Testing according to Bugcrowd VRT

Hello Guys,
I’m starting a new topic called Testing according to Bugcrowd VRT where any questions related to a specific bug category can be asked and clarified. Bugcrowd VRT : https://bugcrowd.com/vulnerability-rating-taxonomy

Here’s my 1st question :

Can someone please explain how to test for this particular bug type in the Bugcrowd VRT:
P4 - Insecure Data Transport - Executable Download - No Secure Integrity Check

Any links to blog posts would be really appreciated.

Kind Regards.