I got a response from Symantec.
We have analyzed your submission. The following is a report of our findings for each file you have submitted:
filename: C:\Users\Desktop\RSRunner.zip
machine: Machine
result: See the developer notes
filename: RSRunner.exe
machine: Machine
result: NAV is falsely identifying this file as a virus
Developer notes:
C:\Users\Desktop\RSRunner.zip is a container file of type ZIP
RSRunner.exe is falsely identified as malicious. To fix this problem, please install the latest available definitions by following the instructions at the end of this email message. This file is contained by C:\Users\Desktop\RSRunner.zip
So, it's a false positive after all.