NamPoHyu Ransomware

Also Known As: NamPoHyu virus
Distribution: Low
Damage level: Severe

NamPoHyu ransomware removal instructions

What is NamPoHyu?

NamPoHyu is a new version of MegaLocker ransomware, which developers (cyber criminals) use to encrypt data stored on Samba servers. After successful infiltration, this ransomware uses 'brute-force attacks' to guess the passwords of Samba servers that are being connected to on the infected computer. If these servers are hacked, NamPoHyu encrypts files stored on them and makes them unusable unless a ransom is paid. NamPoHyu adds the ".NamPoHyu" extension to each encrypted file. For example, "1.jpg" becomes "1.jpg.NamPoHyu". It also creates a ransom message within a text file called "! DECRYPT_INSTRUCTION.TXT". Victims can find this file in folders that contain encrypted data.

The ransom message states that this ransomware encrypts data using the AES cbc-128 cryptography algorithm. The only way to decrypt files is to pay the ransom. To unlock/decrypt files, victims must send $250 (in Bitcoins) to the NamPoHyu developers. The cost of decryption might be changed over time. It is possible to check if these cyber criminals actually have the tools required for a successful decryption. According to them, this can be done by using a Tor browser to visit the web address provided and following the instructions. NamPoHyu's developers promise to return a decryption tool and key after confirmation of payment (within 24 hours). To download tools required for decryption, victims must visit a website address provided in the ransom message, however, the tools are available only if the ransom is paid. Most cyber criminals cannot be trusted, even if they say otherwise. Typically, paying them gives no positive outcome - they do not send any decryption tools as promised and simply ignore their victims. It is very likely that this is the case with NamPoHyu developers. Unfortunately, most ransomware-type programs cause encryptions that are impossible to decrypt without using tools/keys held by specific ransomware developers (in this case, NamPoHyu). To avoid financial loss and becoming the victim of a scam, we recommend that you use a backup and restore everything from there.

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

NamPoHyu decrypt instructions

There are many malicious programs of this type on the internet including, for example, Langolier, Etols, and Tellyouthepass. Typically, these programs have similar behavior: they encrypt data and allow developers to make ransom demands. Main differences are usually cost of decryption key/tool and cryptography algorithm used to encrypt data. In most cases, ransomware-type viruses are 'uncrackable' and only the developers have decryption capability. In rare cases, these encryptions can be decrypted without the involvement of ransomware developers, but only if these programs are still in development, have bugs/flaws, and so on. To avoid data and financial loss, we recommend that you maintain regular backups and store them on remote servers (Cloud) or unplugged storage devices.

How did ransomware infect my computer?

Typically, ransomware and other computer infections are proliferated through spam campaigns, Trojans, untrustworthy software download sources, software 'cracking' tools and fake/unofficial software updaters. Spam campaigns are used to proliferate computer infections through email attachments. The main goal of these campaigns is to trick recipients into opening the attached file. Cyber criminals usually attach executable files, PDF documents, archives (RAR, ZIP), Microsoft Office documents, JavaScript files, and so on. Opening malicious attachments causes download and installation of ransomware or other high-risk viruses. Trojans are malicious programs designed to cause chain infections. If installed, they download and install other malicious programs. Peer-to-peer (P2P) networks, free file hosting websites, freeware download websites, unofficial pages, and other software download sources of this kind can be used to present malicious executables as legitimate, harmless files. By opening files downloaded from these sources, people risk infecting their computers. Programs that supposedly help people to bypass paid activation of software often download and install malicious programs. Fake software update tools cause damage and infect systems by downloading malware rather than the updates or fixes, or by exploiting bugs/flaws of outdated software installed on the computer.

Threat Summary:
Name NamPoHyu virus
Threat Type Ransomware, Crypto Virus, Files locker.
Encrypted Files Extension .NamPoHyu
Ransom Demanding Message !DECRYPT_INSTRUCTION.TXT
Ransom Amount $250
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 a ransom payment (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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To use full-featured product, you have to purchase a license for Malwarebytes. 14 days free trial available.

How to protect yourself from ransomware infections?

To protect accounts from being hacked, use strong passwords that include random characters. They should not contain details such as names, dates of birthdays, and so on. To protect servers, use a double layer of protection - two different passwords. Do not open attachments/links that are presented in emails received from suspicious, unknown addresses. If a received email is irrelevant (even if presented as 'important') or the sender seems to be suspicious, the best option is to ignore it. Download software from official websites and using direct download links. Any other (third party/unofficial) tools should not be used. Update operating systems or installed programs using implemented functions or tools provided by the official developers only. Using software 'cracking' tools is a cyber crime and can lead to computer infections. Finally, have a reputable anti-virus or anti-spyware suite installed and keep it enabled. If your computer is already infected with NamPoHyu, we recommend running a scan with Malwarebytes for Windows to automatically eliminate this ransomware.

Text presented in NamPoHyu ransomware text file ("! DECRYPT_INSTRUCTION.TXT"):

What happened to your files ?
All of your files were protected by a strong encryption with AES cbc-128 using NamPoHyu Virus.
What does this mean ?
This means that the structure and data within your files have been irrevocably changed,
you will not be able to work with them, read them or see them,
it is the same thing as losing them forever, but with our help, you can restore them.
The encryption key and ID are unique to your computer, so you are guaranteed to be able to return your files.
Your unique id: -
What do I do ?
You can buy decryption for 250$.
But before you pay, you can make sure that we can really decrypt any of your files.
To do this:
1) Download and install Tor Browser ( hxxps:// )
2) Open the hxxp://qlcd3bgmyv4kvztb.onion/index.php?id= web page in the Tor Browser and follow the instructions.
How much time do I have to pay for decryption?
You have 10 days to pay for the ransom after decrypting the test files.
The number of bitcoins for payment is fixed at the rate at the time of decryption of test files.
Keep in mind that some exchangers delay payment for 1-3 days! Also keep in mind that Bitcoin is a very volatile currency,
its rate can be both stable and change very quickly. Therefore, we recommend that you make payment within a few hours.
How to contact you?
We do not support any contact.
What are the guarantees that I can decrypt my files after paying the ransom?
Your main guarantee is the ability to decrypt test files.
This means that we can decrypt all your files after paying the ransom.
We have no reason to deceive you after receiving the ransom, since we are not barbarians and moreover it will harm our business.
How do I pay the ransom?
After decrypting the test files, you will see the amount of payment in bitcoins and a bitcoin wallet for payment.
Depending on your location, you can pay the ransom in different ways.
Use Google to find i
Information on how to buy bitcoins in your country or use the help of more experienced friends.
Here are some links: hxxps:// - payment by bank card
How can I decrypt my files?
After confirmation of payment (it usually takes 8 hours, maximum 24 hours)
you will see on this page ( hxxp://qlcd3bgmyv4kvztb.onion/index.php?id= ) a link to download the decryptor and your aes-key
(for this, simply re-enter (refresh) this page a day after payment)
Download the program and run it.
Attention! Disable all anti-virus programs, they can block the work of the decoder!
Copy aes-key to the appropriate field and select the folder to decrypt.
The program will scan and decrypt all encrypted files in the selected folder and its subfolders.
We recommend that you first create a test folder and copy several encrypted files into it to verify the decryption.

Screenshot of files encrypted by NamPoHyu (".NamPoHyu" extension):

Files encrypted by NamPoHyu

Update May 3rd, 2019 - Emsisoft cyber security company has released a decryption tool capable of restoring data encrypted by MegaLocker and NamPoHyu ransomware-type viruses. You can download the decryptor for free here.

Screenshot of Emsisoft's decryptor for MegaLocker and NamPoHyu :

MegaLocker and NamPoHuy ransomware decrypter

NamPoHyu 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 NamPoHyu 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 NamPoHyu 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 NamPoHyu 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 NamPoHyu 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 NamPoHyu, 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 NamPoHyu 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 as well as 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 NamPoHyu 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 since 2010. Follow me on Twitter and LinkedIn to stay informed about the latest online security threats. Contact Tomas Meskauskas.

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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
NamPoHyu virus QR code
A QR code (Quick Response Code) is a machine-readable code which stores URLs and other information. This code can be read using a camera on a smartphone or a tablet. Scan this QR code to have an easy access removal guide of NamPoHyu virus on your mobile device.
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