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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.
Phishing Targets Ecommerce Checkout Pages Redirected
  • Ecommerce Security
  • Security Advisory
  • Website Malware Infections

Phishing Attacks Target Ecommerce Checkout Pages

  • Denis Sinegubko
  • July 19, 2016
Hunting credit card details on compromised ecommerce websites has become popular over the last two years. We have reported multiple cases in the past where…
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  • Security Advisory
  • Website Malware Infections

Realstatistics Malware Campaign Uses Fake Analytics Sites

  • Denis Sinegubko
  • July 8, 2016
In this post we’ll show you the tactics employed by the realstatistics malware campaign to make their injections seem less suspicious. The injection looks like…
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Labs Note
  • Sucuri Labs

Straightforward Backdoor Installer

  • Denis Sinegubko
  • July 4, 2016
Malware uses encryption, obfuscation and other tricks to prevent its detection so that the compromised sites stay infected for as long as possible. Quite often…
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  • Security Education
  • Web Pros
  • Website Security

Phishers Abuse Hosting Temporary URLs

  • Denis Sinegubko
  • June 7, 2016
Recently we told you how hackers use alternative domain names provided by web hosts to make their URLs look less suspicious. This time we’ll show…
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  • WordPress Security

Nulled WordPress Themes: Malvertising and Black Hat SEO

  • Denis Sinegubko
  • May 24, 2016
If you have been following our blog for some time, you know that we regularly warn about risks associated with the use of third-party software on…
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  • Website Malware Infections

New Wave of the Test0.com/Test5.xyz Redirect Hack

  • Denis Sinegubko
  • May 11, 2016
Last week we described the hack that randomly redirected site visitors either to a parked test0 .com domain or to malicious sites via the default7 .com…
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Labs Note
  • Sucuri Labs

Hiding Links Behind Punctuation Marks

  • Denis Sinegubko
  • May 9, 2016
In black hat SEO schemes, some links don’t have to have descriptive anchor keywords. For example, if their only purpose is help search engine crawlers…
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Labs Note
  • Sucuri Labs

Host’s Alternative Domain Names May Hide Malware

  • Denis Sinegubko
  • May 6, 2016
To make malicious injections look less suspicious, hackers like to use domains that look credible. It may be some typo domain like google-analystisc[.]com instead of…
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  • Website Malware Infections
  • WordPress Security

WordPress Redirect Hack via Test0.com/Default7.com

  • Denis Sinegubko
  • May 5, 2016
Update 9/14/16: We released a new guide that provides better instructions on how to clean a hacked WordPress site using the Free WordPress security plugin.…
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Labs Note
  • Sucuri Labs

Invisible WordPress Posts

  • Denis Sinegubko
  • April 19, 2016
A compromised website is perfect for placing black hat SEO doorways. Usually hackers either create such doorways as static files in deep subdirectories or use…
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  • Website Malware Infections

Website Ransomware – CTB-Locker Goes Blockchain

  • Denis Sinegubko
  • April 12, 2016
During the last couple of years, website ransomware has become one of the most actively developing types of malware. After infamous fake anti-viruses, this it the second…
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