I don’t advocate the use of viruses, worms, Trojan horses, ransomware, or anything else that can screw up someone’s system or violate their privacy.
It’s oddly satisfying to peak inside them though. Like disassembling a clock.
Kournikova was my first pick because she’s written in Visual Basic, which isn’t too painful to read. She’s also so old it’s unlikely anyone would be able to use this walk-through to create something malicious. Old in malware years anyway. In human years, she’ll be seventeen next month.