If you haven’t already updated WordPress with yesterday’s update, you will want to update immediately. It fixes several vulnerabilities, including critical ones that are out in the wild.
To check if your site is infected, look in .js files for anything that looks unusual appended to the bottom of the file.
They also made a note that it is the source of constant reinfections because this particular attack can hit all sites on the server, meaning all WordPress installations would need updating and cleaned up if any signs of the attack were found, otherwise it could constantly reinfect sites.
The malware tries to infect all accessible .js files. This means that if you host several domains on the same hosting account all of them will be infected via a concept known as cross-site contamination. It’s not enough to clean just one site (e.g. the one you care about) or all but one (e.g. you don’t care about a test or backup site) in such situations – an abandoned site will be the source of the reinfection. In other words, you either need to isolate every sites or clean/update/protect all of them at the same time!
It is believed that the latest update prevents this attack, although WordPress isn’t as detailed in their bug related fixes in update notes recently.
WordPress released an update yesterday, billed as a security release, and encouraged all sites to update immediately. While many sites have autoupdated yesterday, you will need to manually update any sites that did not.
Update Feb 5, 2016: It appears that ransomware is now being delivered to visitors of compromised sites.
Latest posts by Jennifer Slegg (see all)
- Cloudflare Credentials Stolen in Web Developer Chrome Extension Hack - August 18, 2017
- Google Search Console Sends Security Warning Notices for HTTP Sites - August 18, 2017
- Bing Testing Blended Local Mini One Pack in Search Results - August 15, 2017
- Google Still Ignores Last-Modified Meta Tag - August 11, 2017
- Google Ignores Geo Meta Tags in Regular Search Results - August 10, 2017