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circo | HackNow
All CTF challenges
Reading Mode
Hard
Reverse Engineering
circo
26 Apr 2026
Points
+400
Statistics
1
Solutions
400
Points
Author
Neo Yamaguchi
First Blood
matrix_mx
24 Jul 2026
Description
lock
UZ only
Web Lab
Launch the lab to solve this challenge. The virtual environment stays active for 1 hour.
Launch lab
Attachments
demo.ipynb
Download
docker/main.final
Download
docker/README.md
Download
circo-sdk/main.final
Download
circo-sdk/gen_config.sh
Download
circo-sdk/signer
Download
circo-sdk/signed_counter.prg
Download
circo-sdk/signed_gol.prg
Download
circo-sdk/README.md
Download
circo-sdk/counter/program.json
Download
circo-sdk/counter/program.bin
Download
circo-sdk/counter/program.jq
Download
circo-sdk/counter/header.asm
Download
circo-sdk/counter/docs.pdf
Download
circo-sdk/counter/Makefile
Download
circo-sdk/counter/program.ys
Download
circo-sdk/counter/program.bin.asm
Download
circo-sdk/counter/program.sv
Download
circo-sdk/identity/program.bin
Download
circo-sdk/identity/Makefile
Download
circo-sdk/identity/program.bin.asm
Download
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