Write some Software

We're looking to buy a custom remote administration tool (RAT), including it's sourcecode. This can either be: 1) a totally original tool written from scratch or 2) something based on an already existing sourcecode The software has to run fully undetected by antivirus software and have seamless integration. It has to be able to run on all versions of windows, noting that it's totally possible for the user to run it as administrator. (i.e. we can manually give it admin privileges) The use of this software will be fully legit and within the boundaries of the law. The purpose is to monitor workstations in a business without the users' knowledge (which is legal in the country of application). Functionalities of the software will be fully discussed after the initial bid, after which you'll be able to readjust the bid accordingly. You have liberty regarding the programming language you choose to use.