28d67a1360
Port the bash prototype to a structured, testable Python codebase while
preserving the same control loop and the seven detection signatures. The bash
implementation stays in src/ as the regression oracle.
Highlights:
- enodia_sentinel/ package (stdlib only — no runtime deps):
- detectors/ : one pure function per signature, detect(state, cfg)->Alerts
- system.py : SystemState — one cached /proc + ss snapshot per sweep,
fully injectable so detectors are unit-testable
- daemon.py : sweep loop, in-process cooldown dedup, threaded snapshot
capture, and a SUID filesystem scan moved OFF the loop
thread onto a slow background cadence
- snapshot.py: forensic text + JSON sidecar with per-signature IR guidance
- config.py : dataclass config via TOML + env overrides
- netutil.py : public-IP / CIDR logic via stdlib ipaddress
- tests/ : 25 stdlib-unittest cases (no root, no /proc, no ss needed)
- TOML config, launcher wrapper, Makefile (pip-free install), hardened
systemd unit (env-resolved ExecStart), updated PKGBUILD, rewritten README
Performance: per-sweep cost ~200 ms (shared cached state); the multi-second
SUID walk no longer blocks detection. scandir-based walk replaces os.walk.
Verified on Arch: all 7 detectors fire on red-team drills (reverse_shell,
ld_preload, deleted_exe, new_listener, new_suid confirmed live end-to-end),
no false positives on a clean sweep, 25/25 tests pass.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
34 lines
1.1 KiB
Desktop File
34 lines
1.1 KiB
Desktop File
[Unit]
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Description=Enodia Sentinel - host intrusion detection daemon
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After=network.target
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Documentation=https://github.com/Enodia/enodia-sentinel
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[Service]
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Type=simple
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# /usr/bin/env resolves the launcher from PATH, so this works whether it was
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# installed under /usr (package) or /usr/local (make install).
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ExecStart=/usr/bin/env enodia-sentinel run
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Restart=on-failure
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RestartSec=5
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# It only ever READS the system and WRITES to its own log dir. Lock the rest
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# of the surface down: needs root to read every /proc and root-owned files,
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# but with a minimal capability set and no ability to modify the system.
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ProtectSystem=strict
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ReadWritePaths=/var/log/enodia-sentinel
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ProtectHome=read-only
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NoNewPrivileges=yes
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ProtectKernelTunables=yes
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ProtectKernelModules=yes
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ProtectControlGroups=yes
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RestrictSUIDSGID=yes
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MemoryDenyWriteExecute=yes
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LockPersonality=yes
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RestrictNamespaces=yes
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# CAP_SYS_PTRACE: read other processes' /proc; CAP_DAC_READ_SEARCH: read
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# root-owned files (authorized_keys, ld.so.preload) regardless of perms.
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CapabilityBoundingSet=CAP_SYS_PTRACE CAP_DAC_READ_SEARCH
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AmbientCapabilities=CAP_SYS_PTRACE CAP_DAC_READ_SEARCH
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[Install]
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WantedBy=multi-user.target
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