Often a .txt file or a final image.
If images are present, they may contain hidden data. Tools like StegSolve (to check color planes) or steghide (for hidden embedded files) are commonly used. Phase 3: Solving for the Flag File: spookytimes_2-pc.zip ...
If the zip contains nested layers (a zip within a zip), you may need to script a solution to recursively unzip the files until you reach the final payload. Often a