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Krasimir Konov

63 posts
Krasimir Konov is Sucuri's Malware Analyst who joined the company in 2014. Krasimir's main responsibilities include analyzing malicious code, signature creation and documentation of malware. His professional experience covers more than 10 years in the IT field, with nine years involved in IT/cyber security. When he’s not analyzing malware or writing Labs notes, you might find Krasimir riding his motorcycle and traveling the world. Connect with him on Twitter or LinkedIn.
Backdoor Targets FreePBX Asterisk Management Portal
  • Sucuri Labs
  • Website Malware Infections
  • Website Security

Backdoor Targets FreePBX Asterisk Management Portal 

  • Krasimir Konov
  • December 15, 2022
Written in PHP and JavaScript, FreePBX is a web-based open-source GUI that manages Asterisk, a voice over IP and telephony server. This open-source software allows…
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How to Securely Shop With Your Credit Card: Use a Virtual Card & Check for Skimmers
  • Ecommerce Security
  • Security Education

How to Securely Shop With Your Credit Card: Use a Virtual Card & Check for Skimmers

  • Krasimir Konov
  • December 8, 2022
The convenience and ease of online transactions has drawn a tremendous number of users to online ecommerce storefronts. And during the pandemic, many consumers switched…
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The importance of website logs for security and accountability
  • Ecommerce Security
  • Website Security
  • WordPress Security

The Importance of Website & Server Logs

  • Krasimir Konov
  • August 11, 2022
Have you ever looked at your server or website logs and realized that they make absolutely no sense to you? Or thought that logs just…
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DHL Phishing Uses Telegram Bot for Exfiltration
  • Website Malware Infections
  • Website Security

DHL Phishing Page Uses Telegram Bot for Exfiltration

  • Krasimir Konov
  • July 26, 2022
One of the quickest ways for an attacker to harvest financial data, credentials, and sensitive personal information is through phishing. These social engineering attacks can…
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Malicious C&C Script Used to Manage Botnet
  • Website Malware Infections
  • Website Security
  • WordPress Security

Infected WordPress Site Reveals Malicious C&C Script

  • Krasimir Konov
  • July 12, 2022
Bitcoin prices are down 60% year to date, trading far from the all-time highs of $69,000 seen last November. Some altcoins have plummeted even farther…
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Massive JavaScript Injection Campaign Redirects to Ads
  • Website Malware Infections
  • Website Security
  • WordPress Security

Massive WordPress JavaScript Injection Campaign Redirects to Ads 

  • Krasimir Konov
  • May 11, 2022
Our remediation and research teams regularly find malicious redirects on client sites. These infections automatically redirect site visitors to third-party websites with malicious resources, scam…
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Labs Note
  • Security Education
  • Sucuri Labs
  • Website Security
  • WordPress Security

The Dangers of Using Abandoned Plugins & Themes

  • Krasimir Konov
  • December 17, 2020
It’s not very often that we see abandoned components being used on a website — but when we do, it’s most often because the website…
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Labs Note
  • Sucuri Labs
  • Website Malware Infections
  • Website Security

Malware Dropper Takes Advantage of COVID-19 Pandemic

  • Krasimir Konov
  • December 10, 2020
Since April, our team has been tracking the spread of a PHP malware dropper. It’s impacting unsuspecting victims who thought they were downloading a mapping…
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Labs Note
  • Security Education
  • Sucuri Labs
  • Website Malware Infections
  • Website Security

Legacy Mauthtoken Malware Continues to Redirect Mobile Users

  • Krasimir Konov
  • November 4, 2020
During malware analysis, we regularly find variations of this injected script on various compromised websites: . The variable “_0x446d” assigns hex encoded strings in different…
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Labs Note
  • Drupal Security
  • Joomla Security
  • Magento Security
  • Sucuri Labs
  • Website Malware Infections
  • Website Security
  • WordPress Security

Backdoor Shell Dropper Deploys CMS-Specific Malware

  • Krasimir Konov
  • October 6, 2020
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…
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Labs Note
  • Security Education
  • Sucuri Labs
  • Website Security

Malicious Pop-up Redirects Baidu Traffic

  • Krasimir Konov
  • September 29, 2020
Malicious pop-ups and redirects have become two extremely common techniques used by attackers to drive traffic wherever they want. \ During a recent investigation, we…
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