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LoadSomeBits

Forensics - 550 points

Challenge

Can you find the flag encoded inside this image? You can also find the file in /problems/loadsomebits_3_8933ebe9085168b1e0bbb07884c2231f on the shell server.

pico2018-special-logo.bmp

Hint

Look through the Least Significant Bits for the image If you interpret a binary sequence (seq) as ascii and then try interpreting the same binary sequence from an offset of 1 (seq[1:]) as ascii do you get something similar or completely different?

Solution

Hint is very direct, and it also reminds me of last year's challenge...

Using the exact same script courtesy of@LFlare from PicoCTF 2017: Little School Bus, we get the flag.

Flag

picoCTF{st0r3d_iN_tH3_l345t_s1gn1f1c4nT_b1t5_449088860}