[oss] [CTF] Unbreakable contest participation

[Razvan Deaconescu]

Raducanu Constantin <raducanu.costi at gmail.com> writes:
> Hello,
>
> My name is Constantin Raducanu, student at SCPD master and I have
> participated in the Unbreakable CTF contest. I have solved 4 problems and
> here are is a summary of the solutions:
> -> Better-cat: The first exercise of the contest and the easiest one. I
> have obtained the flag by running the command `strings` on the binary.
> -> Tsunami-Researcher: In this case, the flag was hidden in a .wav
> file(Waveform
> Audio File Format). I have opened the .wav file in the Audacity application
> and after playing a little with the settings of the app, I have found the
> flag.
> -> Russian doll: For this challenge a have received an archive, but after
> unzipping it, the content was also an archive. After some more unzipping
> and password cracking (using 7zipcrack), I have found the flag.
> -> The code: This was a web challenge. I have started this challenge by
> running the dirb utility on the url of the webserver. After some
> processing, the utility has found the url: "http://webserserver/flag. I
> have accessed the URL and this way I have found the flag.
>
> My final place was 53/380.

Hi, Costi.

We added a grade 4 bonus in the class register[1].

[1] https://ocw.cs.pub.ro/courses/cns/class-register

Razvan