Plugin-driven malware is a modular malicious program whose core payload can load extra components after infection. The base implant usually provides persistence, communication with a command-and-control server, and basic control, while plugins add functions such as keylogging, screen capture, credential theft, audio capture, or browser-session abuse.
This design matters because it lets attackers change capabilities without replacing the whole malware family. A sample may look familiar to defenders while its behavior changes through new modules delivered later. In real attacks, that flexibility helps operators tailor spyware, ransomware support tools, or remote-access trojans to a target. Defenders look for dynamic module loading, unusual plugin downloads, and new behavior appearing on an otherwise known implant. Application control, network monitoring, endpoint detection, and limiting user privileges can reduce the chance that new plugins are added or executed.