Beware of Fake Zoom Installers that Infects Computers with WebMonitor RAT

Due to coronavirus pandemic, many companies around the world asked employees to work from home, which increases the usage of video conferencing apps.

Researchers from Trend Micro observed a new campaign that leverages several popular messaging apps including Zoom.

WebMonitor RAT Campaign

In the new campaign, attackers repackaged the legitimate zoom installer with WebMonitor RAT. The infection starts with downloading the malicious file ZoomIntsaller.exe from malicious sources.

While running the malicious file it drops a copy of itself named Zoom.exe and to execute the Zoom.exe it opens the process notepad.exe.

Once executed it connects with the remote C2 server and executes following commands.

• Add, delete, and change files and registry information
• Close connections
• Get software and hardware information
• Get webcam drivers/snapshot
• Record audio and log keystrokes
• Start, suspend, and terminate processes and services
• Start/stop screen stream
• Start/stop Wireless Access Point

It also drops the file Zoom.vbs in the startup folder to enable automatic execution at the time of system startup.

The process will get terminated itself if any security tools found running on the computer or it gets executed in the virtual environment or it finds files in name Malware, Sample, and Sandbox.

Malware is capable of gathering following information

• Battery Information
• Computer Information
• Desktop Monitor Information
• Memory Information
• Network Adapter Configuration
• OS Information
• Processor Information
• Video Controller Information

Recently a new phishing campaign aimed to steal employees’ login credentials by impersonating Microsoft Teams’ notifications.

Also, a new zoom phishing campaign observed the last month-end asking recipients to join a zoom meeting that threatens employees that their contracts will be either suspended or terminated.

Cybercriminals continue to use the Coronavirus outbreak to launch various attacks such as malware, phishing, fraud, and disinformation campaigns.

In the current situation, most of the organization has been closed and the employees are provided with options to work from home. So the RDP and the video communication platforms are heavily targeted by attackers.

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