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How to uninstall WebMonitor RAT?

Also Known As: WebMonitor Remote Administration Tool
Type: Trojan
Distribution: Low
Damage level: Severe

WebMonitor removal guide

What is WebMonitor?

Remote access/administration tool (RAT) is a type of software that allows users to control other computers (that have a RAT installed on them) remotely. Software of this type can be used legitimately (for example, to provide remote technical support). However, it is common that cybercriminals use RATs too. They use RATs to access sensitive information, install malware, and for other malicious purposes. WebMonitor is a RAT developed by a company named Revcode. It is advertised as a legitimate remote administration tool that allows users to remotely control computers via a web browser. Although, it is known that WebMonitor is classified as malicious software by a number of antivirus companies because it has features used mainly by cybercriminals. Also, it is known that WebMonitor advertised on hacker forums. This RAT is compatible with Windows and Android operating systems.

WebMonitor malware

WebMonitor is for sale on its official website. It has three subscription plans: €149,99 per year, €99,99 per six months, and €64,99 per three months. WebMonitor is popular among cybercriminals because it is compatible with software that can encrypt, obfuscate and manipulate malware to increase the chance that antivirus programs would not detect it. Also, WebMonitor can stop the operating system or software installed on it (e.g., antivirus) from notifying users about its presence. Moreover, it is known that WebMonitor has been bundled with Zoom installer. In other words, cybercriminals used the installer for Zoom to trick users into installing WebMonitor on their computers. It is important to mention that WebMonitor is not the only software that was (or still is) distributed via installers for the Zoom application. Either way, Zoom installers bundled with WebMonitor or any other software do not come from the Zoom app's official download sources (such as Zoom's Download Center, Apple App Store, or Google Play Store).

It is known that the WebMonitor RAT can be used to log keystrokes (record keyboard input), access and view screen and webcam, microphone, browse and manage hard drives, download, upload, execute, delete, rename, and edit files (and do the same on any connected external devices). It can also be used to recover passwords from mail clients, messengers, network and the system, track web browsing activities, collect browsing history, image cache, list of installed add-ons, get the list of programs installed on the operating system and remove those programs. Like many other RATs, WebMonitor also can be used to run commands via Command Prompt and PowerShell, manage system processes, add, edit or remove registry entries, and control or monitor the system in other ways. As mentioned in the first paragraph, most cybercriminals use RATs to infect computers with other malware (e.g., ransomware, Trojans), or to steal personal information. WebMonitor RAT can be used to do this and more. It is important to mention that RATs are mainly used to steal data such as credit card details and other banking-related information, login credentials (usernames, email addresses, passwords), social security numbers, and other personal details. Therefore, if there is any reason to suspect that WebMonitor is installed on the operating system (and it was not installed on purpose), then it should be removed as soon as possible.

Threat Summary:
Name WebMonitor Remote Administration Tool
Threat Type Trojan, password-stealing virus, banking malware, spyware.
Detection Names Avast (Win32:RATX-gen [Trj]), BitDefender (Trojan.GenericKD.36643385), ESET-NOD32 (A Variant Of MSIL/Kryptik.AAHN), Kaspersky (HEUR:Trojan.MSIL.Taskun.gen), Microsoft (Trojan:MSIL/Stealer.MS!MTB), Full List (VirusTotal)
Malicious Process Name(s) Brett Tech OS (its name may vary)
Symptoms Trojans are designed to stealthily infiltrate the victim's computer and remain silent, and thus no particular symptoms are clearly visible on an infected machine.
Distribution methods Infected email attachments, malicious online advertisements, social engineering, software 'cracks'.
Damage Stolen passwords and banking information, identity theft, the victim's computer added to a botnet.
Malware Removal (Windows)

To eliminate possible malware infections, scan your computer with legitimate antivirus software. Our security researchers recommend using Malwarebytes.
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In conclusion, cybercriminals could monetize WebMonitor by installing a cryptocurrency miner, ransomware, some banking Trojan or other malware, stealing personal accounts, identities, using stolen data to make fraudulent transactions, purchases, spreading malware on other devices, and so on. It is worthwhile to mention that not all RATs are legitimate (or at least advertised as such). Malicious RATs are called Remote Administration Trojans. Here are examples of malicious RATs: Xtreme, Spectre, and DarkCrystal.

How did WebMonitor infiltrate my computer?

It is known that cybercriminals have used or still using an unofficial Zoom installer to distribute WebMonitor. As a rule, unofficial installers are distributed using unofficial websites, Peer-to-Peer networks (e.g., torrent clients, eMule), certain freeware download pages, free file hosting sites, and other shady sources for downloading files programs. It is also known that cybercriminals deliver WebMonitor using phishing emails. Research shows that they use emails disguised as letters from Empros Lines Shipping Company regarding an overdue invoice. Those emails have an archive file attached to them which contains an executable file designed to install WebMonitor. Although, it is likely that there are different phishing emails used to distribute WebMonitor. Other variants could be disguised as letters from different companies regarding different matters and contain some Microsoft Office, PDF document, JavaScript file, or another file.

How to avoid installation of malware?

Attachments and website links in irrelevant emails received from unknown, suspicious addresses/senders should not be opened. It is common that emails of this kind contain malicious links or attachments. Software and files should be downloaded from official websites and through direct links. Other sources, tools can be and often are used to distribute malicious files/programs. Installed software has to be updated with tools or functions that the official developers provide. If an installed program is not free and needs to be activated, it should be activated properly. It is never save to update or activate software with third-party tools, they tend to be malicious. Also, it is not legal to activate licensed software with tools of this kind ('cracking' tools), neither it is legal to use pirated software. One more way to computers safe is to regularly scan them using a reputable antivirus or anti-spyware suite and always eliminate detected threats as soon as possible. Installed security solution should be up to date. If you believe that your computer is already infected, we recommend running a scan with Malwarebytes for Windows to automatically eliminate infiltrated malware.

Phishing email used to deliver WebMonitor:

webmonitor rat phishing email used to deliver webmonitor

Text in this email:

Subject: RE: OVERDUE INVOICE

Why haven't you remitted the payment for the Invoice in attachment. This  invoice is long overdue.

Brgds/Greg Kontouzoglou

Empros Lines - Liner Dpt

email: gkontouzoglou@emproslines.com

dir: +30 210 8125535

mob: +30 694 898 0698

skype: greg.kontouzoglou


CONFIDENTIALITY. This email and any attachments are confidential and may also be legally privileged. It is intended solely for the stated addressee(s). If you are not the addressee, you must not disclose the contents to another person or use this email for any purpose whatsoever. Instead, please notify the sender by return email and delete this email (including any attachments) from your computer system

------------------------------------------------------

EMPROS LINES SHIPPING COMPANY S.A.

Screenshot of the promotion page for WebMonitor:

webmonitor rat download page

Screenshot of WebMonitor running as "Brett Tech OS" (its name may vary) in Task Manager:

webmonitor rat running in task manager as brett tech os

Instant automatic malware removal: Manual threat removal might be a lengthy and complicated process that requires advanced computer skills. Malwarebytes is a professional automatic malware removal tool that is recommended to get rid of malware. Download it by clicking the button below:
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How to remove malware manually?

Manual malware removal is a complicated task - usually it is best to allow antivirus or anti-malware programs to do this automatically. To remove this malware we recommend using Malwarebytes for Windows. If you wish to remove malware manually, the first step is to identify the name of the malware that you are trying to remove. Here is an example of a suspicious program running on a user's computer:

malicious process running on user's computer sample

If you checked the list of programs running on your computer, for example, using task manager, and identified a program that looks suspicious, you should continue with these steps:

manual malware removal step 1Download a program called Autoruns. This program shows auto-start applications, Registry, and file system locations:

screenshot of autoruns application

manual malware removal step 2Restart your computer into Safe Mode:

Windows XP and Windows 7 users: Start your computer in Safe Mode. Click Start, click Shut Down, click Restart, click OK. During your computer start process, press the F8 key on your keyboard multiple times until you see the Windows Advanced Option menu, and then select Safe Mode with Networking from the list.

Safe Mode with Networking

Video showing how to start Windows 7 in "Safe Mode with Networking":

Windows 8 users: Start Windows 8 is Safe Mode with Networking - Go to Windows 8 Start Screen, type Advanced, in the search results select Settings. Click Advanced startup options, in the opened "General PC Settings" window, select Advanced startup. Click the "Restart now" button. Your computer will now restart into the "Advanced Startup options menu". Click the "Troubleshoot" button, and then click the "Advanced options" button. In the advanced option screen, click "Startup settings". Click the "Restart" button. Your PC will restart into the Startup Settings screen. Press F5 to boot in Safe Mode with Networking.

Windows 8 Safe Mode with networking

Video showing how to start Windows 8 in "Safe Mode with Networking":

Windows 10 users: Click the Windows logo and select the Power icon. In the opened menu click "Restart" while holding "Shift" button on your keyboard. In the "choose an option" window click on the "Troubleshoot", next select "Advanced options". In the advanced options menu select "Startup Settings" and click on the "Restart" button. In the following window you should click the "F5" button on your keyboard. This will restart your operating system in safe mode with networking.

windows 10 safe mode with networking

Video showing how to start Windows 10 in "Safe Mode with Networking":

 

manual malware removal step 3Extract the downloaded archive and run the Autoruns.exe file.

extract autoruns.zip and run autoruns.exe

manual malware removal step 4In the Autoruns application, click "Options" at the top and uncheck "Hide Empty Locations" and "Hide Windows Entries" options. After this procedure, click the "Refresh" icon.

Click 'Options' at the top and uncheck 'Hide Empty Locations' and 'Hide Windows Entries' options

manual malware removal step 5Check the list provided by the Autoruns application and locate the malware file that you want to eliminate.

You should write down its full path and name. Note that some malware hides process names under legitimate Windows process names. At this stage, it is very important to avoid removing system files. After you locate the suspicious program you wish to remove, right click your mouse over its name and choose "Delete".

locate the malware file you want to remove

After removing the malware through the Autoruns application (this ensures that the malware will not run automatically on the next system startup), you should search for the malware name on your computer. Be sure to enable hidden files and folders before proceeding. If you find the filename of the malware, be sure to remove it.

searching for malware file on your computer

Reboot your computer in normal mode. Following these steps should remove any malware from your computer. Note that manual threat removal requires advanced computer skills. If you do not have these skills, leave malware removal to antivirus and anti-malware programs. These steps might not work with advanced malware infections. As always it is best to prevent infection than try to remove malware later. To keep your computer safe, install the latest operating system updates and use antivirus software.

To be sure your computer is free of malware infections, we recommend scanning it with Malwarebytes for Windows.

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About the author:

Tomas Meskauskas

Tomas Meskauskas - expert security researcher, professional malware analyst.

I am passionate about computer security and technology. I have an experience of over 10 years working in various companies related to computer technical issue solving and Internet security. I have been working as an author and editor for pcrisk.com since 2010. Follow me on Twitter and LinkedIn to stay informed about the latest online security threats. Contact Tomas Meskauskas.

PCrisk security portal is brought by a company RCS LT. Joined forces of security researchers help educate computer users about the latest online security threats. More information about the company RCS LT.

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Malware activity

Global malware activity level today:

Medium threat activity

Increased attack rate of infections detected within the last 24 hours.

QR Code
WebMonitor Remote Administration Tool QR code
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