Which of the following signs is an indicator of a Google Cloud security incident?

The modification of privileged Google group accessibility to make it available to the public is a clear indicator of a potential security incident. Such a change can compromise the security of sensitive information and resources by allowing unauthorized individuals or entities access to areas that should be protected. It suggests a deliberate alteration of security settings that could lead to data breaches or exposure of critical assets, making it a significant red flag for security teams.

In contrast, routine access by authorized users, the creation of new IAM roles, and regular permission audits represent normal operational activities within a secure environment. Authorized users accessing the system as per their permissions indicates proper functioning rather than an incident. Similarly, creating new IAM roles is a legitimate practice to ensure that appropriate access is given based on roles needed for specific tasks, and conducting regular permission audits is a proactive measure to ensure that access rights remain appropriate and secure. These actions are typically part of best practices for maintaining security rather than indicators of a security breach.