Their most recent trick? To infect random WordPress plugins with malicious code that can be activated later to harvest and exfiltrate payment card information.
WordPress has gotten pretty good at ferreting out malicious code residing in the 'wp-includes' and 'wp-admin' directories. Those are the places that most other anti-malware software looks first. So malicious code that relies on being in either of those directories doesn't tend to last long enough to pay dividends to the hackers.
Naturally this has prompted them to find workarounds. This year's big evolution in the ongoing war between hackers and security professionals seems to be hiding code in places that not many would think to look for it.
So far that seems to be working out well for the hackers and card scraping type attacks are on the rise again this year.
The good news is that if you have a WordPress ecommerce site and want to minimize your risk there are several things you can do.
Here are the Big Three:
The holiday season is a very big deal to online vendors but it also carries some risk. Make sure you're minimizing yours.