Ransom:Win32/NetWalker!MTB pertains to a highly dangerous computer threat that was designed to block users from accessing their files. As a result, they have to pay the ransom demand in order to regain access to the files, which was encrypted by a sophisticated method. That is actually the intention of Ransom:Win32/NetWalker!MTB, to force victims into paying the ransom demand in exchange for decryption tool that is required in restoring the encrypted data back to original format.

How does it infect the computer?

Ransom:Win32/NetWalker!MTB spreads in the same manner as common computer viruses. Though, spam emails is observed as the primary channel that attackers are using to send out thousands of virus copies daily. Ransom:Win32/NetWalker!MTB approaches the computer as a suspicious email letter masquerading to be coming from legitimate company. Once recipient open the attached file, Ransom:Win32/NetWalker!MTB starts the attack sequence. It begins by dropping the virus code and then, communicates to a command-and-control server to received instructions.

Once Ransom:Win32/NetWalker!MTB have obtained the key and instructions from attackers, it begins to encrypt the files. Frequently, Ransom:Win32/NetWalker!MTB appends a string of suffix to the encrypted data. It also leaves a notice that is often in text, html, or desktop wallpaper.

How does this malware operate?

As soon as Ransom:Win32/NetWalker!MTB enter the target computer, it drops a copy of itself on System folder. Then, it creates a registry entry to automate the loading of the virus on each Windows start-up. On the occasion that Ransom:Win32/NetWalker!MTB is active, it begins to perform various malicious actions including the file encryption, which is the primary objective of this virus.

Technical Details
Virus Name: Ransom:Win32/NetWalker!MTB
Threat Type: Phobos Ransomware, Crypto-Virus
Similar Detections: AhnLab-V3 : Trojan/Win32.RansomCrypt.C4196467
ALYac : Generic.Ransom.Conti.57C16005
SecureAge APEX : Malicious
Arcabit : Generic.Ransom.Conti.57C16005
Avast : Win32:Malware-gen
Bkav : W32.AIDetectVM.malware1
CrowdStrike Falcon : Win/malicious_confidence_80% (D)
Cylance : Unsafe
Cynet : Malicious (score: 85)
DrWeb : Trojan.Encoder.32708
eGambit : Unsafe.AI_Score_98%
Elastic : Malicious (high Confidence)
Emsisoft : Generic.Ransom.Conti.57C16005 (B)
eScan : Generic.Ransom.Conti.57C16005
ESET-NOD32 : A Variant Of Win32/Filecoder.Conti.F
F-Secure : Heuristic.HEUR/AGEN.1103459
FireEye : Generic.mg.9e44305c3e6f66db
Fortinet : W32/Filecoder.NYJ!tr.ransom
GData : Generic.Ransom.Conti.57C16005
Jiangmin : Trojan.Encoder.yz
K7AntiVirus : Riskware ( 0040eff71 )
Kaspersky : Trojan-Ransom.Win32.Encoder.kbq
Malwarebytes : Ransom.FileCryptor
MAX : Malware (ai Score=80)
MaxSecure : Trojan.Malware.106607411.susgen
McAfee : Ransom-Conti!9E44305C3E6F
NANO-Antivirus : Virus.Win32.Gen.ccmw
Rising : Trojan.Generic@ML.90 (RDML:IA+VcMT1jUlY0zfBylkm5g)
SentinelOne : DFI – Suspicious PE
Sophos ML : Generic ML PUA (PUA)
TrendMicro-HouseCall : Ransom.Win32.CONTI.SMW
VBA32 : BScope.Trojan.Mansabo
Yandex : Trojan.Filecoder!hlxlNL62XGs
ZoneAlarm : Trojan-Ransom.Win32.Encoder.kbq

How to remove Ransom:Win32/NetWalker!MTB?

To totally remove Ransom:Win32/NetWalker!MTB from the computer and get rid of relevant viruses and trojans, please execute the procedures as stated on this page. Make sure that you have completely scanned the system with the suggested malware removal tools and virus scanners.

Quick Fix - Scan the PC with Combo Cleaner for Windows

Combo Cleaner is a trusted PC security and optimization tool equipped with a powerful virus and malware detection engine. This program can get rid of hazardous viruses like Ransom:Win32/NetWalker!MTB through this procedure.

1. Download the application from the following page:

2. Save the file to your preferred location.

3. Double-click the downloaded file CCSetup.exe and install with the default settings.

CC for Windows Installation

4. At the end of the setup process, click Finish to run Combo Cleaner.

5. The tool will update the signature file, please wait for this process to complete.

6. To begin checking for threats like Ransom:Win32/NetWalker!MTB, click on the Start Scan button. Wait for this scan to finish.

CC for Windows Start Scan

7. At the end of the scan process, click on Remove all threats to delete the Ransom:Win32/NetWalker!MTB virus, including all malicious objects from the computer.

Free features of Combo Cleaner for Windows include Disk Cleaner, Big Files finder, Duplicate files finder, and Uninstaller. To use antivirus, privacy scanner, and to delete identified threats, users have to upgrade to a premium version.

Please continue with the succeeding removal procedures if you are comfortable manually getting rid of the virus and malicious items linked to it.

Step 1 : Start Windows in Safe Mode With Networking

Windows 10 / 11 Guide

1. Click on the Windows logo and select the Power icon when options pop up.
2. Select Restart from the options while pressing the Shift key on the keyboard.
3. Choose an Option window will appear. Select the Troubleshoot button.
4. In next window, please choose the Advanced Option.
5. On the Advanced Option window, click on Startup Settings, and then, click the Restart button to reboot the computer.
6. When Windows boots in Startup Settings, press the function key F5 or number 5 on the keyboard.

A simpler alternative for Windows 10 users is to scan the computer with Microsoft Defender Offline. This will run a virus scan in the recovery environment.

Windows 8 Guide

1. Click the Windows Start icon in the lower left section of the screen.
2. Open the Search window and type Advanced in the field. It will open General PC Settings.
3. Click on Advanced Startup, and then click on the Restart Now button.
4. Once the computer starts in the Advanced Startup option menu, select Troubleshoot.
5. Next, click on Advanced Options to reveal the next section.
6. Click Startup settings, and then click the Restart button to boot the PC in Startup Settings.
7. Use function key F5 or number key 5 to Enable Safe Mode with Networking.

Step 2 : Run a virus scanner

To remove Ransom:Win32/NetWalker!MTB, we suggest that you scan the infected computer with this powerful virus removal tool. It can detect and get rid of Trojans, viruses, malware, and adware from the infected computer. To fully protect the computer against Ransom:Win32/NetWalker!MTB or similar attacks, you can activate Sophos to have real-time scanning and complete defense against all forms of threats.

1. Download Sophos Virus Removal Tool from the link below. Save the file on your computer where you can easily access it.

2. Once the download completes, browse the location of the file. Double-click to run the program and begin the install process.

3. On the first window of installation wizard, click Next to continue. Then, it will display the program’s License Agreement. You need to Accept the terms in order to proceed. If Windows prompts for User Account Control, please click Yes to proceed.

Screenshot of Sophos EULA Page

4. On succeeding windows, click Next or Continue to carry on with the installation. After completing the installation process, Launch Sophos Virus Removal Tool.

5. An internet connection is required when running this scanner in order to download important updates. Make sure that everything is up-to-date to effectively remove viruses like Ransom:Win32/NetWalker!MTB.

6. Click the Start Scanning button to  carry out the Scan. This will check the system for the presence of malicious objects, malware, and viruses. The tool reveals items that were found linked to Ransom:Win32/NetWalker!MTB and other suspicious entities. Be sure to remove all identified threats.

Screenshot of Sophos Virus Scan

After executing the above instructions, Ransom:Win32/NetWalker!MTB should have been completely removed from the computer. If there are still signs of infection or the computer is displaying unusual behaviors, please continue with the remaining procedures.

Step 3 : Double Check with Windows Security Apps

Microsoft Windows has a built-in security application that you can use to double-check if your computer is still infected with Ransom:Win32/NetWalker!MTB. For Windows 8 and 10/11 users, please run Windows Security. Users of Windows Vista and older versions can utilize Microsoft Security Essentials to remove the Ransom:Win32/NetWalker!MTB virus.

Windows 8 / 10 / 11 Instructions:

Windows Security is a free tool that was built to help you remove Ransom:Win32/NetWalker!MTB, viruses, and other malicious items from Windows 8 or Windows 10/11 systems. Follow these procedures to scan your computer with the tool:

1. Tap or click the Search charm, search for Windows Security, and then open the application.

Image of Windows Security Search

2. On the Home tab, click Virus and threat protection from the sidebar.

3. On the main window, click on Scan Options. Then, click on Full Scan button.

Image of Scan Options

4. Lastly, click on the Scan now button to start scanning for the presence of Ransom:Win32/NetWalker!MTB. The process may take a while to complete.

5. After the scan, Delete/Quarantine identified threats, whether they were relevant to Ransom:Win32/NetWalker!MTB or not. You may now restart Windows to complete the virus removal process.

How to protect the computer from Ransom:Win32/NetWalker!MTB?

The initial defense that comes to mind for any computer user is to install an anti-virus or anti-malware program. This move is sensible and probably the most practical way to protect the computer against a Ransom:Win32/NetWalker!MTB attack. Hence, keep in mind that having security software does not guarantee full protection. The majority of the prevention still lies in being cautious of users, and therefore, we are providing the following information as guidelines to protect the computer from virus infection.

Avoid Malicious Websites

There are enormous numbers of websites that were made for the primary purpose of spreading Ransom:Win32/NetWalker!MTB. Normally, these sites are involved in integrating malicious pop-up and browser hijacker, that will eventually cause further virus infections. Avoid such websites.

Ignore and Delete Phishing Emails

The mass-mailing of computer viruses gives the attackers the luxury of spreading their malicious code in just one send-off. This will arrive in the inbox as an email that appears to be from a legitimate organization. So, if you receive an unexpected email with a link or an attached file, better delete it immediately.

Do Not Click a Suspicious Link

Links from social media, forums, and blog sites are sometimes being utilized by attackers to drive web users to a malicious page that contains malicious code. Therefore, do not just click on any link, especially if it looks suspicious. Accidental access to the destination site may lead to a Ransom:Win32/NetWalker!MTB infection.

Be Careful When Downloading Files

Cracked software, serial key generators, and several freeware are seen as another method that spreads the Ransom:Win32/NetWalker!MTB virus. Avoid acquiring these types of applications, and if there is a need to download freeware or shareware, be sure to obtain it from the official website or trusted providers.

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