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Search Results for: backdoor

May 10, 2022Ben Martin

Examining Emerging Backdoors

Next up in our “This didn’t quite make it into the 2021 Threat Report, but is still really cool” series: New backdoors! Backdoors are a crucial component of a website infection. They allow the attackers ongoing access to the compromised environment and provide them a…

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What are website backdoors Sucuri Security

November 18, 2021Allison Bondi

What is a Website Backdoor?

What is a Backdoor? A backdoor provides a shortcut for authorized or unauthorized users to gain access to an unauthorized location of a website, software, or system. There are many…

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Malicious Magento User Creator

August 4, 2021Liam Smith

Examining Unique Magento Backdoors

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…

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Backdoor SQL Trigger

February 25, 2021Luke Leal

SQL Triggers in Website Backdoors

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…

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January 7, 2021Luke Leal

Evaluating Cookies to Hide Backdoors

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…

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Labs Note

December 8, 2020Douglas Santos

Fake WordPress Functions Conceal assert() Backdoor

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…

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Labs Note

December 1, 2020Luke Leal

“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 access as if they had…

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Labs Note

October 6, 2020Krasimir Konov

Backdoor Shell Dropper Deploys CMS-Specific Malware

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….

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Labs Note

September 28, 2020Luke Leal

Backdoor Obfuscation: tempnam & URL Encoding

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…

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Backdoor SQL Trigger

August 26, 2020Luke Leal

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 use it for the foreseeable future. Unfortunately, attackers are also…

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Fake WordPress Plugin SiteSpeed Hosts Malicious Ads & Backdoors

August 13, 2020Luke Leal

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 to evade detection from malware scanners. The hexadecimal/decimal obfuscation is…

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