Clear it in 3 steps
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Start the environment
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Investigate the target
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Submit the flag
All challenges
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Programming - PIN Brute Force
Mission
vault.json is generated from the FLAG injected at startup. Brute-force the 0000–9999 PIN SHA-256 and XOR-decrypt with the matching stream to recover the flag.
Hints
Hint 1 Show
Inspect vault.json and identify the target record
Hint 2 Show
brute-force the 0000–9999 PIN SHA-256 and XOR-decrypt with the matching stream
Hint 3 Show
Verify that the reconstructed value has FLAG{...} format