Is the biggest business enemy actually on the inside? Cybersecurity expert explains why insider threats are getting harder to control in browser-first working environments
As trusted members of an organization, employees can inadvertently or maliciously engage in risky cybersecurity behavior that is harder to detect and lead to data breaches that can cost millions of dollars to remediate. Andrius Buinovskis, a cybersecurity expert at NordLayer, says that as more companies adopt a browser-first approach, mitigating insider threats will become even more challenging due to the limited visibility security administrators have into employee activity within the browser.
Cybersecurity risks that originate from within a company are referred to as insider threats. The term encompasses all threats emerging from dangerous employee activity, whether intentional or not. Deliberate employee actions — such as selling confidential data to competitors or leaking private information out of spite — are also called malicious insider threats.
In their most recent annual report, IBM found that malicious insider threats were the cause of the most financially devastating data breaches in 2024, with an average cost of $4.99 million per incident. Buinovskis explains several reasons why these cybersecurity incidents can pack a hefty punch.
“Employees have access to incredibly sensitive data and resources which, when leaked, can have devastating consequences to a company’s reputation, result in GDPR fines, or be used for ransomware demands,” says Buinovskis. “Insider threats pose a significant danger due to their high impact, but they’re also harder to detect. Employees are trusted members of the organization, and their malicious actions can blend in with usual activity, potentially going unnoticed for months.”
Insider threats lurking in the browser
Buinovskis highlights that spotting malicious activity inside the organization has become even more challenging due to the rise of web-based software as a service (SaaS) applications.
“Consumer-grade browsers do not offer security admins a comprehensive view into employee activity, creating the perfect environment to carry out malicious activities without getting caught,” says Buinovskis. “As a result, the risk of data exfiltration, sharing credentials and confidential information, data theft, unauthorized web application use, and even sabotage by deleting or modifying critical information are all amplified in cloud-first, browser-heavy working environments.”
He explains that in traditional IT environments, these threats can be mitigated by ADR (automated detection and response) and XDR (extended detection and response), which observe network connections, file-based systems, and desktop applications. However, their observability of browser activity is very limited — for example, they cannot distinguish between normal work tasks and data exfiltration or which records were accessed or downloaded.
Additionally, consumer-grade browsers do not offer the possibility of enforcing centralized security controls. Consequently, employees can act as they please: download malicious browser extensions, screenshot or copy sensitive data, and share it with outside parties — all of which can lead to devastating data breaches.
“Companies are shifting to a browser-based working environment for greater efficiency and collaboration; however, as the reliance on the browser continues to grow, so will the cyber risks,” says Buinovskis. “This is especially true for small to medium businesses that might not even have had robust ADR and XDR solutions in the first place and now, consequently, have even less observability into their employee activity.”
Buinovskis explains that investing in cybersecurity awareness training for employees is the first step in mitigating unintentional insider threats. However, he emphasizes that businesses need to have comprehensive defenses in place to safeguard against employee error and malicious insiders.
“The longer malicious employee activity remains undetected, the greater its impact and the more extensive the resulting damage. This underscores the importance of robust observability and rapid incident response,” says Buinovskis. “Companies must prioritize strict access controls, strong user authentication, and continuous employee activity monitoring to mitigate insider threats effectively. For organizations operating in a web-based SaaS environment, leveraging the built-in security tools and enhanced observability of an enterprise browser is essential for comprehensive protection.”
ABOUT NORDLAYER
NordLayer offers reliable connection, protection, threat detection, and response for businesses needing strong network security. Built on NordVPN standards, NordLayer is a trusted cybersecurity platform that integrates easily with any network and technology stack, all with unmatched support. NordLayer is part of the cybersecurity powerhouse Nord Security. For more information: https://nordlayer.com/
KnowBe4 Deploys Additional Agentic Capabilities to Bolster Customers’ AI Defenses
Posted in Commentary with tags KnowBe4 on August 6, 2025 by itnerdKnowBe4 is proud to highlight the success of its customers in achieving remarkable transformations in their HRM programs. By leveraging KnowBe4’s HRM+ platform and advanced AI-driven products including AIDA (Artificial Intelligence Defense Agents), customers like First Community Credit Union have reduced their Phish-prone Percentage (PPP) to a near-perfect one percent.
AIDA combines human expertise with advanced AI to give organizations a clear view of their human risk and the tools to reduce it. Powered by the SmartRisk Agent, it utilizes 316 indicators influencing 37 factors across seven knowledge areas. It automates targeted actions based on each organization’s unique threat landscape, helping security teams work faster, train smarter, and strengthen defenses. KnowBe4’s agentic AI capabilities are rooted in having the industry’s largest data set of simulated phishing and people-centric cybersecurity defense measures collected from over 13 million global users and 15 years.
Bryan Perkola, senior vice president of information security at First Community Credit Union in Houston, shared in a video how KnowBe4 has been instrumental in reshaping their approach to security awareness.
In addition to AIDA, PhishML Insights is now available as part of PhishER+. This AI capability enables InfoSec teams to better understand emerging attack patterns by setting customized confidence thresholds for email threat classification while receiving detailed explanations of why each message was tagged as clean, spam, or a threat.
To hear more customer success stories, visit the KnowBe4 testimonials website or visit KnowBe4 at booth number 1661 at Black Hat USA August 6-7, 2025.
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