How to remove Nemty Special Edition ransomware from your system?

Also Known As: Nemty Special Edition virus
Distribution: Low
Damage level: Severe

Nemty Special Edition ransomware removal instructions

What is Nemty Special Edition?

Nemty Special Edition is the name of a malicious program, it is a new variant of the NEMTY REVENUE 3.1 ransomware. Its discovery is credited to Anti-malware vigilante. It encrypts data and demands payment for the decryption. During the encryption process, all affected files are appended with an extension, consisting of the word "NEMTY", the underscore symbol and a random character string - ".NEMTY_[random_string]". For example, a file originally titled "1.jpg" would appear as something similar to "1.jpg.NEMTY_GAGK0TW"" - following encryption. After this process is complete, a ransom note - "NEMTY_[random_string]-DECRYPT.txt" is created. The same malicious executable file, used to proliferate Nemty Special Edition also injects Vidar trojan. One of the known distribution methods of this ransomware is via spam campaigns, mainly targeting South Korean users.

The ransom-demanding message ("NEMTY_[random_string]-DECRYPT.txt") informs victims that their data has been encrypted. The cryptographic algorithms used to encrypt the files are specified as AES-128-CTR and RSA-2048. The note states that there are no free ways to recover the data. To learn how to decrypt it, users are to establish contact with the cyber criminals behind the attack. Unfortunately, in many cases of ransomware infections, without interference of the individuals responsible - decryption is impossible. It may be, if the malware is still in development and/or has significant flaws. Whatever the case, it is expressly advised against communicating with and/or paying cyber criminals. Since often, despite meeting the ransom demands - victims do not receive the necessary tools/software to decrypt their files. Hence, they not only experience financial loss but their data also remains encrypted - essentially, worthless. To prevent Nemty Special Edition from further encryptions, it must be removed from the operating system. However, removal will not restore already affected files. The sole viable solution is recovering the data from a backup, if one was made before the infection and was stored in a different location.

Screenshot of a message encouraging users to pay a ransom to decrypt their compromised data:

Nemty Special Edition decrypt instructions (NEMTY_[random_string]-DECRYPT.txt)

Zemblax.HaCk0day0 and Himynameisransom are a few examples of other ransomwares. These programs operate by encrypting files and demanding payment for the decryption. The main differences in-between them are: the cryptographic algorithm they use (symmetric or asymmetric) and the ransom size. The demanded sums typically range from three to four digits in USD. Cyber criminals usually prefer digital currencies (e.g. cryptocurrencies, pre-paid vouchers, etc.), due to transactions of them being difficult/impossible to trace. To avoid permanent data loss, it is highly recommended to keep backups in unplugged storage devices and/or remote servers (ideally, in several separate locations).

How did ransomware infect my computer?

Nemty Special Edition ransomware has been observed being distributed via spam campaigns, most notably ones targeting South Korean users. The term "spam campaign" describes a large scale operation, during which deceptive/scam emails are sent by the thousand. These letters contain virulent files, as attachments or download links. Malicious files can be in various files (e.g. archive and executable files, PDF and Microsoft Office documents, JavaScript, etc.); when they are executed, run or otherwise opened - it triggers the infection process (i.e. initiates malware download/installation). Other common malware proliferation modes include trojans, illegal activation tools ("cracks"), illegitimate updates and untrustworthy download channels. Trojans are malicious programs, some types of which can cause chain infections. Rather than activate licensed product, "cracking" tools can download/install malware. Fake updaters cause infections by abusing flaws of outdated products and/or by simply installing malicious software instead of the promised updates. Malicious content can be inadvertently downloaded from untrustworthy sources, such as: unofficial and free file-hosting sites, P2P sharing networks (BitTorrent, eMule, Gnutella, etc.) and other third party downloaders.

Threat Summary:
Name Nemty Special Edition virus
Threat Type Ransomware, Crypto Virus, Files locker
Encrypted Files Extension .NEMTY_[random_string]
Ransom Demanding Message NEMTY_[random_string]-DECRYPT.txt
Cyber Criminal Contact spaxl425@protonmail.com and spaxl425@aol.com
Detection Names DrWeb (Trojan.DownLoader33.39179), BitDefender (Trojan.GenericKDZ.67001), ESET-NOD32 (A Variant Of Win32/GenKryptik.EJYZ), Kaspersky (Trojan.Win32.Zenpak.aaxn), Full List Of Detections (VirusTotal)
Rogue Process Name 전산 및 비전산자료 보존 요청서_20200506(꼭 자료 보존해주세요)1 (process name may vary)
Symptoms Cannot open files stored on your computer, previously functional files now have a different extension (for example, my.docx.locked). A ransom demand message is displayed on your desktop. Cyber criminals demand payment of a ransom (usually in bitcoins) to unlock your files.
Distribution methods Infected email attachments (macros), torrent websites, malicious ads.
Damage All files are encrypted and cannot be opened without paying a ransom. Additional password-stealing trojans and malware infections can be installed together with a ransomware infection.
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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How to protect yourself from ransomware infections?

Suspicious and/or irrelevant emails should not be opened, especially ones received from suspect or unknown senders. Any attachments or links present in dubious mail - must never be opened, as doing so can result in a high-risk infection. It is recommended to only use official and verified download channels. Additionally, all products have to be activated and updated with functions/tools, provided by genuine developers. Illegal activation tools ("cracks") and third party updaters are advised against use, as they are often used to distribute malicious programs. To ensure device and user safety, it is paramount to have a dependable anti-virus/anti-spyware installed. This software must be kept up-to-date, used to perform regular system scans and to remove detected threats and issues. If your computer is already infected with Nemty Special Edition, we recommend running a scan with Malwarebytes for Windows to automatically eliminate this ransomware.

Text presented in Nemty Special Edition ransomware's text file ("NEMTY_[random_string]-DECRYPT.txt"):

NEMTY SPECIAL EDITION

 

We are sorry to inform... but your files were encrypted.
Don't try to find free solution... You will only waste your time!
We use strong encryption (AES-128-CTR & RSA-2048)

 

Contacts:

e-mail(main):    spaxl425@protonmail.com
e-mail(reserve): spaxl425@aol.com

 

KEY:
-

Screenshot of files encrypted by Nemty Special Edition ransomware (".NEMTY_[random_string]" extension):

Files encrypted by Nemty Special Edition ransomware (.NEMTY_[random_string] extension)

Screenshot of Nemty Special Edition ransomware's process on Windows Task Manager ("전산 및 비전산자료 보존 요청서_20200506(꼭 자료 보존해주세요)1"):

Nemty Special Edition ransomware process on Task Manager (process name: 전산 및 비전산자료 보존 요청서_20200506(꼭 자료 보존해주세요)1)

Appearance of the email used to distribute Nemty Special Edition ransomware (GIF):

Nemty Special Edition ransomware distributing email gif

Nemty Special Edition ransomware removal:

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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Quick menu:

Step 1

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":

Step 2

Log in to the account infected with the Nemty Special Edition virus. Start your Internet browser and download a legitimate anti-spyware program. Update the anti-spyware software and start a full system scan. Remove all entries detected.

If you cannot start your computer in Safe Mode with Networking, try performing a System Restore.

Video showing how to remove ransomware virus using "Safe Mode with Command Prompt" and "System Restore":

1. During your computer start process, press the F8 key on your keyboard multiple times until the Windows Advanced Options menu appears, and then select Safe Mode with Command Prompt from the list and press ENTER.

Boot your computer in Safe Mode with Command Prompt

2. When Command Prompt mode loads, enter the following line: cd restore and press ENTER.

system restore using command prompt type cd restore

3. Next, type this line: rstrui.exe and press ENTER.

system restore using command prompt rstrui.exe

4. In the opened window, click "Next".

restore system files and settings

5. Select one of the available Restore Points and click "Next" (this will restore your computer system to an earlier time and date, prior to the Nemty Special Edition ransomware virus infiltrating your PC).

select a restore point

6. In the opened window, click "Yes".

run system restore

7. After restoring your computer to a previous date, download and scan your PC with recommended malware removal software to eliminate any remaining Nemty Special Edition ransomware files.

To restore individual files encrypted by this ransomware, try using Windows Previous Versions feature. This method is only effective if the System Restore function was enabled on an infected operating system. Note that some variants of Nemty Special Edition are known to remove Shadow Volume Copies of the files, so this method may not work on all computers.

To restore a file, right-click over it, go into Properties, and select the Previous Versions tab. If the relevant file has a Restore Point, select it and click the "Restore" button.

Restoring files encrypted by CryptoDefense

If you cannot start your computer in Safe Mode with Networking (or with Command Prompt), boot your computer using a rescue disk. Some variants of ransomware disable Safe Mode making its removal complicated. For this step, you require access to another computer.

To regain control of the files encrypted by Nemty Special Edition, you can also try using a program called Shadow Explorer. More information on how to use this program is available here.

shadow explorer screenshot

To protect your computer from file encryption ransomware such as this, use reputable antivirus and anti-spyware programs. As an extra protection method, you can use programs called HitmanPro.Alert and EasySync CryptoMonitor, which artificially implant group policy objects into the registry to block rogue programs such as Nemty Special Edition ransomware.

Note that Windows 10 Fall Creators Update includes a "Controlled Folder Access" feature that blocks ransomware attempts to encrypt your files. By default, this feature automatically protects files stored in the Documents, Pictures, Videos, Music, Favorites, and Desktop folders.

Controll Folder Access

Windows 10 users should install this update to protect their data from ransomware attacks. Here is more information on how to get this update and add an additional protection layer from ransomware infections.

HitmanPro.Alert CryptoGuard - detects encryption of files and neutralises any attempts without need for user-intervention:

hitmanproalert ransomware prevention application

Malwarebytes Anti-Ransomware Beta uses advanced proactive technology that monitors ransomware activity and terminates it immediately - before reaching users' files:

malwarebytes anti-ransomware

  • The best way to avoid damage from ransomware infections is to maintain regular up-to-date backups. More information on online backup solutions and data recovery software Here.

Other tools known to remove Nemty Special Edition ransomware:

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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Removal Instructions in other languages
Malware activity

Global malware activity level today:

Medium threat activity

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

QR Code
Nemty Special Edition virus QR code
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