Whats a security descriptor?
Security Descriptors control access to operating system objects. Among the objects that they apply to are services, including RASMAN. A security descriptor includes a Discretionary Access Control List, or DACL; this is a list of Access Control Entries, or ACEs. Each ACE specifies the particular rights that one user or group has with respect to the object. The DACL therefore comprises the entire list of rights that all users and groups have with respect to the object.