SAP security research is one of my basic duties in Positive Technologies. Moreover, I had to think of what I would speak about to the participants of our PHDays III forum. Thus, I came to the following subject of research: how to hide a user with the SAP_ALL profile (i.e. all possible authorizations) in the system. If a malicious user manages to log in to the system and get the authorization to create users and assign privileges to them, then his next most probable step is to create a new account for himself, of course with all authorizations in the system. However, this user is listed in the results of internal checks and external audits, and there is zero chance that a user with SAP_ALL authorizations will not arouse any interest.