Microsoft is actively testing a new security feature in its Edge browser designed to provide faster protection against technical support scams. The feature, identified as the “New SmartScreen client for scareware,” integrates a client-side sensor directly into the browser to detect and block malicious scareware pages more rapidly.
This enhancement is part of the existing Microsoft Defender SmartScreen service, which helps protect users from phishing and malware websites. The introduction of a client-side component marks a significant update to its detection capabilities for a specific type of online fraud.
How the Scareware Sensor Works
The new scareware sensor operates locally within the Microsoft Edge browser to identify patterns and behaviors commonly associated with technical support scams. When the sensor flags a webpage as suspicious, it sends a signal to the Microsoft Defender SmartScreen service. SmartScreen then conducts a full URL reputation check to confirm the threat.
If the page is verified as a scam, it is blocked for the user. This client-side detection process is faster than the traditional method, which relies on updating and distributing server-side blocklists. By identifying threats directly in the browser, Microsoft can respond to new scam campaigns almost immediately, reducing the window of exposure for users.
Targeting Social Engineering Tactics
The primary target of this new sensor is the persistent threat of tech support scams. These scams often employ social engineering tactics, such as displaying fake virus warnings, browser-locking pop-ups, and alarming audio messages. The goal is to deceive users into believing their computer is infected or compromised, pressuring them to call a fraudulent support number and pay for unnecessary services.
The “New SmartScreen client for scareware” is currently being deployed to a limited group of users on the Microsoft Edge Stable channel for testing and evaluation before a wider release.
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