Your ISP knows the Mac address of your router since it requests a public IP from them using DHCP. That’s why if you contact support they usually can confirm the brand of your router by doing an oui lookup.
In theory the FBI could have collected a list of MACs and optionally used an ASN lookup on the public IP and then handed each ISP their list of MACs, which the ISP could associate back to customers to contact. It would only not work for customers who spoof their router WANs ethernet mac.
But I think just patching it is a normal and fine solution imo.
Your ISP knows the Mac address of your router since it requests a public IP from them using DHCP. That’s why if you contact support they usually can confirm the brand of your router by doing an oui lookup.
In theory the FBI could have collected a list of MACs and optionally used an ASN lookup on the public IP and then handed each ISP their list of MACs, which the ISP could associate back to customers to contact. It would only not work for customers who spoof their router WANs ethernet mac.
But I think just patching it is a normal and fine solution imo.
Or I mean, Shodan exists. I’m sure the gov has better.
A theoretical botnet I was looking at on github used shodan to identify possible targets to infect.