Cobalt Strike is a commercial software tool originally designed for penetration testers to simulate cyberattacks and assess network security. It provides features such as command and control, stealthy malware deployment, and post-exploitation techniques. While intended for ethical hacking, Cobalt Strike has become popular among cybercriminals, who use it to launch real-world attacks, steal data, and evade detection. Its dual use makes it a significant concern in cybersecurity.