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

removal by Olivia Morelli - - | Type: Ransomware
12

Here we go again: Amnesia ransomware reappears in November 2017

The ransom note of Amnesia ransomware

Amnesia ransomware is a term that covers a variety of malicious file-encrypting computer programs often referred to as “ransomware[1].” The latest its version is called Amnesia2 ransomware. Each version of this ransomware encrypts files to demand a ransom from the computer user in exchange for the data recovery software.

Currently known versions of Amnesia virus append one of the following file extensions to the compromised files: .am, .01, .02, .wncry (previously used by Wannacry virus), .scarab, .[lioghaly@india.com].TRMT, .onion, .BAGI, .[byd@india.com].SON, .@decrypt2017, .[Help244@Ya.RU].LOCKED, .LOGOZ, .[black.mirror@qq.com].oled, .CRYPTOBOSS.

The ransomware usually saves the ransom-demanding message in a note called HOW TO RECOVER ENCRYPTED FILES.TXT, although the name of this message depends on the virus' version. You can also find these .amnesia files on your computer after being infected: IF YOU WANT TO GET ALL YOUR FILES BACK, PLEASE READ THIS.TXT, Instruction for recovery of files WannaCry.TXT, Инструкция по расшифровке файлов WannaCry.TXT or RECOVER-FILES.HTML, Instruction for recovery of data.txt in every folder affected by Amnesia ransomware.

Following a successful encryption and the ransom warning, virus automatically opens the ransom note either via Notepad or the default web browser. In the ransom note, criminals provide victim's personal ID and the email address which should be used for contacting. They demand writing to s1an1er111@protonmail.com, byd@india.com, chines34@protonmail.ch, lioghaly@india.com or support@bitmessage.ch.

The criminals typically urge the victim to contact them within 24 hours and include the personal ID. According to fraudsters, this is the only way to “switch off any removal of files.” Otherwise they promise to delete 24 files each day. Criminals have also set a deadline until when the victim has to pay the ransom to eliminate amnesia file extension and other extensions from affected files. They want to receive the payment in Bitcoins within 72 hours starting from the minute that the computer got infected.

At first, it seemed that this virus was a new version of Cryptolocker and Globe ransomware[2], however, further analysis revealed that virus origins’ aren’t associated with the infamous virus at all. Therefore, the decryptor created for Globe is worthless when trying to decrypt files encrypted by the new ransomware virus.

However, victims can recover their files using data backups[3] created prior to ransomware attack or data recovery methods explained below the article. Before trying to import copies of data into a compromised computer or use the decryption tools, victims should clean the system from ransomware remains using anti-malware programs such as Reimage. Our team recommends using Amnesia ransomware removal tutorial that is provided below the article to complete the procedure successfully.

You can now decrypt your files for free!

The ransomware has been successfully analyzed and malware analysts from Emsisoft managed to create a decryption tool that restores .amnesia file extension files for free.

The malicious virus works as a virtual extortion tool[4], which is distributed using various deceptive means. Once it manages to enter user’s computer system and execute itself, it scans the every partition of the computer and encrypts every file that has a file extension that matches one from virus’ target list.

Sadly, the encryption that the malicious program uses is sophisticated, and there’s no way to initiate a reverse process without having the private key that ransomware removes from the system as soon as files get encrypted. This is exactly the piece of code that cyber criminals suggest buying for a certain price, and that is why they ask the victim to get in touch with them via an email provided in the email message.

They ask victims to buy Bitcoins worth certain amount of dollars (usually between $300-$2000) and transfer them to criminals’ virtual wallet. Security researchers do not recommend paying extortionists because criminals often forget their promises as soon as they receive the payment[5].

As a result, you can be left out without files and money, so better remove Amnesia ransomware without a doubt and use the decrypter to recover your files (the download link is provided below).

Most prevalent versions of Amnesia ransomware

.WNCRY file extension virus. This fake copy of WannaCry ransomware has been around for about two months. First discovered on June 20, the ransomware was spotted using English and Russian ransom note names: Инструкция по расшифровке файлов WannaCry.TXT and Instruction of recovery files WannaCry.txt (also spotted using Instruction for recovery of data.txt).

In the ransom note, criminals provide a message explaining how to decrypt corrupted files – pay a ransom in Bitcoins. The ransom must be paid within 72 hours. To get detailed data recovery instructions, criminals command writing to helper@bitmessage.ch.

We recommend you to remove .wncry file extension virus because it has no relations with the real WannaCry virus (also known as .wncry virus). Besides, data encrypted by this Amnesia variant can be decrypted.

.onion file extension virus. The .onion file extension is associated with other ransomware families such as CrySiS/Dharma or Cry128. Amnesia ONION ransomware drops HOW TO RECOVER ENCRYPTED FILES.TXT, in which it states that files can be decrypted for 2 Bitcoins if the victim pays on the same day. If the victim decides to pay the ransom the next day, the price will rise to 4 Bitcoins.

Criminals suggest writing to k.matroski@aol.com after paying the ransom. We do not recommend doing so. Instead, remove the malware and try available decryption tools that were designed to decrypt your files for free.

TRMT ransomware virus. This ransomware uses .[lioghaly@india.com].TRMT file marker on encrypted files. In addition, the virus completely distorts the original filename. The new version continues using identically named ransom note like .onion file extension virus does. The virus uses weak encryption method, so you might be lucky – test the decryption tools provided below the article to restore your data for free.

Amnesia2 ransomware. This version of the malicious program which spreads as a locker.exe file. You can download this file hidden in fake email attachments, illegal programs' versions or after clicking on malicious ad. Once inside the system, Amnesia2 ransomware encrypts victim's files and appends one of these file extensions: .am, .01, .02. 

Recently, security researchers announced that discovered a new strain of this file-encrypting virus. However, cyber criminals who are working behind this ransomware do not provide information on how to contact them. Luckily, Amnesia2 is decryptable with one of the alternative tools that have been prepared to beat Amnesia ransomware.

Tips to keep the ransomware away

Ransomware viruses that operate similarly as Amnesia malware are usually distributed same techniques that haven’t actually changed a lot throughout the last year. These viruses are proliferates using spam, malvertising, and more sophisticated tricks that involve usage of exploit kits and compromised websites.

The only way to fight against ransomware viruses is to rely on multi-layer protection means. These tips from NoVirus.uk can help you to keep your computer safe:

  • Be careful when opening emails you received from unknown individuals and surely avoid URLs and email attachments added to strange messages because clicking them can summon a ransomware program.
  • Keeping an up-to-date anti-malware program on the system can also help you avoid virus’ attacks; however, security experts always advise users to create data backups even if the computer is protected with a good anti-malware software.
  • Always install software updates offered to you by your computer, but stay away from suspicious web ads that might attempt to trick you into installing dangerous programs!

Delete Amnesia virus and recover your files

Users should remove Amnesia virus without delay and we recommend using professional malware removal software to complete such task. In other words, we suggest running a system scan with anti-malware or anti-spyware program to detect ransomware files placed all over the system. Sometimes such viruses are programmed to prevent removal and even detection, so before you take any actions regarding Amnesia removal, we suggest restarting your PC in Safe Mode (see instructions provided below) to temporarily disable the virus.

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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 Amnesia 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 Amnesia virus Removal Guide:

Remove Amnesia 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.

Remove the ransomware with a help of a guide we present below.

  • 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 Amnesia

    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 Amnesia removal.

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

Remove Amnesia using System Restore

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 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 Amnesia. 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 Amnesia removal is performed successfully.

Bonus: Recover your data

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

To decrypt your files, you need to have a special key that is stored in cyber criminals' servers. In short, it is nearly impossible to get it from there if you're unwilling to pay a ransom. We do not recommend thinking about this option at all. If you have data backups, you can restore your files quickly, but if you don't, use one of the following methods.

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

Try Data Recovery Pro software

Data Recovery Pro can help when you need to restore certain files that were either deleted, corrupted, or encrypted. Although it might not restore all of your files, this tool is definitely worth a try.

The benefits of Shadow Explorer software

ShadowExplorer comes in handy in case the malicious virus fails to eliminate Volume Shadow Copies from the system. These copies can give access to your files again, and ShadowExplorer helps to use them to recreate encrypted files.

  • 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.

Decrypt files locked by Amnesia virus using a decryption tool

As we previously mentioned, researchers from Emsisoft designed a program that can reverse the encryption procedure and decrypt your files encrypted by Amnesia malware. Download either Amnesia or Amnesia2 decrypter and use it to restore your files.

Finally, you should always think about the protection of crypto-ransomwares. In order to protect your computer from Amnesia 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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