This article details behavioral detection engineering strategies for Linux rootkits, emphasizing the failure of static signatures against trivial binary modifications. It provides actionable detection logic for userland and kernel-space rootkits, including emerging threats leveraging eBPF and io_uring, alongside common persistence and defense evasion techniques.
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Hooked on Linux: Rootkit Detection Engineering Hooked on Linux: Rootkit Taxonomy, Hooking Techniques and Tradecraft This report details the taxonomy, evolution, and hooking techniques of Linux rootkits. It highlights the shift from userland and LKM-based rootkits to advanced evasive techniques leveraging eBPF and io_uring, which challenge traditional EDR visibility and kernel hardening measures.