Project Sekai - ✅-rev-but-like-when

But Like When - 500 points

Category: Rev Description: But like fr... when? Author: Kkevsterrr Files:

https://umdctf.io/files/1dc223f65bb08d1b8a33250279883f1a/butlikewhen?token=eyJ1c2VyX2lkIjoxNDcsInRlYW1faWQiOjY4LCJmaWxlX2lkIjoyM30.ZExCBA.vchD9VfAn2y0fmHSwuOqn096E4o

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Sutx pinned a message to this channel. 04/28/2023 3:00 PM

@Violin wants to collaborate

@Legoclones wants to collaborate

Another Mach-o binary

tbg time

@Iyed wants to collaborate

@fleming wants to collaborate

@TheBadGod wants to collaborate

TheBadGod

used /ctf solve

✅ Challenge solved.

UMDCTF{dictionary_time_travel_extremely_crazy}

05:35

from pwn import *
from hashlib import md5

a = open("./butlikewhen","rb").read()

flag_arr = []
for i in range(9999):
    ptr = u64(a[0x1dbec0+16*i:][:8])
    length = u64(a[0x1dbec0+16*i:][8:16])
    ptr -= 0x100000000

    flag_arr.append(a[ptr:ptr+length])

for i, flag in enumerate(flag_arr):
    if (md5(flag).hexdigest() == "73feffa4b7f6bb68e44cf984c85f6e88") or i == 2031:
        print(flag)
        exit(1)

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