Home Guides NamPoHyu virus ransomware decryptor and removal

NamPoHyu virus ransomware decryptor and removal

6 min read
Stay on top of the NamPoHyu virus ransomware campaign, find out what its uniqueness is, and learn the applicable methods to recover from the attack.
  1. What is the NamPoHyu virus?
  2. NamPoHyu ransomware automated removal and data recovery
  3. NamPoHyu ransomware manual removal and file recovery
  4. Ransomware Prevention Tips

What is the NamPoHyu virus?

Servers are an increasingly enticing target for online extortionists, because there is typically more data to encrypt and the administrators are likely to cough up bigger amounts of money for restoring the records. Plus, it turns out that many of them are low-hanging fruit. The operators of the ransom Trojan dubbed NamPoHyu virus go with the flow as they are targeting Samba servers that don’t utilize proper anti-breach mechanisms. This sample made its appearance in mid-April and was preceded by a strain called MegaLocker that had splashed onto the arena a month earlier. Both share the same principle of finding victims through scanning the Internet for Samba instances with authentication disabled altogether – sadly enough, their worldwide count reaches about half a million at this point. Although the general approach is nothing new, the ransomware lineage under scrutiny is one of a kind.

NamPoHyu virus leaves a ransom note named !DECRYPT_INSTRUCTION.txt
NamPoHyu virus leaves a ransom note named !DECRYPT_INSTRUCTION.txt

What makes the culprit stand out is the specificity of its execution and data encryption. Whereas in nearly every other ransomware scenario these two processes are isolated to the infected host, the NamPoHyu virus keeps them segregated from each other. In other words, the malicious binary runs on a local machine owned by the criminals, and the file encryption routine on a plagued server is performed remotely. It means the malefactors needn’t employ any payload injection techniques to deliver their pest onto systems. Instead, all they need to do is spot poorly secured Samba set-ups and gain unauthorized access to them without actually depositing any malicious entities. As a result, the toxic encryption process is triggered remotely and results in applying a cipher to lock down the data stored on the compromised server as well as NAS devices whose quantity can be impressive. Every encoded entry gets the .NamPoHyu extension added to the original filename. An example is a Wallpaper.bmp image’s being changed to Wallpaper.bmp.NamPoHyu.

The only thing actually dropped onto contaminated hosts is the ransom note named !DECRYPT_INSTRUCTION.txt. It tells the victim what has happened, with the intro phrase being “All of your files were protected by a strong encryption with AES cbc-128 using NamPoHyu Virus”. This manual additionally provides the victim’s personal ID to be used for accurate file decryption in case the user is okay with paying the ransom. Speaking of the buyout, it comes down to submitting $1000 for organizations, or $250 for individual users. The payment ways may vary depending on the victim’s location, but the universal one is Bitcoin. The user is also instructed to install Tor browser and open a specified page with it. It is titled “NamPoHyu Virus Decryption Tool” and says the victim should send their unique ID to alexshkipper@mail.ru to get the receiving BTC address for the ransom.

NamPoHyu virus Tor decryption page
NamPoHyu virus Tor decryption page

The good news is, cybersecurity analysts created a free decrypt tool for this ransomware in early May 2019. Called “Emsisoft Decrypter for MegaLocker” supports both the NamPoHyu virus and its precursor mentioned above. The author of the infection has since posted on a security forum that he was going to switch to a different encryption algorithm to get around the free solution. Time will tell whether or not the felons will carry through with their claims, but in the meanwhile those affected should refrain from paying the ransom and try the tool. If it doesn’t help for whatever reason, or in case the malicious crypto implementation actually undergoes a tweak to circumvent the benign breakthrough, the NamPoHyu virus victims should follow the steps listed above. The follow-up sections cover alternative data recovery mechanisms and provide the essentials of avoiding ransomware as such.

NamPoHyu ransomware automated removal and data recovery

Owing to an up-to-date database of malware signatures and intelligent behavioral detection, the recommended software can quickly locate the infection, eradicate it and remediate all harmful changes. So go ahead and do the following:

1. Download and install the antimalware tool. Open the solution and have it check your PC for PUPs and other types of malicious software by clicking the Start Computer Scan button

Download .NamPoHyu file virus remover

2. Rest assured the scan report will list all items that may harm your operating system. Select the detected entries and click Fix Threats to get the troubleshooting completed.

Data recovery toolkit to the rescue

Some strains of ransomware are known to delete the original files after the encryption routine has been completed. As hostile as this activity appears, it can play into your hands. There are applications designed to revive the information that was obliterated because of malfunctioning hardware or due to accidental removal. The tool called Data Recovery Pro by ParetoLogic features this type of capability therefore it can be applied in ransom attack scenarios to at least get the most important files back. So download and install the program, run a scan and let it do its job.

Download Data Recovery Pro

Data Recovery Pro

NamPoHyu ransomware manual removal and file recovery

Some ransomware strains terminate themselves after completing the encryption job on a computer, but some don’t. Furthermore, the NamPoHyu blackmail virus may prevent victims from using popular antimalware tools in order to stay on board for as long as possible. Under the circumstances, it may be necessary to utilize the Safe Mode with Networking or System Restore functionality.

Remove NamPoHyu ransomware using Safe Mode with Networking

Remove NamPoHyu ransomware using Safe Mode with Networking

Boot into Safe Mode with Networking. The method to do it depends on the version of the infected operating system. Follow the instructions below for your OS build.

  • Restart the machine. When the system begins loading back up, keep pressing the F8 key with short intervals. The Windows Advanced Options Menu (Advanced Boot Options) screen will appear.Boot into Safe Mode with Networking on Windows Vista and 7
  • Use arrow keys to select Safe Mode with Networking and hit Enter. Log on with the user account infected by the ransomware.
  • Click on the Search icon next to the Start menu button. Type msconfig in the search field and select the System Configuration option in the results. Go to the Boot tab in the upper part of the GUI.Boot options on Windows 8, 8.1 and 10
  • Under Boot options, select Safe boot and click the Apply button. A prompt will appear to reboot the computer so that the changes take effect. Select the Restart option and wait for the system to load into Safe Mode. Again, log on with the ransomware-stricken user account.

In Safe Mode, the ransom Trojan won’t keep security software from running or otherwise thwart troubleshooting. Open your preferred web browser, download and install an antimalware tool of choice and start a full system scan. Have all the detected ransomware components removed in a hassle-free way.

Get rid of NamPoHyu ransomware using System Restore

Get rid of NamPoHyu ransomware using System Restore

System Restore enables Windows users to roll back all changes made to the OS since the latest restore point creation time. This feature can help eliminate the most persistent ransomware. Before going this route, though, make sure System Restore had been enabled prior to the breach, otherwise the method will be inefficient.

  • Open Windows Advanced Options Menu as described in the previous section: hit F8 repeatedly when the PC is starting up. Use arrow keys to highlight the Safe Mode with Command Prompt entry. Hit Enter.Safe Mode with Command Prompt
  • In the Command Prompt window, type cd restore and hit Entercd restore command
  • Type rstrui.exe in the new command line and press EnterType rstrui.exe command
  • When the System Restore screen pops up, click Next, select a restore point that predates the contamination, and use the application’s controls to roll back the system to this earlier state.System Restore window

Be advised that even after the ransomware is removed, files will still be encrypted and inaccessible. The malicious code cleanup part, however, is important because it keeps a relapse of the infection from occurring further on and eliminates all opportunistic malware.

Ways of non-ransom recovery of .NamPoHyu files

Cracking the crypto used by this ransom Trojan is more of a science fiction thing rather than an attainable prospect for the masses. This is why the troubleshooting in predicaments of this sort is a matter of two approaches: one is to pay the ransom, which isn’t an option for many victims; and the other is to apply instruments that take advantage of the ransomware’s possible weaknesses. If the latter is your pick, the advice below is a must-try.

Backups can make your day

Backups can make your day

Not only are you a lucky person in case you’ve been backing up your most important files, but you’re also a wise and prudent user. This isn’t necessarily a resource-heavy activity these days – in fact, some providers of online services are allocating a sufficient size of cloud storage space for free so that every customer can easily upload their critical data without paying a penny. Having removed the NamPoHyu file ransomware, therefore, all you have to do is download your stuff from the remote server or transfer it all from an external piece of hardware if that’s the case.

Restore previous versions of encrypted files

Restore previous versions of encrypted files

A positive upshot of using this technique depends on whether or not the ransomware has erased the Volume Shadow Copies of the files on your PC. This is a Windows feature that automatically makes and keeps the backups of data elements on the hard drive as long as System Restore is enabled. The cryptoware in question is programmed to switch off the Volume Shadow Copy Service (VSS), but it has reportedly failed to in some cases.

Checking one’s options regarding this workaround is doable in two ways: through the Properties menu of each file or by means of the remarkable open-source tool called Shadow Explorer. We recommend the software-based way because it’s automated, hence faster and easier. Just install the app and use its intuitive controls to get previous versions of the encrypted objects reinstated.
Shadow Explorer

Alternatively, you can leverage the Previous Versions feature, which is native to Windows operating system. This method is more cumbersome that the use of ShadowExplorer, but it can help restore the most important individual files on condition that the ransomware failed to disable the Volume Snapshot Service on the computer. Right-click on a file of choice and select Properties. Then, go to the Previous Versions tab as illustrated below.
Previous Versions

Go ahead and pick the file’s latest backup version on the list. Use the Copy or Restore buttons to reinstate this object to a new path or to its original folder, respectively.

Ransomware Prevention Tips

To avoid the NamPoHyu ransomware and other file-encrypting infections in the future, follow several simple recommendations:

  • Toggle your email provider’s anti-spam settings to filter out all the potentially harmful incoming messages. Raising the bar beyond the default protection is an important countermeasure for ransom Trojans

  • Define specific file extension restrictions in your email system. Make sure that attachments with the following extensions are blacklisted: .js, .vbs, .docm, .hta, .exe, .cmd, .scr, and .bat. Also, treat ZIP archives in received messages with extreme caution

  • Rename the vssadmin.exe process so that ransomware is unable to obliterate all Shadow Volume Copies of your files in one shot

  • Keep your Firewall active at all times. It can prevent crypto ransomware from communicating with its C&C server. This way, the threat won’t be able to obtain cryptographic keys and lock your files

  • Back up your files regularly, at least the most important ones. This recommendation is self-explanatory. A ransomware attack isn’t an issue as long as you keep unaffected copies of your data in a safe place

  • Use an effective antimalware suite. There are security tools that identify ransomware-specific behavior and block the infection before it can do any harm.
These techniques are certainly not a cure-all, but they will add an extra layer of ransomware protection to your security setup.

Revise your security status

Post-factum assessment of the accuracy component in malware removal scenarios is a great habit that prevents the comeback of harmful code or replication of its unattended fractions. Make sure you are good to go by running an additional safety checkup.

Download NamPoHyu ransomware removal tool

Rate article

5/5 (2)

Leave a Reply

Your email address will not be published. Required fields are marked *