After a hacking attack, we have fetched some suspicious e-mails sent from within Senork Vertriebs GmbH to an unknown recipient. It has an attachment and says, "Hi, I managed to capture a screenshot. I am sure there is something useful for us in there, even if it's not that significant. Good luck". What could that be?
The following image is provided:
Nothing in the image content itself was interesting. Opening the image in StegSolve, we can see that there are a few interesting bits on certain planes:
Based on the clues provided, this is probably least significant bit steganography.
In the second image above representing the Green plane 0, there's a vertical line of pixels, which is probably where our flag is.
In StegSolve's Data Extract feature, setting the bit plane mentioned above and copying the data out to a text editor reveals the flag:
