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Use a hex editor like HxD or xxd to look for multiple headers (e.g., finding a PNG header 89 50 4E 47 inside the JPG). 3. Steganographic Decoding

Many challenges hide entire files (like .zip , .txt , or .png ) inside a host image. 5431023_030.jpg

While specific flag details vary by the event (e.g., PicoCTF, Zh3r0, or PatriotCTF), a full write-up for this type of challenge generally follows these standard investigative steps: 1. Initial File Analysis Use a hex editor like HxD or xxd

Run the strings command to extract human-readable text. Grep for common flag formats like flag{ , CTF{ , or picoCTF{ . 2. Embedded Content Extraction 5431023_030.jpg

Run binwalk -e 5431023_030.jpg to scan for and automatically extract any hidden file signatures.