When a website is hacked, we often find that attackers have injected multiple backdoors, web shells, and malicious code that allows them to regain access if the original vulnerability is patched. This allows hackers to continue abusing the website and server resources. One of the techniques they use is to add fake extensions that perform […]
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RSS feed for this sectionWordPress Performance Optimization Guide
Since launching our website performance testing tool we have been getting a lot of questions about how to improve the speed and performance of WordPress websites. Many website owners are not aware how slow their sites are, so we are excited to help shed some light on the matter. There are a number of different […]
vBulletin Malware – When Hackers Compete for Backdoor Control
A common pattern we see in compromised websites is the presence of backdoors and other malicious code. During Q3 of 2016, we found that 72% of all compromises that we encountered had a PHP-based backdoor hidden within the site. Attackers experiment with various techniques and types of malware to abuse server resources and distribute spam […]
Labs Notes Monthly Recap – Dec/2016
Last month there were a number of interesting website hacks being analyzed by our Malware Research Team (MRT) and Incident Response Teams (IRT). The Sucuri Labs website provides technical analysis and industry updates directly from our teams on the front line. You can read past monthly recaps for an overview of the posts we’ve released […]
Introducing Accelerated Mobile Links: Making the Mobile Web App-Quick
In 2017, we’ve predicted that more than half of the traffic to Cloudflare’s network will come from mobile devices. Even if they are formatted to be displayed on a small screen, the mobile web is built on traditional web protocols and technologies that were designed for desktop CPUs, network connections, and displays. As a result, […]
Cloudflare’s Transparency Report for Second Half 2016 and an Additional Disclosure for 2013
Cloudflare is publishing today its seventh transparency report, covering the second half of 2016. For the first time, we are able to present information on a previously undisclosed National Security Letter (NSL) Cloudflare received in the 2013 reporting period. Wikipedia provides the most succinct description of an NSL: An NSL is an administrative subpoena issued […]
Injection of Unwanted Google AdSense Ads
During the last couple of years, it has become quite prevalent for hackers to monetize compromised sites by injecting unwanted ads. They can be pop-up ads triggered when a visitor spends a certain amount of time on an infected page, or automatic redirection of mobile traffic to URLs that belong to ad networks. It’s not […]
Spotlight: How a Social Media Expert Finds Website Security
With the new year upon us, it makes sense to reflect on how things have changed. Our Malware Research and Incident Response teams just published their latest report on trends in website security, and in the coming weeks we plan to write about the latest upgrades to the Sucuri dashboard. Looking back at our website […]
Hacked Website Report – 2016/Q3
Today we are proud to release our quarterly Hacked Website Report for 2016/Q3. This report is based on data collected and analyzed by the Sucuri Remediation Group (RG), which includes the Incident Response Team (IRT) and the Malware Research Team (MRT). The data presented is based on the analysis of over 8,000 infected websites. This […]
Website Malware Targets Mobile Platforms
Navigating the web on a mobile device can be tricky even when you’re browsing clean sites. If hackers are involved, the frustration of a pop-up can turn into the dangerous possibility of harmful mobile malware. The increase in mobile internet browsing has prompted attackers to adapt their techniques, targeting mobile-specific platforms and distributing spam and […]
