I downloaded FastCopy Portable for the first time. The Malware-Scanner I'm using (Avira) reports the following on the related paf.exe-file:
Description: The term 'TR' denotes a trojan horse that is able to spy out data, violate your privacy, or perform unwanted modifications to the system.
A generic detection routine designed to detect common family characteristics shared in several variants. This special detection routine was developed in order to detect unknown variants and will be enhanced continuously.