Website Security News
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 techniques that can make it challenging to detect. For example, an attacker can inject a…
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…
A large majority of the malware we find on compromised websites are backdoors that allow an attacker to maintain unauthorized access to the site and execute whatever commands they want….
Read More about Backdoor Shell Dropper Deploys CMS-Specific Malware
In an attempt to avoid detection, attackers and malware authors are always experimenting with different methods to obfuscate their malicious code. During a recent investigation, we came across an interesting…
Read More about Backdoor Obfuscation: tempnam & URL Encoding
Website reinfections are a serious problem for website owners, and it can often be difficult to determine the cause behind the reinfection — especially if you lack access to necessary…
Read More about The Hidden PHP Malware that Reinfects Cleaned Files
Initially released December 2015, PHP 7 introduced a multitude of performance and security improvements. Approximately 43.7% of websites across the web currently use PHP 7.x, making it an incredibly popular…
Read More about Using assert() to Execute Malware in PHP 7 Environments
