ESPILON CTF 2026 — Write-ups officiels

Édition 1 · Thème : Serial Experiments Lain × Sécurité industrielle & embarquée

Write-ups de l'ensemble des challenges de la première édition ESPILON CTF. Les catégories couvrent le matériel bas niveau, l'IoT, les systèmes OT/SCADA, l'ESP32 et les smart contracts EVM.

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Challenges

🟢 Intro

Challenge	Difficulté	Flag
The Wired	Easy	ESPILON{th3_w1r3d_kn0ws_wh0_y0u_4r3}

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📡 ESP

Challenge	Difficulté	Flag
ESP Start	Easy	ESPILON{st4rt_th3_w1r3}
Phantom Byte	Medium	ESPILON{bl1nd_str4ddl3}
Jnouner Router	Hard	4 flags (voir WU)

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🔌 Hardware

Challenge	Difficulté	Flag
Serial Experimental 00	Easy	dynamique
Signal Tap Lain	Medium-Hard	ESPILON{s1gn4l_t4p_l41n}
NAVI I2C Sniff	Medium-Hard	dynamique
Phantom JTAG	Medium-Hard	dynamique
Wired SPI Exfil	Medium-Hard	dynamique
CAN Bus Implant	Medium-Hard	dynamique
Glitch The Wired	Medium-Hard	dynamique

Les challenges Hardware sont des containers Docker avec des flags dynamiques générés par instance.

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📶 IoT

Challenge	Difficulté	Flag
Nurse Call	Easy	ESPILON{r3v31ll3_m01_d4ns_l3_w1r3d}
Lets All Love UART	Easy	ESPILON{LAIN_TrUsT_U4RT}
Wired Airwave 013	Medium	ESPILON{sdr_fsk_w1r3d_m3d_013}
LAIN Breakcore	Medium	ECW{LAIN_Br34k_CryPT0}
Anesthesia Gateway	Medium-Hard	ESPILON{mQtt_g4tw4y_4n3sth3s14}
Observe The Wired	Medium-Hard	ESPILON{c0ap_0bs3rv3_th3_w1r3d}
Lets All Hate UART	Medium-Hard	ESPILON{u4rt_nvs_fl4sh_d1sc0v3ry}
LAIN_Br34kC0r3 V2	Hard	ESPILON{3sp32_fl4sh_dump_r3v3rs3d}
LAIN vs Knights	Hard	ESPILON{0nlY_L41N_C4N_S0lv3}
Cr4cK_w1f1	Medium	(challenge en cours)

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🏭 OT / SCADA

Challenge	Difficulté	Flag
Schumann Resonance	Medium	ESPILON{sch0m4nn_r3s0n4nc3_783}
Operating Room	Medium-Hard	ESPILON{m0dbu5_0p3r4t1ng_r00m}
Cyberia Grid	Medium-Hard	ESPILON{cyb3r14_ps7ch3_pr0c3ss0r}
Tachibana SCADA	Medium-Hard	ESPILON{31r1_k1ds_pr0t0c0l_s3v3n}
Protocol Seven	Hard	ESPILON{pr0t0c0l_7_m3rg3_c0mpl3t3}

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🔮 Misc

Challenge	Difficulté	Flag
Patient Portal	Medium-Hard	ESPILON{r00t_0f_s41nt3_m1k4}
Accela Signal	Hard	ESPILON{4cc3l4_ch1rp_spr34d_w1r3d}
LAYER_ZERO	Hard	ESPILON{kn1ghts_0f_th3_w1r3d_pr0t0c0l7}
AETHER_NET	Insane	ESPILON{4eth3r_n3t_d3us_4dm1n}
Last Train 451	TBD	(challenge en cours)

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⛓️ Web3 / EVM

Challenge	Difficulté	Flag
GANTZ BALL CONTRACT	Insane	ESPILON{g4ntz_b4ll_100_p01nts_fr33d0m}
TACHIBANA FIRMWARE REGISTRY	Insane	ESPILON{t4ch1b4n4_fuzz_f1rmw4r3_r3g1stry}

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Système de scoring

Difficulté	Initial	Minimum	Decay (solves)
Easy	250	50	100
Medium	400	80	80
Medium-Hard	500	100	60
Hard	600	150	50
Insane	600+	150	50

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Auteur

Eun0us — ESPILON CTF 2026