomware, resolving the contradiction between maintaining data security and preserving snapshot integrity.

The system applies local quality by treating protected data and regular data differently. Snapshots of files identified as valuable or at risk are preserved with higher priority and stored in a protected location, while other snapshots follow the standard recycling policy. This selective preservation maintains storage efficiency while ensuring critical original data snapshots are retained even when the overall snapshot count exceeds limits.

The snapshot manager serves as an intermediary that intercepts the snapshot deletion process. When snapshots are scheduled for deletion due to space constraints, the intermediary checks whether they contain original unencrypted data and prevents their deletion if they do. This resolves the contradiction by maintaining storage space optimization while protecting essential original data snapshots from being lost.

The system replaces traditional mechanical detection methods with hash-based pattern recognition. Instead of monitoring system performance or user reports, the snapshot manager continuously compares file hashes against a database of known ransomware hashes. This substitution enables immediate detection of ransomware activity regardless of how slowly it executes, eliminating the delay between ransomware execution and detection that occurs with conventional methods.

The hash comparison process operates continuously without interruption, providing constant monitoring of data changes. This continuous action ensures that ransomware is detected as soon as it begins encrypting files, even if it runs slowly over extended periods. The uninterrupted monitoring prevents the time loss that occurs when detection only happens at scheduled intervals or through reactive user reporting.

The protection agent applies partial action by intercepting and analyzing only those write requests that are likely to be malicious. It uses file path patterns, user behavior context, and hash comparisons to identify suspicious writes, allowing normal write operations to proceed without full analysis. This selective approach maintains high malware detection accuracy while minimizing the performance overhead associated with analyzing every write request.

The system replaces comprehensive real-time analysis of all write requests with a two-stage approach: first, quick hash comparison against known ransomware patterns, and second, more detailed analysis only for suspicious files. This substitution of the detection mechanism reduces the computational burden on the system while maintaining high detection accuracy, thereby improving productivity without sacrificing security.