[NanoCore](https://attack.mitre.org/software/S0336) is a modular remote access tool developed in .NET that can be used to spy on victims and steal information. It has been used by threat actors since 2013.(Citation: DigiTrust NanoCore Jan 2017)(Citation: Cofense NanoCore Mar 2018)(Citation: PaloAlto NanoCore Feb 2016)(Citation: Unit 42 Gorgon Group Aug 2018)