crackmes.one

totothetoro's alien_bin

Author:
totothetoro

Language:
C/C++

Upload:
9:32 PM 09/10/2019

Level:
2

Platform
Unix/linux etc.

Description

In the ruins of an ancient alien civilization a micro sd card was found with this binary inside. It's asking us to feed it a password, but we don't know where to get it from! We've tried all of our birthdays right way and backwards here at the lab, but nothing seems to work :( Maybe we missed something.

SYS_V on 9:41 AM 09/29/2019: It would be more appropriate to say this is a level 1 crackme, not level 2.

rootabeta on 12:13 AM 10/20/2019: Very easy - I agree with @SYS_V in that it feels more like a level one. I was able to crack this just by running ltrace.

adalovegirls on 3:54 AM 10/30/2019: Love the flavor text! It's cute :)

logerse on 6:01 AM 11/06/2019: Hey! I don't understand how it program works. May you send source-code on email?

ski on 6:58 PM 11/12/2019: nice one. solved it using ltrace.but using IDA pro one needs to understand the control flow

cipherhater on 11:40 AM 11/14/2019: Hi, $ ./alien_bin Feed me the right password: 435345345345345 blip blop :) $ ./alien_bin Feed me the right password: 000000000000 blip blop :) --- @@ -1652,7 +1652,8 @@ 2276: 48 89 c7 mov %rax,%rdi 2279: e8 e2 fd ff ff callq 2060 (0x2060) 227e: 85 c0 test %eax,%eax - 2280: 75 0c jne 228e (0x228e) + 2280: 90 nop + 2281: 90 nop 2282: b8 00 00 00 00 mov $0x0,%eax 2287: e8 29 00 00 00 callq 22b5 (0x22b5) 228c: eb 0c jmp 229a (0x229a) --- ))) Best regards