When my site's WordPress admin dashboard is loading, I get a suspicious message on the bottom-left of the page, saying Waiting for meetlookup.com....
The message should be Waiting for <my_domain>.<my_tld>...
I think my site has been hacked by some malicious plugin or theme, but I don't know how to address the problem.
in my experience, that's caused by browser extension, you can try with disable your extension and try reload.
I don't have an answer or certain solution, but I was experiencing the same behavior on one of my desktops. Linux Mint 20.1 Ulyssa using Chrome Version 91.0.4472.77 I ran a security check of my extensions with nothing coming back as suspect. I disabled one (Getcolor) and cannot replicate the "waiting for meetlookup.com" after that. Interestingly that particular extension that I just installed to use once last week appears to no longer be listed in the Chrome web store.
It is spyware. After uninstalling all extensions are gone. I recommend changing your passwords as they were exposed :(
