Is there any way to make a backup from download mode?

I have an Alcatel Idol 3 phone with a broken power button and a broken touchscreen. I am only able to boot into download mode by holding down the volume up and down buttons while plugging it into the charger. Is it possible to make an image of the internal memory on my phone instead of flashing it? Can QFIL do it, or is that just for writing data?