MS and Spider lifted the stack from BSD and failed to give proper credit. All they would have had to do was include
"Copyright (c) 1983 The Regents of the University of California" and they would have been clearly street legal and in compliance with the BSD license. Heck, it even could have been just a comment in the source code.
Instead, they didn't and then passed the code off as their own. That's lifting. Got it?
I need evidence for that. Credit is still there for the other utilities they got from Spider, so why remove the credits in the TCP/IP stack itself?
More lies. You're willing to give Russian crackers a free pass for illegal activity, then falsely accuse legitimate businesses of crimes. No wonder you want to be a defense attorney when you grow up.
Another little law exercise here. If attribution is indeed not there (not proven yet), then it becomes a question of who removed the attribution.
If Microsoft did it, then they are liable for civil damages and criminal punishment (knowingly and for profit, the key ingredients).
If Spider did it, then Spider is liable for civil damages and criminal punishment. But Microsoft would be mostly off the hook. You could not then say Microsoft knowingly infringed, and in that case all criminal bets are off, and civil damages can't be very high (and Microsoft would probably sue Spider to recover them anyway). Microsoft's remedy for future infringement would be simple and relatively inexpensive: stick the attribution back in and then put the new code in the next patch and all future install shipments.