Third party security apps tend to classify most, if not all VPNs as malicious to some degree. This is mostly due to the fact that a VPN is setting up connections that are extraneous to the system's usual network stack. Often times this can also be due to anti-competitive behavior due to the fact that the security software's parent company also happens to offer a VPN. Rest assured, our binaries are signed and accounted for by the OS vendor.