Modular malware is a type of malicious software designed with separate, interchangeable components or modules. This architecture allows cybercriminals to easily add, remove, or update specific functions, such as stealing data, spreading to other systems, or evading security measures. Because of its flexible design, modular malware can adapt to different targets and objectives, making it harder for traditional security tools to detect and block. Attackers often deploy a basic loader first, which then downloads additional malicious modules as needed, enabling stealthy and highly customizable attacks.