Project Sekai - ✅-reverse-dark

dark_dimension - 500 points

Category: Reverse Description: > After destroying the earth, Dormammu "the ruler of the dark dimension" left only one magic spell that could restore the earth to its original form, and it was hidden in a binary file, and according to the book of the Vishanti, only Dr.Strange can find and use the spell.

Can you help Dr. Strange get the code in order to unlock the spell?

Author : yalatr3ch3 Files:

https://ctf.gdgalgiers.com/files/327f900e711440dd23cb4f61f9d72827/dark_dimension.exe?token=eyJ1c2VyX2lkIjo0MzksInRlYW1faWQiOjE3NSwiZmlsZV9pZCI6Nzl9.Y0E8UA.azelcAvK6QEYqC55S2cOP27F_Mo

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Sutx pinned a message to this channel. 10/08/2022 2:01 AM

@Violin wants to collaborate

02:08

@crazyman ai wants to collaborate

@TheBadGod wants to collaborate

dart?

yes, i have no idea

04:55

seems to be aot compiled

04:55

the main elf then loads the embedded stuff into memory

04:55

this stuff

out.elf

724 KB

04:56

but the references are probably off, because of the way dart aot works (there's a string pool and it somehow loads from that)

04:57

because else we could just look where the "Give me your code" and the "correct! here is your Flag:" strings are used and reverse that part

@joezid wants to collaborate

@joezid

06:58

:d

Hello

1

hmm dart

somehow i couldnt find any related ctf challs on dart rev, bot is stuck too

i think i found the "main" method

08:45

    *(_QWORD *)(v54 + 23) = 12LL;
    *(_QWORD *)(v54 + 31) = 120LL;
    *(_QWORD *)(v54 + 39) = 78LL;
    *(_QWORD *)(v54 + 47) = 64LL;
    *(_QWORD *)(v54 + 55) = 110LL;
    *(_QWORD *)(v54 + 63) = 0LL;
    *(_QWORD *)(v54 + 71) = 110LL;
    *(_QWORD *)(v54 + 79) = 96LL;
    *(_QWORD *)(v54 + 87) = 66LL;
    *(_QWORD *)(v54 + 95) = 88LL;
    *(_QWORD *)(v54 + 103) = 98LL;
    *(_QWORD *)(v54 + 111) = 64LL;
    *(_QWORD *)(v54 + 119) = 108LL;
    *(_QWORD *)(v54 + 127) = 124LL;
    *(_QWORD *)(v54 + 135) = 8LL;
    *(_QWORD *)(v54 + 143) = 52LL;
    *(_QWORD *)(v54 + 151) = 100LL;
    *(_QWORD *)(v54 + 159) = 232LL;
    *(_QWORD *)(v54 + 167) = 194LL;
    *(_QWORD *)(v54 + 175) = 0LL;
    *(_QWORD *)(v54 + 183) = 52LL;
    *(_QWORD *)(v54 + 191) = 16LL;
    *(_QWORD *)(v54 + 199) = 226LL;
    *(_QWORD *)(v54 + 207) = 22LL;
    *(_QWORD *)(v54 + 215) = 52LL;
    *(_QWORD *)(v54 + 223) = 234LL;
    *(_QWORD *)(v54 + 231) = 22LL;
    *(_QWORD *)(v54 + 239) = 76LL;
    *(_QWORD *)(v54 + 247) = 64LL;
    *(_QWORD *)(v54 + 255) = 52LL;
    *(_QWORD *)(v54 + 263) = 194LL;
    *(_QWORD *)(v54 + 271) = 8LL;
    *(_QWORD *)(v54 + 279) = 232LL;
    *(_QWORD *)(v54 + 287) = 2LL;
    *(_QWORD *)(v54 + 295) = 52LL;
    *(_QWORD *)(v54 + 303) = 98LL;
    *(_QWORD *)(v54 + 311) = 232LL;
    *(_QWORD *)(v54 + 319) = 16LL;
    *(_QWORD *)(v54 + 327) = 64LL;
    *(_QWORD *)(v54 + 335) = 52LL;
    *(_QWORD *)(v54 + 343) = 24LL;
    *(_QWORD *)(v54 + 351) = 108LL;
    *(_QWORD *)(v54 + 359) = 52LL;
    *(_QWORD *)(v54 + 367) = 6LL;
    *(_QWORD *)(v54 + 375) = 82LL;
    *(_QWORD *)(v54 + 383) = 226LL;
    *(_QWORD *)(v54 + 391) = 68LL;
    *(_QWORD *)(v54 + 399) = 112LL;

08:49

CyberErudites{A_w1$E_M4N_0Nce_$A1D_t1Me_Is_Fl4g}

TheBadGod

used /ctf solve

✅ Challenge solved.