WordPress Auto-Login Backdoor Disguised as JavaScript Data File
Puja Srivastava During a recent investigation, we discovered a sophisticated WordPress backdoor hidden in what appears to be a JavaScript data file. This malware automatically logs attackers…
Malvertising Campaign Hides in Plain Sight on WordPress Websites
Recently, one of our customers noticed suspicious JavaScript loading across their WordPress website. Visitors were being served third-party scripts that the site owner never installed.…
Hidden WordPress Backdoors Creating Admin Accounts
During a recent cleanup of a compromised WordPress website, we discovered two different malicious files designed to silently manipulate administrator accounts. Attackers often inject such…
Malicious JavaScript Injects Fullscreen Iframe On a WordPress Website
Last month, we came across an ongoing JavaScript-based malware campaign affecting compromised websites. The malware injects a fullscreen iframe that silently loads content from a…
Unauthorized Admin User Created via Disguised WordPress Plugin
Recently at Sucuri, we investigated a malware case reported by one of our clients. Their WordPress site was compromised, and the attacker had installed a…
Uncovering a Stealthy WordPress Backdoor in mu-plugins
Recently, our team uncovered a particularly sneaky piece of malware tucked away in a place many WordPress users don’t even know exists: the mu-plugins folder.…
WordPress Redirect Malware Hidden in Google Tag Manager Code
Last month, a customer contacted us after noticing their WordPress website was unexpectedly redirecting to a spam domain. The redirection occurred approximately 4-5 seconds after…
Stealthy PHP Malware Uses ZIP Archive to Redirect WordPress Visitors
Last month, a customer contacted us, concerned about persistent and inexplicable redirects on their WordPress website. Our investigation quickly unearthed a sophisticated piece of malware…
Stealthy WordPress Malware Drops Windows Trojan via PHP Backdoor
Last month, we encountered a particularly interesting and complex malware case that stood out from the usual infections we see in compromised WordPress websites. At…
Analysis of a Malicious WordPress Plugin: The Covert Redirector
A few weeks ago, we received a support request from a website owner who was experiencing unexpected redirects. Visitors landed on the website normally, but…
Fake Java Update Popup Found in Malicious WordPress Plugin
We recently assisted a customer who reported a persistent and concerning “Java Update” pop-up appearing on their WordPress website. This type of deceptive notification is…