Description
You received a message from your internet provider saying you are accused of breaking DRM. But you have never shared any files illegally. You live alone with a cat and you would swear you saw it fiddling with a radio in its box. So you decide to make recordings inside your appartment.
Additionally, you search through its belongings and find an intriguing document.
In this challenge, the signals are in float32 format with a 16,000 sample rate.
Note: this challenge has been designed for the “Compete With Team Europe” CTF, as part of ECSC Team France 2025 training.
Files
- docker-compose.yml
-
client.py
1.83 KiB – 3d22071dfb7635b50dbda53bf9a2795c843f3f0146961a18d06d6305aad8485d -
hint.png
1.15 MiB – 50e951db76f9f0d5f945bdd55ed103a5467d300364dddf3a605721ececdd2ee5 -
sample-0.f32
284.86 KiB – baed0efaf514cddaf9b60f17e3bae0f44becdfe3bef35708d042f0f79dbd88b4 -
sample-1.f32
409.38 KiB – 41ea2d211e0d0c3c8aab2ead04ef571cf4aa9cd73f912785c688a0e39c23a628 -
sample-2.f32
762.59 KiB – d383538bf58888f8997d14f1d971017c1303c735c2a743b05e9c80f267617dc6
Authors
Challenge Instructions
- First, download docker-compose.yml:
curl https://hackropole.fr/challenges/cte2025-hardware-uwuspy/docker-compose.public.yml -o docker-compose.yml - Launch the challenge by executing in the same folder:
docker compose up - Then, in another console, access the challenge with Netcat:
nc localhost 4000
In case you encounter problems, please consult the FAQ.
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Writeups
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