You received a "Someone just used your master password to try to log in to your account from a device or location we didn't recognize" email?

And your master password was secure/not used anywhere else, etc.?

Did we all (that's 8 of us now in the thread) get compromised a few years ago (using the LastPass extension?) and someone just mass attempted to try all of those passwords..?

Edit: since you're tracking IPs found in this thread (thanks!) my attacker's was 160.116.189.21 . You also have 1 ip duplicated (160.116.88.235) which was from the same user both times. You can also add 160.116.95.249 which was just posted