With the link I provided, a hacker can use iOS emulated in QEMU for:
• Restore / Boot
• Software rendering
• Kernel and userspace debugging
• Pairing with the host
• Serial / SSH access
• Multitouch
• Network
• Install and run any arbitrary IPA
Unlike a locked-down physical Apple device. It's a good starting point.
I'm much more convinced that you're competent in the field of forensics. But I still don't think suspicious network traffic can be categorically defined as a 'device breach.'
For all you know, the traffic you've observed and deem malicious could just as well have been destined for Apple servers.
Apple traffic goes to 17.0.0.0/8 + CDNs aliased to .apple.com, which my egress router blocks except for Apple-documented endpoints for notifications and software update, https://support.apple.com/en-us/101555
They said upthread that they had blocked 17.0.0.0/8 ("Apple"), but maybe there are teams inside Apple that are somehow operating services outside of Apple's /8 in the name of Velocity? I kind of doubt it, though, because they don't seem like the kind of company that would allow for that kind of cowboying.
I don't doubt it in the slightest. Every corporate surveillance firm—I mean, third-party CDN in existence ostensibly operates in the name of 'velocity'.