webPromedium

Rickroll

alfactf

Task: Rickroll Detector game with 50 shortened links, need 20+ coins to win. Solution: Exploited predictable RNG seed (time in milliseconds) by bruteforcing seeds to predict which links are safe vs rickroll.

$ ls tags/ techniques/
game_hackingfastapipythonrngrandom_seedtime_based_seedprediction
predictable_rng_attackseed_bruteforcegame_state_prediction
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