Don’t you love challenge with README ? We need your help, soldier! Your goal today is to help us obtain the access to Oscaderp Corp mainframe. Our intelligence has managed to install a keylogger and a formgrabber on some bad person’s work laptop. You don’t need his name to do […]
In this challenge we get a Win32 console binary which just display garbage when started. Reversing it with IDA, we see it connects to a TCP server. I had noticed previously that the file being transfered in the Epic Arc 200 challenge was an Erlang BEAM file (compiled erlang) This […]
Web challenge. We have the “source code” and we know the location of the flag: <!– can’t touch this: http://securerng.misteryou.ru/flag.txt.gz –> <!– can touch this: http://securerng.misteryou.ru/index.php.txt –> The web page is simple form to generate pseudo-random numbers. Here is the form: <form method=’POST’> Enter the […]
In this challenge we need to guess the secret key used by an encryption service running over UDP. We get the source of the server-side. The encryption algorithm uses a Sbox that is initialized with sequential numbers from 1 to 128: SALTED_SBOX = list(range(128)) Then the secret key is mixed […]