SystemBC is a proxy botnet that exploits vulnerable commercial virtual private servers (VPS) to maintain an average of 1,500 bots daily, facilitating high volumes of malicious traffic. With over 80 command-and-control servers, it has been utilized by various threat actors, including ransomware gangs, and is characterized by long infection lifetimes and numerous unpatched vulnerabilities in compromised systems. Researchers highlight that SystemBC's operations are designed for volume rather than stealth, making detection challenging for security efforts.