Several questions about fgov2.ova

[aacprime]

Kinda offtopic tbh, but I need answers.
Fire Emblem Heroes has similar to FGO ways of spotting if the device has root access or/and if the device is an emulator. Several months ago someone figured out FEH works fine on that lollipop fgov2.ova image. It still works perfectly even today.
So, I want to "port" this workaround to newer version of memu. I need to understand how exactly is that fgov2 image modified. One man linked me this comment of wdcat:
"I just remove all content in /proc/bus/pci/devices by modifying kernel;
delete /system/bin/su and /system/xbin/su;
change system property in /default.prop and /system/build.prop".
Well, 2nd and 3rd steps are pretty easy, but what about "modifying kernel"? How do I modify kernel on MEmu and what exactly I have to do with it? Are there some extra steps besides these three? How can I contact wdcat if he doesn't visit github anymore?

[wDCat]

There is a similar guide(Chinese):https://bbs.pediy.com/thread-207538.htm
and I modified this function
static int show_device(struct seq_file *m, void *v);

[aacprime]

It's such a relief you're still around here.
Thing is, I've tried to figure it out by myself for several days, but I couldn't do the simple thing - locate boot.img in memu. I mean dev/block/platform folder doesn't exist and I have no idea where else to search for it. I've located sda3 with kernel and ramdisk files but couldn't unpack it properly.

[wDCat]

Use vmware or vbox to mount MEmu44-2017****-disk1.vmdk and MEmu44-2017****-disk3.vmdk
and you will find a file "kernel" in a 6.4M partition.This is the zImage file.