python3 mtk.py da da MT6765_DA.bin python3 mtk.py r boot boot.img python3 mtk.py w system system.img

It handles the initial handshake between the device's bootloader (preloader) and the flashing software on your PC.

Backing up or wiping specific areas like the NVRAM (which stores your IMEI and network data). How to Use It Importance of DA Files for MTK Devices | PDF - Scribd

This is the most dangerous part. Many websites offer "MT6765 DA File" downloads laced with malware, ransomware, or corrupted code.