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Douglas Santos

11 posts
Douglas Santos is Sucuri’s Malware Analyst who joined the company in 2015. Douglas main responsibilities include helping our customers. His professional experience covers 17 of ethical hacking. When Douglas isn’t poking malware code, you might find him doing landscape photography and hacking games. Connect with him on our Twitter.
Labs Note
  • Ecommerce Security
  • Sucuri Labs
  • Website Malware Infections
  • Website Security
  • WordPress Security

Fake WordPress Functions Conceal assert() Backdoor

  • Douglas Santos
  • December 8, 2020
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.…
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Lightbox Adware - From Innocent Scripts to Malicious Redirects
  • Security Education
  • Website Malware Infections
  • Website Security

Why is Your Website a Target? The SEO Value of a Website

  • Douglas Santos
  • June 24, 2019
Website security is what we eat, sleep, and breathe. It’s what we do best because we deal with hacked websites every single day, thousands of…
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A Puzzling Backdoor Upload
  • Security Education
  • Website Malware Infections
  • Website Security

A Puzzling Backdoor Upload

  • Douglas Santos
  • May 3, 2018
After a successful compromise, backdoors are frequently left behind and function as a point of re-entry into the website environment. These malicious pieces of code…
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Javascript Injection Creates Rogue WordPress User
  • WordPress Security

Javascript Injection Creates Rogue WordPress Admin User

  • Douglas Santos
  • December 14, 2017
Earlier this year, we faced a growing volume of infections related to a vulnerability in outdated versions of the Newspaper and Newsmag themes. The infection…
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Labs Note
  • Sucuri Labs

The Tale of a Malicious Stored Procedure

  • Douglas Santos
  • November 22, 2016
Nowadays, the most common issues with database injections are related to SPAM. Brian Krebs has a book called Spam Nation, that gives us a more…
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Labs Note
  • Sucuri Labs

Malicious routine stealing WordPress credentials in the wild

  • Douglas Santos
  • November 11, 2016
From the hacker’s perspective, maintaining access to a compromised website for as long as possible, is ideal. One way to achieve this goal, is by…
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Labs Note
  • Sucuri Labs

Joomla Backdoor Hidden in Plain Sight

  • Douglas Santos
  • August 31, 2016
In order to avoid detection and maintain access to compromised websites, attackers use different techniques to hide their malicious code. During our cleanup investigation we…
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  • Web Pros
  • Website Malware Infections

200k+ Parked/Expired Domains Used to Distribute Malicious Ads

  • Douglas Santos
  • June 29, 2016
Recently we wrote about domain renewal scams that used real paper letters to tricks site owners into transferring their domains and renewing them for 3-4x…
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Labs Note
  • Sucuri Labs

MiniCMS as a Spam Site Generator

  • Douglas Santos
  • June 14, 2016
SEO spam is very common for a reason — money. Spammers are paid to promote websites on Google. We deal with lots of SEO spam…
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  • Security Advisory
  • Vulnerability Disclosure
  • WordPress Security

WP Mobile Detector Vulnerability Being Exploited in the Wild

  • Douglas Santos
  • June 2, 2016
***Update: The WP Mobile Detector plugin has been patched to address the vulnerability. Please update as soon as possible. Note that the latest version don’t…
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Labs Note
  • Sucuri Labs

Magento CC stealer adding user’s credentials to the loot

  • Douglas Santos
  • May 25, 2016
While analyzing a compromised Magento site, we found another Credit Card (CC) stealer variation. We posted a few times about this type of malware, but…
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