Sebastian's Blog

software developer. security enthusiast.

HACKVent 2019

HV19.07 Santa Rider

Sebastian

Santa is prototyping a new gadget for his sledge. Unfortunately it still has some glitches, but look for yourself.

Challenge Description
Challenge Video

This was very easy, we got 8 LEDs, so 8 bit = 1 byte. Looks like ASCII. I split the video into frames using ffmpeg to go through the pictures by hand while noting the byte values.

01001000 01010110 00110001 00111001 01111011 00110001 01101101 01011111 01100001 01101100 01110011 00110000 01011111 01110111 00110000 01110010 01101011 00110001 01101110 01100111 01011111 00110000 01101110 01011111 01100001 01011111 01110010 00110011 01101101 00110000 01110100 00110011 01011111 01100011 00110000 01101110 01110100 01110010 00110000 01101100 01111101

Converting this to ASCII reveals the flag: HV19{1m_als0_w0rk1ng_0n_a_r3m0t3_c0ntr0l}.

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