I have the following image
I'm new to solving puzzles and figuring them out, and I have no idea how to approach decryption of this image or how to solve it. I've tried running it on some image decrypting software, but they didn't really find anything. All I have to go off is the fact it's a forensics problem and the hint: you'll know for certain when you've found the flag.
Any help would be very appreciated. Thank you very much!
Edit: for clarification, this picture is found on the Internet. However, this image is bigger than the original image on the Internet. There is something hidden within this or a message. I just can't figure out what it is. THIS particular image has something unique in it that is different from the ones on the Internet.