RootKit and BirdCage
Meet RootKit the hacker and his ransomware, BirdCage. RootKit is one of the villains of the PassKitty universe and even though he's only a teenager, his malware is relatively well known in the hacker and cybersecurity communities. Birdcage's code in the background is very lightly modified code from the real-world ransomware, Sodin. I modified the code in Eclipse and took a screenshot to create the background to make it look convincing.