Browser-Based Threat Report: Oct. 23

Browser-Based Threat Report

Week of October 23rd, 2023

ConcealBrowse is leveraged by teams across the world to combat weaponized URLs and Browser-Based Threats. The technology is constantly analyzing suspicious web artifacts to identify risks in the form of drive-by attacks, phishing portals, and other threats that materialize while browsing.

At Conceal, your digital safety is our utmost priority. Our weekly threat report for the week of October 23rd, 2023, unveils critical insights into the ever-evolving landscape of online threats.

The following report highlights recently detected sites that were deemed suspicious:

One of which, ConcealBrowse was able to identify one of these threats seven days before the other threat feeds.


SHA-256: 0b52c5338af355699530a47683420e48c7344e779d3e815ff9943cbfdc153cf2

This URL was detected by ConcealBrowse on October 17th, 2023, with it first being submitted to a handful of CTI feeds on October 15th, 2023. The webpage has since been taken down. This 17-day lapse between domain registration and page deletion is a long time given today’s threat environment. This highlights the importance of real-time analysis, which Conceal Browse enables. In this gap, only 8 security vendors, including Conceal Browse, flagged the page as suspicious.

The webpage the URL led its victims to was seen downloading an HTML file that has a historically bad reputation for various actions such as C2 node callouts.

The serving IP address continues to host malicious domains and has been flagged as malicious by two security vendors. Other webpages hosted on the server have been featured in Conceal’s weekly threat report previously.


SHA-256: d772f4ce3ff3a63d73da19acb3864fa4b3cf01807ac6c9322db27d60e2f4e7fa

This web page was detected by ConcealBrowse on October 12th, 2023, with it first being submitted to CTI feeds on October 19th, 2023. This showcases Conceal’s ability to identify risky webpages in real-time, even before CTI feeds report on them.

The delivered webpage included a captcha, prompting the end user to click on the “allow” button in the fake notification displayed in the top left (see below). This is a common tactic in which attackers present iFrames or transparent overlays on top of seemingly innocuous and common user interactive dialogue boxes. The transparent iFrame is clicked by the user because it is common. However, the overlay executes script that often initiates a download or even displays a login screen for credentials to be captured. This specific webpage is no longer active; however, users should be cautious when they see this tactic in the wild.


SHA-256: 6f5d8c5bf77786b84d00504f8a8f790a2261f49aef0c11327b611b9e1e91ab6e

This currently active URL was detected by ConcealBrowse on October 23rd, 2023. Although the webpage was first submitted to various CTI feeds on July 17th, 2018, it was resubmitted the morning of October 24th, meaning the page continues to deliver suspicious content.

The webpage has recently been delivering an HTML file that has conducted HTTP requests to various .ru domains. The serving IP address has been annotated in the past as a malicious C2 node and, more recently, has been identified as a cryptomining server by other intelligence services.


Valuable Outcomes

ConcealBrowse offers comprehensive protection against many sophisticated cyber threats, as recent threat reports exemplify. Our advanced threat detection capabilities have successfully flagged and quarantined malicious web pages, preventing users from falling victim to various cyber-attacks. Conceal remains dedicated to upholding the integrity of online interactions, constantly refining our detection algorithms and threat identification protocols to ensure proactive protection against emerging cyber threats. By integrating cutting-edge technology and a robust security infrastructure, we empower users to navigate the digital landscape with confidence, knowing that their online activities are shielded from potential harm.

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