Hi P-nhoy,
Thanks for the post. I am familiar with Symantec's own EDR but can't speak on behalf of Cynet 360 or and other vendor's product. Contact them if you believe they have identified a False Positive?
If there is any doubt about whethere or not a script file like C:\\Program Files (x86)\\Symantec\\Symantec Endpoint Protection\\12.1.7004.6500.105\\Bin64\\AVScript13.js is malicious, please submit it to Security Response for analysis.