Website Security News
During a recent investigation into a compromised Magento ecommerce environment, we discovered the presence of five different backdoors that would provide attackers with code execution capabilities. The techniques used by the attackers in these backdoors illustrates the ever-changing landscape of website security and highlights some…
The official PHP git repository, http://git.php.net/, was compromised this Sunday, March 28. An attacker was able to modify the PHP source code twice and inject a backdoor into it. Thankfully,…
Over the past year, there’s been an increasing trend of WordPress malware using SQL triggers to hide malicious SQL queries within compromised databases. These queries inject an admin level user…
Last November, we wrote about how attackers are using JavaScript injections to load malicious code from legitimate CSS files. At first glance, these injections didn’t appear to contain anything except…
Read More about Whitespace Steganography Conceals Web Shell in PHP Malware
Identifying website backdoors is not always an easy task. Since a backdoors primary function is to conceal itself while providing unauthorized access, they are often developed using a variety of…
In an effort to maintain unauthorized access or profit off a website’s environment long after an initial compromise, attackers commonly leverage a variety of different techniques and tactics. These techniques…
A few weeks ago, I was manually inspecting some files on a compromised website. While checking on a specific WooCommerce file, I noticed something interesting. Among 246 other lines, this…
Read More about Fake WordPress Functions Conceal assert() Backdoor
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…
Read More about Obfuscation Techniques in MARIJUANA Shell “Bypass”
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…
Read More about “Free” Symchanger Malware Tricks Users Into Installing Backdoor
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 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…
