A long time ago, in a mexican company far far away we needed to download some files from a Bank to automate some process... but to do that the bank would force

A long time ago, in a mexican company far far away we needed to download some files from a Bank to automate some process... but to do that the bank would force us to use some crappy custom client software that was windows only. We reverse engineer it and it turned to be simply hitting a predefined endpoint for an encrypted file that then was encrypted with a hard coded custom script . We happily extracted the auth data and setup a script that did the same in a cheap AWS linus box. I think it's working well to this day, more than 10 years later.