yariza's Super Random Guessing

Author:
yariza

Language:
C/C++

Upload:
2021-06-28 23:59

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Platform:
Unix/linux etc.

Difficulty:
2.5

Quality:
4.6

Arch:
x86-64

Downloads:
23

Size:
16.54 KB

Writeups:
3

Comments:
5

Description

If the password is random, no one is gonna be able to crack it! Right? e783a6e4c247b7b2923ace333762bd9a random_guessing_game 03ba10418cd9897ea917e75ca485b7f781823884 random_guessing_game 2cee05acd255fe453fbdaf3f50ceeb74ed1c9e35eb860d62a51306e052d692dd random_guessing_game 91a508b88a7931c712493ac0dde720b82107173ce33ca576c1fc472b5454b356aa9fc9d3ff176b0c3ce37c7efe3703ddc77055a6478361964901fc820bebc7a3 random_guessing_game

Comments (5)
Writeups (3)

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xr@y on 2021-07-11 12:44: I just ended up patching this one. Is there a different way? xray@ubuntu:~/Desktop$ ./random_guessing_game [*] Password: test [*] Checking your password.. [+] Good Job!

yariza on 2021-07-11 12:57: @xr@y Yes, there is another way. Try to understand the assembly code of the program and look for things that are unusual. Hint: To understand this in a better way, take a look at this video by LiveOverflow: https://www.youtube.com/watch?v=qS4VWL5R_OM

xr@y on 2021-07-11 14:50: Thanks for the vid. I actually ended up just using ltrace and watching the calls to rand(). Was able to construct the password from there as well.

ghsi10 on 2021-07-13 22:17: Did you mean that ltrace was used in the challenge to solve it?

ghsi10 on 2021-07-15 08:27: I also solved it by running it twice, is that what you meant?

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Solution by machina on 2021-07-06 14:22:
Includes explanation of disassembly, and script to generate the passwords

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Solution by dev0 on 2021-07-10 00:00:
Write up with C source valid string generator

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Solution by amnam on 2024-04-26 12:35:
Comprehensive solution with an explanation of stack behavior, along with a script for discovering the password.

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crackmes.one

crackmes.one

yariza's Super Random Guessing | Yariza Crackme 3