RingReaper Linux Malware: EDR Evasion Tactics and Technical Analysis

RingReaper is a sophisticated Linux post-exploitation agent that abuses the io_uring asynchronous I/O interface to stealthily perform process, network, and user discovery, local data collection, privilege-escalation checks, and self-deletion. The report maps these behaviors to MITRE ATT&CK techniques (e.g., T1057, T1049, T1033, T1005, T1068, T1564), enumerates observed payload filenames (such as $WORKDIR/cmdMe, executePs, loggedUsers, netstatConnections, fileRead, privescChecker, selfDestruct), and provides detection opportunities and mitigation guidance for EDRs and defenders.