Malware Dropper Takes Advantage of COVID-19 Pandemic
Krasimir Konov Since April, our team has been tracking the spread of a PHP malware dropper. It’s impacting unsuspecting victims who thought they were downloading a mapping…
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Website Malware Infections
854 posts
Fake WordPress Functions Conceal assert() Backdoor
Douglas Santos 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.…
Obfuscation Techniques in MARIJUANA Shell “Bypass”
Luke Leal 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…
“Free” Symchanger Malware Tricks Users Into Installing Backdoor
In a previous post, I discussed how attackers can trick website owners into installing malware onto a website — granting the attacker the same unauthorized…
PrestaShop SuperAdmin Injector and Login Stealer
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…
Evasive Maneuvers in Data Stealing Gateways
Cesar Anjos We have already shared examples of many kinds of malware that rely on an external gateway to receive or return data, such as different malware…
Another Credit Card Stealer That Pretends to Be Sucuri
Denis Sinegubko During a routine investigation, we found yet another web skimmer that pretends to be related to Sucuri. One of our Remediation Analysts, Liam Smith, found…
Code Comments Reveal SCP 173 Malware
We sometimes find malware code injections that contain strange code comments, which are normally used by programmers to annotate a section of code — for…
ALFA TEaM Shell ~ v4.1-Tesla: A Feature Update Analysis
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…
Legacy Mauthtoken Malware Continues to Redirect Mobile Users
During malware analysis, we regularly find variations of this injected script on various compromised websites: . The variable “_0x446d” assigns hex encoded strings in different…
CSS-JS Steganography in Fake Flash Player Update Malware
This summer, MalwareBytes researcher Jérôme Segura wrote an article about how criminals use image files (.ico) to hide JavaScript credit card stealers on compromised e-commerce…