avatar's catwalk
| Download a.zip, 9 kb (password: crackmes.de) Browse contents of a.zip Run a.exe
Difficulty: 3 - Getting harder | RatingWaiting for at least 3 votes View profile of avatar » |
Solutions
Solution by acruel, published 12. jul, 2016; download (2 kb), password: crackmes.de or browse.
acruel has not rated this crackme yet.
Discussion and comments
| acruel 03. Mar, 17:21 | Kind of weird. Anyway, I got the output. |
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| Extreme Coders 05. Mar, 09:38 | Exploiting buffer overflow. any 10 letter username followed by [alt + numpad 3] any password |
| acruel 05. Mar, 11:49 | @Extreme Coders Not exactly. .text:00402D19 mov ecx, [ebp+var_3C] .text:00402D1C cmp [ebp+var_40], ecx .text:00402D1F jz loc_402DFC |
| avatar Author 05. Mar, 19:50 | @Extreme Coders: what is the [Alt + numpad 3] supposed to produce? I believe it's Ctrl-C (ASCII ETX) which will terminate the program. Your solution does not work for me. |
| Extreme Coders 05. Mar, 20:12 | @avatar: alt + numpad 3 = ♥ Try this: username: 0123456789♥ pass: 123 |
| avatar Author 06. Mar, 01:11 | @Extreme Coders: nice |
| masihamasiha 04. Apr, 10:08 | hi @avatar. I analyzed the code. the user must contain 11 character. the ASCII code for 11th char must be between 0 and 10 excluding 0 and 10 themselves. ---------------------------------------------------------------- here is the logic in code: MOVZX EAX,BYTE PTR DS:[User 11th char] TEST AL,AL JZ 00402DDD MOVZX EAX,BYTE PTR DS:[User 11th char] CMP AL,0A JA 00402DDD MOVZX EAX,BYTE PTR DS:[User 11th char] TEST AL,AL JZ SHORT 00402D19 none of the jumps mus not be taken. ------------------------------------------------------------- I tried the tab key as the 11th character whose ASCII code is 9 and it is working. |
| masihamasiha 04. Apr, 10:10 | I forgot to mention that the password can be everything. |
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