Sucuri Labs

WordPress Malware Disables Security Plugins to Avoid Detection

An alarm or monitoring system is a great tool that can be used to improve the security of a home…

3 months ago

Reflected XSS in WordPress Plugin Admin Pages

The administrative dashboard in WordPress is a pretty safe place: Only elevated users can access it. Exploiting a plugin’s admin…

3 months ago

Using assert() to Execute Malware in PHP 7 Environments

Initially released December 2015, PHP 7 introduced a multitude of performance and security improvements. Approximately 43.7% of websites across the…

4 months ago

Persistent WordPress User Injection

Our team recently stumbled across an interesting example of malicious code used to add an arbitrary user inside WordPress. The…

4 months ago

Magento Multiversion (1.x/2.x) Backdoor

The Magento 1 EOL date has already passed, however it’s evident that a large number of websites will continue to…

4 months ago

COVID-19 Chloroquine Pharmaspam

A recent SiteCheck scan of an organization’s website showed an interesting pharmacy spam injection targeting COVID-19-related pages of websites. The…

4 months ago

CDN-Filestore Credit Card Stealer for Magento

During a website remediation, we recently discovered a new version of a Magento credit card stealer which sends all compromised…

4 months ago

Web Crawler & User Agent Blocking Techniques

This is a simple script that allows hackers to block specific crawlers based upon website requests from specific user-agents. This…

4 months ago

Smoker Backdoor: Evasion Techniques in Webshell Backdoors

“Smoker Backdoor” is a PHP webshell backdoor that uses hexadecimal and decimal obfuscation in conjunction with the PHP function goto…

4 months ago

String Concatenation: Obfuscation Techniques

While string concatenation has many valuable applications in development — such as making code more efficient or functions more effective…

4 months ago