Nothing is ever undetected forever ... it is undetected for now .. but steam will always apply patches and updates to the game so when you use hacks there's always a risk of being banned. Usually if it is undetected the only way to get banned is over-watch which means people are noticing that you are doing amazing or see you hacking. Anyways as with this and all hacks on this site .. When you go to open cs:go and an update shows up i would recommend deleting the hack and waiting for a new one.