Checking the site for viruses

Modified on Sat, 11 May 2024 at 09:36 PM

The reason for the appearance of viruses on a website can be vulnerabilities in content management systems, plugins and templates (especially if unofficial hacked versions are used), errors in the code, website settings, and simple passwords.


Infection is not always known immediately. But there are signs that make it necessary to check the site for viruses:

  • Search engine tags about the danger of a site.

  • Redirections to third-party resources when navigating through website pages.

  • A drop in traffic and a decline in rankings in search engines.

  • A sharp increase in traffic (usually due to the appearance of fraudulent pages on the site).

  • The appearance of extraneous advertising blocks, banners or pop-ups.

  • Extraneous content, problems with the site functionality.

  • Pages take a long time to load, or errors occur or empty “white” pages appear.

  • The emergence of new catalogs and websites.

  • High load on the server.

  • Complaints about fraudulent activity or spam from the hosting provider.


There are many services for checking a website for viruses, but several that are effective include:


VirusTotal is a free service that does not require registration. To check a website or file for viruses, more than 50 constantly updated anti-virus scanners are used, which can detect almost all types of malicious software.

  • Go to the official Virustotal website.

  • Select "URL".

  • Enter a link to the site you are checking.

As can be seen from the example, one of the antiviruses detected malicious code. It is worth understanding that this service checks the contents of HTML, JavaScript and CSS code and, based on this, makes a decision about infection.

Moreover, among the site files there may be a separate PHP script through which attackers will send fraudulent emails or create fake pages to steal bank card data. Based on this, verification must be carried out in different ways.


You can check your website for viruses online using Kaspersky Lab’s tool. The Kaspersky VirusDesk service allows you to check sites based on the Kaspersky Security Network for free and without registration.

But it should be taken into account that this service also checks only HTML, JavaScript and CSS code, similar to the VirusTotal service.

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