Profile

crackmes.one

destructeur's profile

Number of crackmes:

13

Number of writeups:

0

Comments:

11

Crackmes
Writeups
Comments

Crackmes

Name	Author	Language	Arch	Difficulty	Quality	Platform	Date	Downloads	Writeups	Comments
ShAPK1	destructeur	Java	other	2.0	4.2	Unix/linux etc.	2020-06-17 20:46	48	3	6
Sh4ll10.1	destructeur	C/C++	x86-64	2.5	4.0	Unix/linux etc.	2020-02-20 17:22	50	4	11
Sh4ll11	destructeur	C/C++	x86-64	3.0	4.0	Unix/linux etc.	2019-08-07 20:37	43	0	2
Sh4ll10	destructeur	C/C++	x86-64	1.5	4.5	Unix/linux etc.	2019-05-05 19:39	56	10	18
Sh4ll9	destructeur	C/C++	x86-64	3.0	4.0	Unix/linux etc.	2019-03-01 17:57	50	1	8
Sh4ll8	destructeur	C/C++	x86-64	3.0	4.0	Unix/linux etc.	2018-07-19 10:44	54	2	3
Sh4ll7	destructeur	C/C++	x86-64	3.0	4.0	Unix/linux etc.	2018-07-02 16:26	37	3	2
Sh4ll6	destructeur	C/C++	x86	3.0	4.0	Unix/linux etc.	2018-06-17 20:33	42	1	3
Sh4ll5	destructeur	C/C++	x86-64	2.0	4.0	Unix/linux etc.	2018-06-03 15:05	46	2	0
Sh4ll4	destructeur	C/C++	x86-64	2.0	4.0	Unix/linux etc.	2018-05-27 20:42	46	4	3
Sh4ll3	destructeur	C/C++	x86-64	3.0	4.0	Unix/linux etc.	2018-05-06 21:42	45	4	1
Sh4ll2	destructeur	C/C++	x86-64	2.0	4.0	Unix/linux etc.	2018-05-06 17:16	56	4	1
Sh4ll1	destructeur	C/C++	x86-64	1.2	4.5	Unix/linux etc.	2018-05-06 17:13	55	21	12

Comments

Crackme	Comment	Date
Sh4ll1	Good job mois_Hamappleman, there are nine crackmes left ;) [spoiler] The idea of the crackme comes from the section 1.9.4 "Noise in the stack" of the book "Reverse engineering for beginners", take a look at https://beginners.re So if you validated the crackme without understanding the principle behind it, I advise you to read the book. [/spoiler]	2020-03-13 12:04
Sh4ll10	@ker2x: Can you identify the arguments of the function scanf (the buffer, and the specifier used http://www.cplusplus.com/reference/cstdio/scanf/)? If so, you will have to read instruction by instruction to understand what is going on and how the program use your input. I can't really help you to read assembly instructions but there are many documentations on the Internet. If after a while, you can't still understand what is going on, don't stay stuck and use a debugger.	2019-06-25 09:25
Sh4ll10	@ker2x: Try to look at the arguments of the function scanf, think about what you can write in the input to print the good boy.	2019-06-23 18:10
Sh4ll10	Good job Bilbin, but the goal is not to find a XSS on the comment section.	2019-06-15 10:13
Sh4ll10	No problem, Good job!	2019-05-23 19:32
Sh4ll10	I did 's' (0x73) ^ 0x03 on purpose to throw you off so that if you read badly the routine, you could think that the scanf take the parameter '%s'. I don't know if it was your case. I usually don't upload the source code but it can be a good idea for my next crackmes.	2019-05-23 19:21
Sh4ll10	Yes, the goal is to fix the segfault by submitting the good string. You don't need any patching or debugging for this one. You just need to read the main function to understand the Crackme. Good luck	2019-05-22 11:45
Sh4ll9	Well played thotbox! I'm waiting for your solution :)	2019-03-06 22:36
Sh4ll6	Good job Mercurio. This is really cool way to crack it.	2018-08-27 14:59
Sh4ll8	Well played s4r! That was an unexpected bug, I'm pretty bummed out of that... I will also have to improve my anti-debug techniques.	2018-07-27 15:43
Sh4ll1	travisjayday You should read the FAQ. The password is "crackmes.one"	2018-07-09 12:54