Malwarebytes Key Checker by hqcrack.net
Download: https://mega.nz/file/ [link intentionally broken] V84FRb6R#4Htyfz0fidqlHPOvimFPL6ToXCip0b4qKNW9XiI6gJg
The sample listed above is LIVE MALWARE
I've allowed the post for anyone interested in reversing it, but beware, this is live malware. It will download additional malware. It will steal cryptocurrency wallets. It will connect back to their command and control infrastructure. There is nothing safe of nerfed about this sample.
Also it does not work as a key checker. So even if you are desperate, don't bother trying.