Luke Leal

Sucuri Blog

Attackers are always trying to come up with new ways to evade detection from the wide range of security controls available for web applications. This also extends to malware like PHP shells, which are typically left on compromised websites as a backdoor to maintain unauthorized access. MARIJUANA is the name ... Read More

In a previous post, I discussed how attackers can trick website owners into installing malware onto a website — granting the attacker the same unauthorized access as if they had exploited a vulnerability or compromised login details for the website. But did you know attackers use the same tactic against ... Read More

Sometimes, website owners no longer want to own a domain name and they allow it to expire without attempting to renew it. This happens all the time and is totally normal, but it’s important to remember that attackers regularly monitor domain expirations and may target certain domains that meet specific ... Read More

Often when a website is injected with SEO spam, the owner is completely unaware of the issue until they begin to receive warnings from search engines or blacklists. This is by design — attackers intentionally try to prevent detection by arranging injected links so they are not visible to average ... Read More

According to W3Tech’s data, PrestaShop is among the most popular CMS choices for existing ecommerce websites, so it should come as no surprise that malware has been created to specifically target these environments. We recently came across an infected PrestaShop website with malware which was automatically injecting a super admin ... Read More

We sometimes find malware code injections that contain strange code comments, which are normally used by programmers to annotate a section of code — for example, a short description of a feature or functionality for other developers to reference. Oftentimes, hackers aren’t interested in leaving comments describing how their injected ... Read More

We’ve seen a wider variety of PHP web shells being used by attackers this year —  including a number of shells that have been significantly updated in an attempt to “improve” them. Depending on the scope of changes and feature enhancements that are added to an existing web shell’s source ... Read More

A PHP shell containing multiple functions can easily consist of thousands of lines of code, so it’s no surprise that attackers often reuse the code from some of the most popular PHP web shells, like WSO or b374k. After all, if these popular (and readily available) PHP web shells do ... Read More

We often see hackers reusing the same malware, with only a few new adjustments to obfuscate the code so that it is more difficult for scanning tools to detect. However, sometimes entirely new attack tools are created and deployed by threat actors who don’t want to rely on obfuscating existing ... Read More

During a recent investigation, a Magento admin login phishing page was found on a compromised website using the file name wp-order.php. This is an odd file name choice for a Magento phishing page, but nevertheless it successfully loads a legitimate looking Magento 1.x login page. What is not immediately visible ... Read More