congtrung2k1: Flare-On 2019

Sunday, 15 September 2019

Challenge 1

Defend against 2 cat by find weapon

Open with dnSpy

Round 1

Answer: RAINBOW

Round 2

This function will check if your input is correct

So, we will take into function “isValidWeaponCode”

As u can see, this function change our input to array and made each element xor with ‘A’.

And if array is equal with < char[] {‘\u0003’, ‘ ’, ‘&’, ‘$’, ‘-’, ‘\u001e’, ‘\u0002’, ‘ ’, ‘/’, ‘/’, ‘.’, ‘/’} > , than we are correct.

So, our mission is reverse the answer: < char[] >

Answer: Bagel_Cannon

Final, flag: Kitteh_save_galixy@flare-on.com

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