Đề bài

Giải
Bài này thì có thể làm theo cách debug cũng được mà chạy file trên 3 hệ điều hành khác nhau cũng được luôn (Windows, Linux, FreeBSD)
Linux
┌──(kali㉿kali)-[/BuckeyeCTF 2025/beginner/Cosmonaut]
└─$ ./ape ./cosmonaut.com
Cosmonauts run their programs everywhere and all at once.
Like on Linux!
bctf{4_7ru3_
Windows
PS D:\BuckeyeCTF 2025\beginner\Cosmonaut> .\cosmonaut.com
Cosmonauts run their programs everywhere and all at once.
Like on Windows!
c05m0p0l174n_c0nn353ur_
FreeBSD
root@:/BuckeyeCTF 2025/beginner/Cosmonaut # ./cosmonaut.com
Cosmonauts run their programs everywhere and all at once.
Like on FreeBSD!
kn0w5_n0_b0und5}
Flag
Flag: bctf{4_7ru3_c05m0p0l174n_c0nn353ur_kn0w5_n0_b0und5}
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