The driver file itself ( usb2ser.sys ) is a legitimate MediaTek binary. However, repackaged installers sometimes add bloatware. Always scan with Malwarebytes or VirusTotal. The safest route is to obtain the fixed .inf and .sys files from known developer forums (XDA Developers, Hovatek) and install manually.
The MTK USB Driver (specifically the v5.xxxx series, often labeled as v108 internally or in installer packages) acts as the bridge. It allows the Windows operating system to detect the device when it is powered off or in BROM (Boot ROM) mode. mtk usb driver v108 fixed