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mus1c

  • Description: I wrote you a song. Put it in the picoCTF{} flag format.
  • Difficulty: Medium

🔎 Solution​

This challenge introduces the Rockstar programming language, which was first encountered in the earlier task 1_wanna_b3_a_r0ck5tar.

The approach here is slightly different because the challenge uses a newer version of Rockstar, meaning we don't need to install the rockstar-py tool for code conversion.

Instead, we can use the official Rockstar online interpreter, which produces an output in decimal numbers.

114
114
114
111
99
107
110
114
110
48
49
49
51
114

Converting these decimal values into ASCII characters reveals the string rrrocknrn0113r, which is the flag.

🚩Flag​

picoCTF{rrrocknrn0113r}