Defense & IR · medium · solved in-browser (no VM needed) · 3 tiered hints
Write /etc/audit/rules.d/exec.rules to log all program executions. Add a syscall rule -a always,exit for arch=b64 watching the execve syscall (-S execve), keyed (-k) as exec; add the equivalent rule for arch=b32; and make the rule list immutable by ending the file with -e 2. (Authored config, graded structurally — the engine isn't run here.)
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Incident response: evict rogue accounts, eradicate persistence, attribute a breach.
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