Hi liannemurphy,
As far as I understand, you’ll get one of these notifications every time a file changes. This means that legitimate WordPress updates and plugin updates will trigger an alert. Without knowing your situation, its hard to say for sure; however, I’ve received many messages like this due to routine WordPress updates. I’ve even received messages notifying me that my .htaccess file had changed, the funny thing being that the security plugin was the thing that changed it (in order to keep hackers out).
From your screenshot, it looks like you ran WordPress updates and plugin updates recently. Of course it’s possible that there’s something worse going on — it’s hard to know from this vantage point.
What version of WordPress are you running? Did you run any updates recently, or were you notified of automatic WordPress security updates?
