Cybersecurity analysts have identified a phishing campaign that can quietly hand control of a Windows computer to attackers after a single click. The scam appears as a routine update notice for Google Meet, but the prompt is fraudulent and redirects victims into a device management system controlled by threat actors.
Unlike many phishing schemes, the technique does not steal passwords, download obvious malware, or display clear warning signs. Instead, the attack relies on convincing users to interact with a page that imitates a standard software update message.
A convincing but fake update message
The deceptive webpage tells visitors they must install the latest version of Meet in order to continue using the service. The design closely resembles a legitimate update notification and uses familiar colors and branding that many users associate with Google products.
However, both the “Update now” button and the “Learn more” link do not connect to any official Google resource. Instead, they activate a special Windows deep link known as ms-device-enrollment:.
This feature is a built-in Windows mechanism designed for corporate environments. IT administrators commonly use it to send employees a link that allows a computer to be enrolled in a company’s device management system with minimal effort. In the attack campaign, the same capability is redirected to infrastructure operated by the attacker.
How the enrollment process begins
Windows enrollment links such as ms-device-enrollment: are commonly used in corporate environments where organizations need to configure large numbers of laptops quickly. The link automatically opens Windows settings and connects the device to an enterprise management server.
Once enrolled, the device becomes part of a management framework that allows administrators to deploy software updates, enforce security policies, and manage system configurations remotely.
Attackers exploit this workflow because users are accustomed to seeing this setup process when joining corporate networks, making it appear legitimate.
When a victim clicks the link, Windows immediately bypasses the browser and opens the operating system’s “Set up a work or school account” dialog. This is the same interface that appears when an organization configures a new employee laptop.
The enrollment request arrives with several fields already filled in. The username displayed is collinsmckleen@sunlife-finance.com, a domain designed to resemble the financial services firm Sun Life Financial. Meanwhile, the server connection is preconfigured to an endpoint hosted at tnrmuv-api.esper[.]cloud, which is part of infrastructure operated by Esper.
The attacker’s objective is not to impersonate the victim’s account perfectly. Instead, the goal is to persuade the user to continue through the legitimate Windows enrollment process. Even if only a small portion of targeted users proceed, that is enough for attackers to gain access to some systems.
What attackers gain after enrollment
If the victim clicks Next and completes the setup wizard, the computer becomes registered with a remote Mobile Device Management (MDM) server.
MDM platforms are commonly used by organizations to manage employee devices. Once a device joins such a system, administrators can remotely install or remove applications, modify operating system settings, access stored files, lock the device, or completely erase its contents.
Because the commands come from a legitimate management platform rather than a malicious program, the operating system performs the actions itself. As a result, there may be no suspicious malware process running on the machine.
The infrastructure used in this campaign relies on Esper, a legitimate enterprise management service that many companies use to control corporate hardware.
Further analysis of the malicious link shows encoded configuration data embedded in the server address. When decoded, the data reveals two identifiers associated with the Esper platform: a blueprint ID that determines which management configuration will be applied and a group ID that specifies the device group the computer will join once enrolled.
Abuse of legitimate features
Both the Windows enrollment handler and the Esper management service are functioning exactly as designed. The attacker’s tactic simply redirects these legitimate tools toward unsuspecting users.
Because no malicious software is delivered and no login credentials are requested, the attack can be difficult for security tools to detect. The enrollment prompt displayed to the user is an authentic Windows system dialog rather than a fake webpage. This means typical browser warnings or email filters that look for credential-stealing forms may not flag the activity.
Additionally, the command infrastructure operates on a trusted cloud-based platform, making domain reputation filtering less effective. Security specialists warn that many traditional detection tools are not designed to recognize situations where legitimate operating system features are misused to gain control of a system.
This technique reflects a broader trend in cybercrime. Increasingly, attackers are abandoning conventional malware and instead exploiting built-in operating system capabilities or legitimate cloud services to carry out their operations.
Steps to take if you interacted with the page
Users who believe they may have clicked the fake update prompt should first check whether their device has been enrolled in an unfamiliar management system.
On Windows computers, this can be done by navigating to Settings → Accounts → Access work or school. If an unfamiliar entry appears, particularly one associated with domains such as sunlife-finance or esper, it should be selected and disconnected immediately.
Anyone who clicked the “Update now” link on the malicious site and proceeded through the enrollment wizard should treat the computer as potentially compromised. Running a current anti-malware scan is recommended to determine whether the management server deployed additional software after enrollment.
For organizations, administrators may also want to review device management policies. Endpoint management platforms such as Microsoft Intune allow companies to restrict which MDM servers corporate devices are permitted to join. Implementing such restrictions can reduce the risk of unauthorized device enrollment in similar attacks.
Security researchers have warned that misuse of device management systems can be particularly dangerous because they grant deep administrative control over enrolled devices.
According to analysts from Gartner, enterprise device management platforms often have privileged system access comparable to local administrators, allowing them to modify system policies, install applications, and control security settings remotely.
When such privileges fall into the wrong hands, attackers can effectively operate the device as if they were legitimate administrators.
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