Sucuri Blog
  • Products
    • Website Security Platform
    • Website Firewall (WAF)
    • Multi-Site plans
    • Custom & Enterprise Plans
    • Partnerships
  • Features
    • Detection
      Website Monitoring & Alerts
    • Protection
      Future Website Hacks
    • Performance
      Speed Up Your Website
    • Response
      Help For Hacked Websites
    • Backups
      Disaster Recovery Plan
  • Resources
    • Guides
    • Webinars
    • Infographics
    • Blog
    • SiteCheck
    • Reports
    • Email Courses
  • Pricing
  • Immediate Help
  • Login
Sucuri Blog
  • Products
    • Website Security Platform
    • Website Firewall (WAF)
    • Multi-Site plans
    • Custom & Enterprise Plans
    • Partnerships
  • Features
    • Detection
      Website Monitoring & Alerts
    • Protection
      Future Website Hacks
    • Performance
      Speed Up Your Website
    • Response
      Help For Hacked Websites
    • Backups
      Disaster Recovery Plan
  • Resources
    • Guides
    • Webinars
    • Infographics
    • Blog
    • SiteCheck
    • Reports
    • Email Courses
  • Pricing
  • Immediate Help
  • Login
  • Immediate Help
Login
Login

New Customer?

Sign up now.
  • Submit a ticket
  • Knowledge base
  • Chat now

Denis Sinegubko

194 posts
Denis Sinegubko is Sucuri’s Senior Malware Researcher who joined the company in 2013. Denis' main responsibilities include researching emerging threats and creating signatures for SiteCheck. The founder of UnmaskParasites, his professional experience covers over 20 years of programming and information security. When Denis isn’t analyzing malware, you might not find him online at all. Connect with him on Twitter.
Uncategorized

How Scammers Abuse Baidu Search Results

  • Denis Sinegubko
  • December 12, 2016
If you use Skype, recently you may have received Baidu link spam from some of your contacts. The links look like this: www.baidu[.]com/link?url=_QIcrpeV-oOPb6HGTgigvW00e0fiBQyFjSui12FrARO#emubahyt= When you click…
Read the Post
Labs Note
  • Sucuri Labs

“Play One” Hidden Style Obfuscation

  • Denis Sinegubko
  • December 9, 2016
For many years, spam injections placed inside legitimate pages remain one of the prevalent types of black hat SEO hacks that we clean. Hackers constantly…
Read the Post
website infected with zip file spam
Uncategorized

Website Spam Infection via Zip File Upload

  • Denis Sinegubko
  • November 21, 2016
Since the beginning of November we’ve been cleaning many sites infected with the same SEO spam malware. The malware creates doorways for hundreds of random…
Read the Post
  • Security Advisory
  • WordPress Security

Learning From Buggy WordPress Wp-login Malware

  • Denis Sinegubko
  • October 31, 2016
When a site gets hacked, the attack doesn’t end with the malicious payload or spam content. Hackers know that most website administrators will clean up…
Read the Post
Labs Note
  • Sucuri Labs

WP Marketplace Attack in the Wild

  • Denis Sinegubko
  • October 17, 2016
A few days ago, colleagues from White Fir Design disclosed an arbitrary file upload vulnerability in the WP Marketplace plugin and helped remove it from…
Read the Post
Labs Note
  • Sucuri Labs

Hijacking PayPal Donations

  • Denis Sinegubko
  • September 21, 2016
Recently we wrote about how hackers hijacked payment process on an ecommerce site and redirected customers to a fake checkout page on a third-party site.…
Read the Post
  • Security Education
  • WordPress Security

Hacking WordPress Sites on Shared Servers

  • Denis Sinegubko
  • September 19, 2016
A website is only as safe as the weakest link on its shared server. Once a hacker gains access to one site on the server,…
Read the Post
Labs Note
  • Sucuri Labs

Stealing Credit Card Details from PrestaShop

  • Denis Sinegubko
  • August 23, 2016
We wrote multiple times about various attacks on e-commerce sites that try to steal credit card details of their customers. In most cases, all such…
Read the Post
Labs Note
  • Sucuri Labs

Undeletable Doorway. Kind of.

  • Denis Sinegubko
  • August 18, 2016
Recently we cleaned a site that had a malicious wp-page.php file at the root of the WordPress site. It was responsible for pharma spam doorways…
Read the Post
  • Security Advisory

Fake FreeDNS Used to Redirect Traffic to Malicious Sites

  • Denis Sinegubko
  • July 29, 2016
During the last couple of days, we performed a few similar cleanup requests where sites occasionally redirected visitors to malicious sites that displayed ads, spam,…
Read the Post
Labs Note
  • Sucuri Labs

Malicious ShopSearcher Script

  • Denis Sinegubko
  • July 22, 2016
We see a strong trend in hacking ecommerce sites in order to hijack payment process and steal customers credit card details. During the last couple…
Read the Post
Search
Sucuri Sidebar Malware Removal to Signup Page
Sucuri Logo

Let’s Connect

Products
Website Firewall Website Security Platform WordPress Security Website Backups Hack Assistance Pricing
Solutions
DDoS Protection Malware Detection Malware Removal Malware Prevention Blacklist Removal SEO Spam Removal
USE CASES
Developers Ecommerce Agency Plans Enterprise Services HTTPS/2 Virtual Patching
Support
Knowledge Base SiteCheck Guides Research Labs Report Abuse Status Report
Company
About Sucuri Contact Blog Referral Partners Testimonials
Terms of Use Privacy Policy Do Not Sell My Personal Information Frequently Asked Questions

© 2025 GoDaddy Mediatemple, Inc., d/b/a Sucuri. All rights reserved.

back to top

'