Sure thing, they all seemed to have a similar exploit as seen here https://share.getcloudapp.com/Jru7WZA8
once I deleted the plugin the actual root of the cause was gone. At that point, there was an injection of some kind. To add further headache, out of nowhere an admin user was created using some sort of fake WooCom email address.
All 3 sites seemed to be running different versions of WooCommerce too. I suppose it very well could be Woo related as well but the fact it was nested in the plugin was sort of a red flag to me.
We were running the last versions of WP Accessibility too. Usually, I can sniff out the malicious code but this was really sneaky. I reported to Sucuri but unfortunately, I had deleted the plugin prior to the cleanup.
We were using the latest version of WordPress too. All other plugins were updated too.
Hope that helps.
I don’t mean to cause alarm but if its a glaring hole hopefully we can knock it quickly.