Knowing the source will help in providing the exact flag or solution steps. Appendix:Australian English military slang - Wiktionary
To check for "hidden" files appended to the end of the image or metadata (like GPS coordinates or comments) that might contain the flag.
Challenges named "cats 1," "cats 2," and "cats 3" often involve layers. You might find a password in the metadata of "cat1.jpg" that unlocks a hidden zip file inside "cat2.png," eventually leading to the final flag in "cats 3.rar." Alternative Context: Australian Military Slang
Searching the binary data of the file for readable text.