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Remove Muhstik ransomware (Free Guide) - Decryption Steps Included

removal by Linas Kiguolis - - | Type: Ransomware

Muhstik ransomware is the cryptovirus that targets NAS devices and demands at least 0.045 BTC for the recovery but can be decrypted

Muhstik ransomware
Muhstik ransomware is the version of another cryptovirus that encrypts files after it uses brute force to get on the system.
Muhstik ransomware is the malware that spreads by brute-forcing QNAP NAS devices with security flaws or weak passwords. Hackers gain access to the phpMyAdmin installation and can operate to encrypt users' files, mark affected data .muhstik extension, hence the name of the virus. This is a version of eCh0raix ransomware or QNAPCrypt malware that was first spotted back in July. Unfortunately, for the hacker group, one of the victims Tobias, paid the ransom of 670 euro to get his files back, but also he analyzed the ransomware further and retrieved the database containing decryption keys from the criminals' server.[1] It was not a legal behavior, but the software developer released almost 3,000 decryption keys to the public.[2] 

This Muhstik ransomware virus can be decrypted thanks to this discovery and hack-back, also QNAPCrypt malware affected files can be decrypted since August. Windows devices can be decrypted with the Emisoft decryptor tool listed below the article with all the needed instructions since there is a need to specify ransom note on the computer to automatically get the decryption key. Many victims already reported that they had recovered .muhstik marked files using this tool. However, you should also remember to clean the machine entirely so that infection repetition can be avoided.

Name Muhstik ransomware
Type Cryptovirus
Devices affected NAS storage devices made by QNAP
Family QNAPCrypt malware or eCh0raix ransomware is the primary virus that this threat emerges from
File marker .muhstik gets added on every file when AES algorithm helps to locke them during the initial encryption process
Ransom note README_FOR_DECRYPT.txt is the file that shows initial ransom message, but other websites also display the instructions and ransom-demanding text
Ransom amount Ranges, but mainly go around 0.045 Bitcoin. Can be increased to 0.09BTC when the victim waits to pay the criminals
Distribution The brute force used to spread this malware and affect NAS devices. Weak passwords for the built-in phpMyAdmin service get used to gain access on the targeted system and other system vulnerabilities 
Elimination Anti-malware programs and other security tools are needed to eliminate the malware traces and remove Muhstik ransomware completely. Get a tool like Reimage for the cleaning
Decryptable? YES. This virus is decryptable with either this tool or the automatic QNAP NAS decrypter. (Both links redirect you to downloads)

Muhstik ransomware starts encryption on QNAP NAS devices when the payload file gets on the system. The malware first checks the system language because when the user is from Russian, Belarus, or Ukraine encryption doesn't start. This is common when malware creators don't want to affect people in particular countries due to criminal penalties. 

Files affected by the Muhstik ransomware differ in formats, and it appears that are more than 400 extensions included in the format list. Microsoft documents, OpenOffice files, PDFS, photos, music files, audio files, or even configuration files and databases, backups get encrypted and locked. However, proc, boot, sys, ru, dev, and home folders get skipped during the encryption.

When this is done, Muhstik ransomware delivers a ransom note in README_FOR_DECRYPT.txt file that gets added on the desktop and displays the following message:

All your files have been encrypted.

You can find the steps to decrypt in any the following links:
hxxp://13.234.89.185/.unlock/payment/[victim's_ID] Could go offline at any time
hxxp://51.38.231.30/.unlock/payment/[victim's_ID] Could go offline at any time

Or use TOR link, guaranteed Online 100% of the time:
hxxp://5mngytmdpeyyp6xk.onion/payment/[victim's_ID] Use TOR browser to access .onion websites.
hxxps://duckduckgo.com/html?q=tor+browser+how+to

Do NOT remove this file and DO NOT remove the last line in this file!

Your ID: 

Also, Muhstik ransomware shows these instructions once the victim goes to payment site via the provided links:

Your files have been encrypted, to recover them you need the decryption software and your private key. You can buy both of them for 0.045 Bitcoin.
Time left for payment:
1 day 17 hours 4 minutes 14 seconds
After this time decryption software cost will be increased to 0.09 BTC.
Find where to get Bitcoin here:
blockchain.info
localbitcoins.com
google.com
Send 0.045 BTC to the following address:
133Y64UxdzREJqYjxXxR3qebbgafpq5FG1
ONLY SUBMIT YOUR EMAIL AFTER YOU SENT THE BTC.
If you submit your email before sending the payment your amount will be instantly doubled!
After payment enter your real email address to get the decryptor software.
Enter a valid email address
Your decrypted demo file is ready to download, open the following link.
http://13.233.53.172/.cache/download/9cc32d5a-8fd4-4ee7-b34b-ed6042b51375-split-IMG_20160608_111553.jpg

You can see that the ransom amount may differ depending on the particular victim and even changes throughout time. Muhstik ransomware developers can change the amount from the beginning when the targeted device contains valuable data, or the victim is somewhat important.

However, there is no need to pay the ransom when Muhstik ransomware removal has better options for you. This threat can harvest your data, steal valuable credentials from the machine directly or save some important files, malware hijacks personal data, and can use that in later scams and campaigns.

Muhstik ransomware virus
Muhstik ransomware is a virus that can affect network drives and corrupt the machine significantly.

Since you can remove Muhstik ransomware and manage to get your files decrypted, you should go straight to saving your files and react to the infection as soon as possible. This malware can spread other infections and use different techniques for that, so get an anti-malware tool or Reimage and run a full scan on the machine to eliminate the traces. 

Muhstik ransomware drops its malicious script and distributes other malware to ensure the persistence, so extortionists behind the threat can make a profit. Also, the threat alters particular settings on the machine, so processes running on the system can be interfered with and disabled.

This is how Muhstik ransomware manages to disable your antivirus tools, security software. For that reason, we recommend going the Safe Mode route before you rely on the AV tool for initial cleaning. Rebooting the machine in this mode helps to smoothly scan the machine and remove all the traces of malware.

Muhstik ransomware virus can also erase your files or Shadow Volume Copies to keep the data recovery difficult. For that, you have other options. Of course, decryption tools that are free can restore your files, but we have listed other alternatives below for you to try. Experts[3] provide many options for everyone, so you can get back to the safe device. Muhstik cryptovirus
Muhstik ransomware is the malware that can be decrypted due to the free decrypter and decryption keys.

Malware relies on security flaws and vulnerabilities like weak passwords

It is known that malware targets network storage devices and uses brute force to get access and start the encryption process. Security flaws, weak passwords for the admin service gets easily used by attackers to get on the machine that is targeted for encryption. Once the payload file is loaded on the system, encryption starts immediately, and data become locked, marked with according appendix.

Virus code is delivered on the machine by using other methods too. Malware attacks can bypass security mechanisms, routers, firewalls, and detection tools. Tactics like phishing campaigns, infected files from spam emails, or file-sharing networks can also lead to the same infection.

You need to take these risks into consideration and stay away from illegal file sharing, cracked software, games, and programs. Keep the machine virus-free by scanning it more often using anti-malware tools and delete emails that appear suspicious without even opening.

Muhstik ransomware virus elimination tips and file recovery tips

Crypto malware that spreads on different systems, across platforms, and so on can differ one from the other, but there are many features that Muhstik ransomware virus and typical ransomware have. The encryption is focused on common files, and system folders are left untouched, for example. 

However, system files get affected in different ways when malware disables programs, functions, and adds files or applications that run in the background without your permission. This is why many experts and researchers more recommend the automatic Muhstik ransomware removal process.

This is why we recommend choosing the anti-malware tool wisely and proceed to remove Muhstik ransomware from the machine. This is how you can fix the damage and eliminate this threat without corrupting crucial parts of the system. Reimage, SpyHunter 5Combo Cleaner,or Malwarebytes are the applications needed for this job.

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What to do if failed?
If you failed to remove virus damage using Reimage, submit a question to our support team and provide as much details as possible.
Reimage is recommended to remove virus damage. Free scanner allows you to check whether your PC is infected or not. If you need to remove malware, you have to purchase the licensed version of Reimage malware removal tool.
Alternative Software
Different security software includes different virus database. If you didn’t succeed in finding malware with Reimage, try running alternative scan with SpyHunter 5.
Alternative Software
Different security software includes different virus database. If you didn’t succeed in finding malware with Reimage, try running alternative scan with Combo Cleaner.

To remove Muhstik virus, follow these steps:

Remove Muhstik using Safe Mode with Networking

You should reboot the machine in Safe Mode with Networking and then remove Muhstik ransomware

  • Step 1: Reboot your computer to Safe Mode with Networking

    Windows 7 / Vista / XP
    1. Click Start Shutdown Restart OK.
    2. When your computer becomes active, start pressing F8 multiple times until you see the Advanced Boot Options window.
    3. Select Safe Mode with Networking from the list Select 'Safe Mode with Networking'

    Windows 10 / Windows 8
    1. Press the Power button at the Windows login screen. Now press and hold Shift, which is on your keyboard, and click Restart..
    2. Now select Troubleshoot Advanced options Startup Settings and finally press Restart.
    3. Once your computer becomes active, select Enable Safe Mode with Networking in Startup Settings window. Select 'Enable Safe Mode with Networking'
  • Step 2: Remove Muhstik

    Log in to your infected account and start the browser. Download Reimage or other legitimate anti-spyware program. Update it before a full system scan and remove malicious files that belong to your ransomware and complete Muhstik removal.

If your ransomware is blocking Safe Mode with Networking, try further method.

Remove Muhstik using System Restore

System Restore feature allows to recover the machine in a state where the virus wasn't present

  • Step 1: Reboot your computer to Safe Mode with Command Prompt

    Windows 7 / Vista / XP
    1. Click Start Shutdown Restart OK.
    2. When your computer becomes active, start pressing F8 multiple times until you see the Advanced Boot Options window.
    3. Select Command Prompt from the list Select 'Safe Mode with Command Prompt'

    Windows 10 / Windows 8
    1. Press the Power button at the Windows login screen. Now press and hold Shift, which is on your keyboard, and click Restart..
    2. Now select Troubleshoot Advanced options Startup Settings and finally press Restart.
    3. Once your computer becomes active, select Enable Safe Mode with Command Prompt in Startup Settings window. Select 'Enable Safe Mode with Command Prompt'
  • Step 2: Restore your system files and settings
    1. Once the Command Prompt window shows up, enter cd restore and click Enter. Enter 'cd restore' without quotes and press 'Enter'
    2. Now type rstrui.exe and press Enter again.. Enter 'rstrui.exe' without quotes and press 'Enter'
    3. When a new window shows up, click Next and select your restore point that is prior the infiltration of Muhstik. After doing that, click Next. When 'System Restore' window shows up, select 'Next' Select your restore point and click 'Next'
    4. Now click Yes to start system restore. Click 'Yes' and start system restore
    Once you restore your system to a previous date, download and scan your computer with Reimage and make sure that Muhstik removal is performed successfully.

Bonus: Recover your data

Guide which is presented above is supposed to help you remove Muhstik from your computer. To recover your encrypted files, we recommend using a detailed guide prepared by 2-spyware.com security experts.

If your files are encrypted by Muhstik, you can use several methods to restore them:

Data Recovery Pro is the solution for encrypted files when backups are not the best option

Encrypted or accidentally deleted files can be recovered with the help of this software

  • Download Data Recovery Pro;
  • Follow the steps of Data Recovery Setup and install the program on your computer;
  • Launch it and scan your computer for files encrypted by Muhstik ransomware;
  • Restore them.

Windows Previous Versions can help recover files individually

When you enable the System Restore feature, Windows Previous Versions can help to restore those files that virus affected

  • Find an encrypted file you need to restore and right-click on it;
  • Select “Properties” and go to “Previous versions” tab;
  • Here, check each of available copies of the file in “Folder versions”. You should select the version you want to recover and click “Restore”.

ShadowExplorer is the method helpful with your encoded data

When Muhstik ransomware leaves Shadow Volume Copies alone, you can rely on ShadowExplorer

  • Download Shadow Explorer (http://shadowexplorer.com/);
  • Follow a Shadow Explorer Setup Wizard and install this application on your computer;
  • Launch the program and go through the drop down menu on the top left corner to select the disk of your encrypted data. Check what folders are there;
  • Right-click on the folder you want to restore and select “Export”. You can also select where you want it to be stored.

Thanks to recent decryption key releases Muhstik ransomware has a decryption tool

Emisoft decryption tool can help with files compromised by Muhstik ransomware virus. Get it here

Finally, you should always think about the protection of crypto-ransomwares. In order to protect your computer from Muhstik and other ransomwares, use a reputable anti-spyware, such as Reimage, SpyHunter 5Combo Cleaner or Malwarebytes

About the author

Linas Kiguolis
Linas Kiguolis - Expert in social media

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