stegomedium

Writeup

hackerlab

Task: a text file with visible Russian text hides invisible zero-width Unicode characters (U+200B and U+2063) between lines. Solution: extract the two types of zero-width characters, interpret them as Morse code dashes and dots respectively, decode each line to get CODEBY{z3r0w1dth}.

$ ls tags/ techniques/

zwsp text_steganography unicode_steganography morse_code invisible_characters zero_width_characters u200b u2063

zero_width_unicode_extractionmorse_code_binary_decodinghex_dump_invisible_character_detection

Analysis

Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.

$ python3 exploit.py --target 192.168.1.1 --port 8080
[*] Connecting to target...
[+] Shell obtained!

Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.

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