ESPILON-CTF-2026-Writeups/IoT/Nurse_Call/solve/solve.md
Eun0us 6a0877384d [+] Writeups v2 — sync solves, real points, scoreboard stats, cleanup
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2026-03-27 21:27:45 +01:00

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# Nurse Call -- Solution
## Overview
Connect to the maintenance terminal and investigate phantom calls from Room 013.
## Steps
1. Connect: `nc <host> 1337`
2. Read `logs/appels.log` -- notice Room 013 phantom calls, especially the last line:
`payload room 013: 0x4c41494e`
3. Read `logs/reseau.log` -- confirms `0x4c41494e -> ASCII: "LAIN"`
4. Read `logs/maintenance.log` -- technician says to use `reveil.sh --id` with the payload ID
5. Optionally read `config/navi-care.conf` for exact syntax: `reveil.sh --id <MODULE_ID>`
6. Execute: `./tools/reveil.sh --id LAIN`
7. Flag is printed: `ESPILON{r3v31ll3_m01_d4ns_l3_w1r3d}`
## Key insight
The hex payload `0x4c41494e` is ASCII for "LAIN". The player must decode this
and use it as the module identifier with the wake tool.
## Flag
`ESPILON{r3v31ll3_m01_d4ns_l3_w1r3d}`
## Author
Eun0us