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X1881 ransomware virus. How to remove? (Uninstall guide)

removal by Olivia Morelli - - | Type: Ransomware
12

The new CryptoMix version – x1881 virus – is already online

The screenshot of x1881 ransom noite

x1881 virus defines a new version of the notorious CryptoMix ransomware group. In comparison with previous versions, there are minimal changes. The most distinguishable of them is a different extension. After finishing the encryption process, the malware appends .x1881 extension. The demands are delivered in the _HELP_INSTRUCTION.txt file. This version mentions four email addresses:

  • x1881@tuta.io;
  • x1883@yandex.com;
  • x1881@protonmail.com;
  • x1884@yandex.com;

The malware continues the tradition of Shark CryptoMix version to use 11 RSA-1024 keys. This feature grants the possibility to function offline. It also leaves its registry entry among the registry files –HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run “Admin”=”C:\ProgramData\[Random].exe[1].

Fortunately, the majority of security applications already detect the malware. It is found by alternative names: Win-Trojan/Sagecrypt.Gen, TR/Crypt.ZPACK.qwkzv, Win32/Filecoder.HydraCrypt.M, Ransom.CryptoMix, etc.
Unfortunately, it disguises under a random executable file. If you have been struck with this cyber misfortune, it is not recommended to pay the ransom. A while ago, Avast researchers released a free CryptoMix decrypter.

There is no information whether the developers sent the decryption key to the victims who remitted the payment. Therefore, x1881 removal might be a better decision. You can accelerate the process with Reimage or Malwarebytes Anti Malware. Update them before scanning the system. If you encounter technical difficulties performing the elimination, take a look at the guide below the article.

x1881 malware transmission trends

In order to keep up CryptoMix activity, the developers no longer rely solely on spam emails or trojans. This malware family gained attention after reports that its version, Revenge malware, has been spread with the assistance of RIG exploit kit[2].

This hacking tool is actually a Javascript code. Due to its flexible form, cyber villains can inject it any website, not just poorly secured domains.

The exploit kit is designed to target a specific vulnerability[3]. This peculiarity explains why WannaCry attack and Equifax data breach case were successful. If you have failed to update your browser or operating system, the risk to get infected with the kit is much higher. Thus, in order to limit the probability of x1881 hijack, update crucial programs.

Remove x1881 ransomware completely

Unfortunately, CryptoMix virus is troublesome so is its elimination. Let security tool take care of x1881 removal. If the virus prevents you from launching the program, reboot the system in Safe Mode. It will grant you access to vital operating system functions, and you will be able to remove x1881 virus.

After the infection is deleted, proceed to data recovery methods. Use the official Avast decrypter. You will also find a few program suggestions at the bottom of the instructions. All, not only British, German[4] or French, users should be wary of the latest x1881 version.

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What to do if failed?
If you failed to remove infection using Reimage, submit a question to our support team and provide as much details as possible.
Reimage is recommended to uninstall x1881 ransomware virus. 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.

More information about this program can be found in Reimage review.

More information about this program can be found in Reimage review.

Manual x1881 virus Removal Guide:

Remove x1881 using Safe Mode with Networking

Reimage is a tool to detect malware.
You need to purchase Full version to remove infections.
More information about Reimage.

  • 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 x1881

    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 x1881 removal.

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

Remove x1881 using System Restore

Reimage is a tool to detect malware.
You need to purchase Full version to remove infections.
More information about Reimage.

If you cannot access the cyber security program to eliminate x1881 virus, perform system restore. It will revert to the previous last saved restore point. Likewise, you might succeed in accessing the program and and eliminating the virus.

  • 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 x1881. 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 x1881 removal is performed successfully.

Bonus: Recover your data

Guide which is presented above is supposed to help you remove x1881 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 x1881, you can use several methods to restore them:

Data Recovery Pro option

This program is designed to restore damaged data due to a system crash. Nonetheless, it might turn out as a practical solution in dealing with ransomware as well.

ShadowExplorer method

This program creates the copies of the original files on the basis of shadow volume copies. In case, the below decrypter fails to recover data, you might try this one.

  • 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.

x1881 Decrypter

Avast updates the decrypter from time to time. Though it may not decode the files with .x1881 file extension at the moment, soon you may be able to do so.

Finally, you should always think about the protection of crypto-ransomwares. In order to protect your computer from x1881 and other ransomwares, use a reputable anti-spyware, such as Reimage, Plumbytes Anti-MalwareWebroot SecureAnywhere AntiVirus or Malwarebytes Anti Malware

About the author

Olivia Morelli
Olivia Morelli - Ransomware analyst

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