Same issue, i used updraft backups and update last version of AAM (5.9.9.1).
I don’t know if it’s fixed but i noticed this :
“5.9.9 : Fixed security vulnerability reported by “Props to Ov3rfly””
I checked my hacked database :
INSERT INTO wp_options
(option_id
, option_name
, option_value
, autoload
) VALUES
(1, ‘siteurl’, ‘https://js.wiilberedmodels.com/zls.js?foup’, ‘yes’),
(2, ‘home’, ‘https://js.wiilberedmodels.com/temps?tt=2&’, ‘yes’),