rnaapp.exe (Windows Modem Connection) is a Windows NT/2000/XP generic process which is used to initialize numbering when the modem attempts to dial in or out.
The process rnaapp is not in any way a virus, a worm, a Trojan horse, spyware, or adware.
It is a process which can be terminated. However, ending the process will cause the modem connection to be lost.
