What is the primary purpose of YARA rules in malware analysis?

• A. To execute malware in a sandbox.
• B. To detect and classify malware by matching patterns such as strings, byte sequences, and file metadata to known signatures.
• C. To compress malware samples.
• D. To manage user access to files.

Answer: (B)

Pattern-based detection and classification of malware by matching patterns such as strings, byte sequences, and file metadata. YARA rules describe sets of indicators (strings, hex patterns, metadata) and use logical conditions to decide if a file or memory region matches known threats. This enables analysts to quickly identify and group malware families or variants across large repositories or images. They’re not about executing code, compressing data, or managing access; they’re a flexible detector that flags and categorizes samples based on recognizable artifacts like specific strings, compiler or packer markers, and distinctive byte sequences.