Detekt is a free Python tool that scans your Windows computer (using Yara, Volatility and Winpmem) for traces of malware. Specifically, it can detect the presence of pre-defined patterns which are unique identifiers of commercial surveillance spyware FinFisher FinSpy and HackingTeam RCS. Note however, that Detekt may not be able to detect the most recent versions of those malware families.