A common trend we see is that bad actors will upload malicious plugins to WordPress sites. These plugins serve a wide variety of functions from injecting spam to redirecting sites to other malicious content. In this article we will examine a more dangerous method where plugins can be…
Sucuri
Vulnerability & Patch Roundup — May 2025
Vulnerability reports and responsible disclosures are essential for website security awareness and education. Automated attacks targeting known software vulnerabilities are one of the leading causes of website compromises. To help educate website owners about potential threats to their environments, we’ve compiled a list of important security updates and…
What Motivates Website Malware Attacks?
The depiction in the media of hackers tends to be that of balaclava-wearing villains who type furiously in a dark basement, motivated by nothing but evil intentions. However, while this may be true in some instances, by and large the determining factors that result in malware attacks are…
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 a common tactic used by attackers to compromise website visitors. Our investigation revealed a malicious plugin operating stealthily within their WordPress environment. What…
Fake Google Meet Page Tricks Users into Running PowerShell Malware
Last month, a customer reached out to us after noticing suspicious URLs on their WordPress site. Visitors reported being prompted to perform unusual actions. We began our investigation, scanning the site for common malware indicators and looking for signs of obfuscated JavaScript or injected iframes. What we found, …
Another Fake Cloudflare Verification Targets WordPress Sites
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…
90 Days to Shine: Why Sucuri’s SSL Certificates Are Living the Short Life (and Why That’s Awesome)
Picture this: your SSL certificate is like a carton of milk in your fridge. Sure, it’s good for a while, but let it sit too long, and you’re inviting a sour situation. At Sucuri, we’ve decided our certificates deserve a fresher approach—90 days fresh, to be exact. That’s…
Understanding CSRF: Cross-site Request Forgery Explained
Cross-Site Request Forgery, often called CSRF (or its other nicknames, Session Riding and XSRF), is a tricky type of attack. In short, it lets attackers make users do things on websites without their consent or knowledge. This attack works by misusing the trust a web application puts in…
Vulnerability & Patch Roundup — April 2025
Vulnerability reports and responsible disclosures are essential for website security awareness and education. Automated attacks targeting known software vulnerabilities are one of the leading causes of website compromises. To help educate website owners about potential threats to their environments, we’ve compiled a list of important security updates and…
MTR For Website Troubleshooting
Let’ s set the scene: You go to visit a website and you get a “connection timed out” error. Is this a browser, internet, firewall, or hosting server issue? How do I know who to contact to get the issue resolved? Should I use ping, traceroute, or an MTR…
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, …
Easy Guide to Saving HAR Files and Console Logs for Troubleshooting
When something goes wrong with a website – whether it is a broken design, slow performance, shows an error message or something else, it is sometimes difficult to find the exact cause of the issue just by looking at the page. That’s where the HAR files or browser…
When Good Software Goes Bad
Most often bad actors try their best to hide their activities by using obfuscated code or by uploading fake plugins or themes that inject simple but malicious scripts into a site. Every now and then we encounter a case where legitimate software is used for malicious purposes. We…
Ad-Jacked: Cybercriminals Inject Google Adsense into WordPress
Recently, we’ve encountered cases where WordPress websites were impacted by Google Adsense hijackers. Attackers inject advertisements and scripts that steal website resources and pump ad views for their adsense accounts. This is not the first time we’ve seen attackers abusing popular Google services. In a previous case, we…
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…
Understanding FTP and SFTP: A Guide to Secure File Transfers
Updating your website means getting files to your server, but the process can feel like a chore when simply navigating in a conventional hosting panel. FTP and SFTP are essential tools for managing files on your server. Whether you’ re uploading website content or downloading backups, these protocols offer…
Vulnerability & Patch Roundup — March 2025
Vulnerability reports and responsible disclosures are essential for website security awareness and education. Automated attacks targeting known software vulnerabilities are one of the leading causes of website compromises. To help educate website owners about potential threats to their environments, we’ve compiled a list of important security updates and…
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…
Quick Guide to Magento Security Patches
Magento remains a popular ecommerce platform in 2025 and its security patches play a vital role in addressing vulnerabilities that could otherwise be exploited by attackers. These patches help prevent issues like data breaches, website defacement, or unauthorized access, ensuring the safety of customer data and store operations….
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…
