Understanding Browser Trust Abuse: Exploiting Enterprise’s Most Trusted Interface

The useful part

Marie Mamaril, Intelligence Team The biggest change in browser-related threats is not a new flaw in browser software. Instead of breaking into the browser, they increasingly trick the people using it by exploiting the trust employees place in familiar browser experiences and workflows. As a result, any browser-enabled device can become a target, making browser patching alone insufficient to prevent these attacks.

How it works

• Browsers have become the primary gateway to cloud applications through which users authenticate enterprise identities, access sensitive information, and conduct daily business operations.
• The concentration of sensitive data makes the browser a high-value target, and threat actors have adapted their methods accordingly.
• This report examines four recent campaign types: fake software updates and application installation lures, Browser-in-the-Browser (BitB), ClickFix, and device code phishing.
• Rather than viewing these as separate attack techniques, the report presents a framework for understanding how threat actors exploit the person using the browser to steal credentials and install malware.
• Cofense Intelligence maintains a database of Active Threat Reports (ATR) within its ThreatHQ platform.

Example or evidence

• By mimicking legitimate login screens, software update prompts, authentication requests, and security checks that people see every day, threat actors persuade users to disclose credentials, grant access to...

Details worth keeping

These ATRs contain detailed analysis of the different Tactics, Techniques, and Procedures (TTPs), IOCs (indicators of compromise), and identification of various kinds of themed campaigns seen by the Threat Intelligence Analysts for both credential phishing and malware delivered via email.