$ wget https://github.com/syvaidya/openstego/releases/download/openstego-0.8.6/openstego-0.8.6.zip
$ sha256sum openstego-0.8.6.zip 
402ba4190d329564996a1250b9096f0402452042469f517545c312527cedc41f  openstego-0.8.6.zip
$ unzip openstego-0.8.6.zip
$ cd openstego-0.8.6/
$ wget https://i.ibb.co/gMmj1r3c/output-compressed.png
$ sha256sum output-compressed.png 
640ec3f9068a3da232ecd5114e5eaae14b0ed333f17b25486e071f80bd3ef8f1  output-compressed.png
$ chmod u+x openstego.sh
$ ./openstego.sh extract -sf output-compressed.png -xd .
Enter Password:
Extracted file: ./nut.txt