As malicious npm packages and their dangers have been a frequent topic of discussion, recent security incidents highlight the importance of minimizing the risks of arbitrary command execution with package managers like npm. The postinstall lifecycle hook in Node Package Manager (npm) provides significant value to developers by enabling them to perform various tasks or configurations as part of the package installation process. However, this can also be exploited by malicious actors if not handled properly. Security professionals identify data-at-rest security as protecting sensitive information stored or at rest, and various measures are available to ensure it, such as on-demand decryption and access control logic. The attack surface of a developer includes environment variables, configuration files, SSH keys, and macOS keyboard shortcuts, which can be vulnerable if not handled securely. A recent incident showed that malicious actors can exfiltrate keyboard text replacements using the defaults command, which stores these settings under the System Preferences application. To mitigate security risks, developers should ignore scripts on npm package installations, use safe npm defaults, secure storage, and follow best practices to prevent arbitrary command execution.