List your toolkit, such as ExifTool , FFmpeg , StegSolve , Sonic Visualizer , or Strings . 2. Initial Analysis Describe your first steps after receiving the file:
Use file 3137.mp4 to confirm it is actually an MP4 and not a renamed archive or polyglot file. 3137.mp4
If the video looked normal, did you check the audio track? Mention if you used Audacity or Sonic Visualizer to look at the Spectrogram for hidden text. List your toolkit, such as ExifTool , FFmpeg
Briefly state what the goal was (e.g., "Find the hidden flag within the video file"). List your toolkit
Did you watch the video for flashing frames, QR codes, or Morse code? 3. Deep Dive & Exploitation