'RingReaper' Sneaks Right Past Linux EDRs

RingReaper is a sophisticated post-exploitation Linux implant that leverages the kernel's io_uring asynchronous I/O interface to bypass EDR syscall hooks, perform process and network discovery, collect data, escalate privileges, and self-destruct; Picus Security's analysis indicates this is an advanced evasion technique targeting enterprise and cloud Linux workloads and recommends monitoring io_uring-related syscalls and restricting its use where possible.