我无法删除这些虚拟机，因为它们可能受到黑客的保护。但是我成功删除了项目本身。攻击者是否可以通过任何方式重新获得访问权限并再次启动VM？另外，发生这种情况是因为我错误地在git上发布了private-key.json，因为我的gcp仍然容易受到攻击？
This method immediately marks a project to be deleted and sends a notification email to the project owner. A project that is marked for deletion is not usable. If the project has a billing account associated with it, that association is broken, and will not be reinstated even if the project delete operation is immediately canceled. After approximately 30 days, the project will be fully deleted. To stop this process during the 30-day period, see the steps to restore a project.
可以找到更多详细信息here