RatCTF
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Vault PKI

🧩 Cryptovault

🖧 AD Network — Cryptovault

Vault Keygen Vault Session Vault Verify Vault Encrypt Vault PKI

512-bit RSA public key served at /pubkey. Factor the modulus using msieve or yafu (feasible under a minute for 512-bit), reconstruct the private key, and decrypt the /challenge ciphertext for SSH credentials. World-writable cron gives root.

🩸 First user blood: 00x003 🩸 First root blood: 00x003
Part of the Cryptovault set — it is not listed on the main challenges page, but its ports are open to you. Connect straight to the target IP and ports below; no pivot needed.
Target IP Log in to reveal
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Community

Community Hints

Grade A · 1000 pts Grade B · 700 pts Grade C · 400 pts Grade D · 200 pts + 150 credits on accept

Short, stage-specific nudges — directional, spoiler-light, no exact commands.

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Community

Community Walkthroughs

Grade A · 2500 pts Grade B · 1750 pts Grade C · 1000 pts Grade D · 500 pts + 300 credits on accept

🔒 Walkthroughs are spoilers — capture the root flag on this machine to unlock them for free.