Some advanced Linux malware delivered via RAR files uses modern interfaces like io_uring to evade standard security monitoring tools. Assembling resource adapter (connector) modules - IBM

A RAR file (Roshal Archive) is a proprietary format used for high-ratio data compression and error correction.

It reduces the size of large files or groups of files for easier storage and transfer.

Compressed archives like RAR files are frequently used in cyberattacks to deliver malicious content because they can bypass some simple email filters.