HackPack CTF 2021: BF means best friend, right?

BF means best friend, right?

Category: reverse

50 points

We only got part of Melon Eusk’s program that prints out their password. Looks like it creates the right string in memory but does not print, see if you can figure out what it is (wrap the string in flag{}).

File: main.bf

main.bf

--[----->+<]>----[-<+>]+[--------->++<]>[-<+>]--[----->+<]>-----[-<+>]+[----->+++<]>++[-<+>]+[------->++<]>[-<+>]++[------>+<]>++[-<+>]--[----->+<]>----[-<+>]+[------->++<]>--[-<+>]--[----->+<]>-----[-<+>]+[--------->++<]>+[-<+>]--------[-->+++<]>[-<+>]

Solution

Fortunately, I saw something like this before :-) So I’ve moved right away to brainfuck language decoder page on dcode.fr.

flag

Flag

flag{brain-blast}

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