A new Cloudflare infection has once again been targeting WordPress sites. This new iteration of malware mimics a legitimate-looking Cloudflare verification page, which then tricks victims into following various commands and downloading malware. This style of malware is not new – our researcher Ben Martin wrote about a similar campaign targeting WordPress sites back in […]
Tag Archives: Malware
Fake GIF Leveraged in Multi-Stage Reverse-Proxy Card Skimming Attack
In today’s post we’re going to review a sophisticated, multi-stage carding attack on a Magento eCommerce website. This malware leveraged a fake gif image file, local browser sessionStorage data, and tampered with the website traffic using a malicious reverse-proxy server to facilitate the theft of credit card data, login details, cookies, and other sensitive data […]
Fake Font Domain Used to Skim Credit Card Data
Recently, a client of ours came to us concerned about credit card theft on their WordPress site. The client’s users reported that their credit card data had become compromised shortly after purchasing products on our client’s website. When investigating the site, two suspicious symptoms appeared: A strange credit card form, and an unfamiliar domain, which […]
Hidden Malware Strikes Again: Mu-Plugins Under Attack
At Sucuri, our security researchers continually monitor for new malware variants and infection techniques targeting WordPress websites. Recently, we’ve uncovered multiple cases where threat actors are leveraging the mu-plugins directory to hide malicious code. This approach represents a concerning trend, as the mu-plugins (Must-Use plugins) are not listed in the standard WordPress plugin interface, making […]
Fake Cloudflare Verification Results in LummaStealer Trojan Infections
Today’s blog post will be a follow up to a previous article we posted a few weeks ago: We continue to see new variants of this malware campaign emerge. WordPress websites continue to be used as staging grounds to trick website visitors into running malicious powershell commands on their Windows computers in order to infect […]
Credit Card Skimmer and Backdoor on WordPress E-commerce Site
The battle against e-commerce malware continues to intensify, with attackers deploying increasingly sophisticated tactics. In a recent case at Sucuri, a customer reported suspicious files and unexpected behavior on their WordPress site. Upon deeper analysis, we discovered a complicated infection involving multiple components: a credit card skimmer, a hidden backdoor file manager, and a malicious […]
Cascading Redirects: Unmasking a Multi-Site JavaScript Malware Campaign
During a recent website security investigation, we uncovered a malicious JavaScript injection affecting a WordPress website. The infection was responsible for redirecting visitors to unwanted third-party domains, ultimately harming the site’s reputation and potentially exposing users to further malicious activity. What was discovered? A customer reached out to us, reporting that their website was unexpectedly […]
Fake WordPress Plugin Impacts SEO by Injecting Casino Spam
Injecting malware via a fake WordPress plugin has been a common tactic of attackers for some time. This clever method is often used to bypass detection as attackers exploit the fact that plugins are not part of the core files of a WordPress site, making integrity checks more difficult. Attackers often hide the malicious plugin […]
WordPress ClickFix Malware Causes Google Warnings and Infected Computers
Since December of last year there has been a new fake Google reCAPTCHA campaign making its way through the WordPress world. Very similar to malware which we wrote about last Summer, the website malware injection attempts to trick unsuspecting victims into executing malicious Powershell commands within Windows OS environments with the end goal of infecting […]
When Spam Hides In Plain Sight
We recently worked on an interesting case where Casino spam was visible in the page source, but couldn’t be located in any of the usual database rows or site files. Sitecheck flagged this as well. Casino and gambling spam is one of the most common types of spam attackers use. They are hoping that victims […]
