If the contents contain images (like .png or .jpg ), check for hidden data using tools like or ExifTool . Check Metadata : exiftool image.jpg
: Open the image in StegSolve and cycle through the color planes to see if text appears. Key Tools Used 7-Zip : For archive extraction. File/Strings : For basic Linux-based identification.
If the extracted file appears to be an image or a binary, use strings and grep to look for the flag format (e.g., CTF... ). : strings [filename] | grep "CTF" 3tebo.7z
Once extracted, you will likely find a file with no extension or a misleading one. Use the file command to determine its true nature. : Run file [extracted_filename] .
: It may be identified as a disk image , a pcap (network capture), or another compressed layer . 3. Deep Forensic Analysis If the contents contain images (like
: Check if it prompts for a password. If no password is provided in the challenge description, try common CTF passwords like password , admin , or the name of the challenge itself. 2. File Identification
: Extract the archive to find a hidden flag or further nested files. Step-by-Step Walkthrough 1. Initial Extraction File/Strings : For basic Linux-based identification
: To check if multiple files are concatenated together ( binwalk -e 3tebo ).