A screenshot of the Avast Alert window with the Details option selected might help.
I have to say the executable file name looks very strange Diablo 4 retail.exe why it wouldn't be something like Diablo4.exe - is it phoning home to ensure you have a paid version ?
Attaching Images to your post - When you Click the Reply button it opens a text window for you to post your comment (reply or post).
Click the Preview button, that shows what you have input and expands it to include 'Attachments and other options'. Click that it further expands, here you can attach images, etc. at the bottom of your post.
See my attached image, click to expand.