Amnesia Ransomware

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

Amnesia ransomware removal instructions

What is Amnesia?

Amnesia is ransomware-type malware discovered by xXToffeeXx and developed using the Delphi programming language. Once infiltrated, this malware encrypts various data and appends filenames with the ".amnesia" extension (for example, "sample.jpg" is renamed to "sample.jpg.amnesia"). Other variants of this ransomware append, .am, .LOGOZ, .TRMT, .onion, .[].oled, .@decrypt_files2017, .SON, .[Help244@Ya.RU].LOCKED, .@decrypt2017, .CRYPTBOSS and .01 or .02 extensions to encrypted files. Following successful encryption, Amnesia creates a text file ("HOW TO RECOVER ENCRYPTED FILES.TXT"), placing it in each folder containing encrypted files.

Amnesia's text file contains a message that informs victims of the encryption. To restore compromised data, victims must supposedly contact the developers via an email address ("") provided. It is currently unknown whether Amnesia uses symmetric or asymmetric cryptography, however, in any case, decryption without a unique key is impossible. Cyber criminals store this key on a remote server and victims are encouraged to pay a ransom to receive it. The cost is currently unconfirmed, however, developers of ransomware-type viruses usually demand the equivalent of between $500 and 1500 in Bitcoins. These criminals should never be trusted - they often ignore victims once payments are submitted. Never attempt to contact these people or pay any ransom. Unfortunately, there are currently no tools capable of restoring files encrypted by Amnesiransomware and, thus, you can only restore your files/system from a backup.

Screenshot of a message encouraging users to contact cyber criminals to decrypt their compromised data:

Amnesia decrypt instructions

Amnesia shares many similarities with CryptoMix, Ranion, Apocalypse, and dozens of other ransomware-type viruses. Note that, as with Amnesia, these malware infections also encrypt data and make ransom demands. There are just two major differences: 1) type of encryption algorithm [symmetric or asymmetric] used, and; 2) cost of decryption. Ransomware-type viruses are often distributed using spam emails (malicious attachments), third party software download sources (freeware download websites, free file hosting websites, torrents, etc.), fake software update tools, and trojans. Therefore, be cautious when opening files received from suspicious emails, and when downloading software from unofficial sources. Furthermore, keep your installed applications up-to-date and use a legitimate anti-virus/anti-spyware suite. Bear in mind, however, that criminals employ fake updaters to proliferate various malware. Therefore, you should never use third party tools to update installed software. Poor knowledge and careless behavior are the main reasons for computer infections. The key to computer safety is caution.

Update 8 May, 2017 - Security researcher Fabian Wosar has released a free decrypter for this ransomware. You can download it HERE.

amnesia ransomware decrypter download

Text presented within amnesia ransomware "HOW TO RECOVER ENCRYPTED FILES.TXT" file:


Your personal ID: -

Attention! What happened?
Your documents, databases and other important data has been encrypted.
If you want to restore files send an email to:
IN a letter to indicate your personal identifier (see in the beginning of this document).

* Do not attempt to remove the program or run the anti-virus tools.
* Attempts to self-decrypt files will result in the loss of your data.
* Decoders are not compatible with other users of your data, because each user’s unique encryption key.

Screenshot of files encrypted by Amnesia (".amnesia" extension):

Files encrypted by Amnesia

Update 2 June, 2017 - A new variant of this ransomware has been released. It is using .TRMT extension for encrypted files and HOW TO RECOVER ENCRYPTED FILES.TXT file for ransom demanding message.

Wallpaper used by this variant:

amnesia ransomware .trmt variant wallpaper

HOW TO RECOVER ENCRYPTED FILES.TXT file used to display ransom demanding message:

amnesia ransomware trmt variant ransom demanding message HOW TO RECOVER ENCRYPTED FILES.TXT

Text in this presented in this file:

Your personal identifier

All your files have been encrypted due to a security problem with your PC. If you want to restore them, write us to the e-mail:
You have to pay for decryption in Bitcoins. The price depends on how fast you write to us. After payment we will send you the decryption tool that will
decrypt all your files.
If you can't contact us by You can write to us on this mail:
Free decryption as guarantee
Before paying you can send to us up to 3 files for free decryption. Please note that files must NOT contain valuable information and their total size
must be less than 10Mb.
How to obtain Bitcoins
The easiest way to buy bitcoins is LocalBitcoins site. You have to register, click 'Buy bitcoins', and select the seller by payment method and price.
Also you can find other places to buy Bitcoins and beginners guide here::
Do not rename encrypted files.
Do not try to decrypt your data using third party software, it may cause permanent data loss.
Decoders of other users are incompatible with your data, as each user has a unique encryption key

File encrypted by this variant (.TRMT extension, for example sample.jpg after encryption looks like 2g000000000WCzC6GXRj0l3Zlhl7ThSA.[].TRMT):

amnesia ransomware .trmt extension for encrypted files

Update  5 June, 2017 - Security researcher xXToffeeXx spotted a variant of this ransomware that impersonates Wcry ransomware. It users .wncry extension for encrypted files and stores it’s ransom demanding message in WannaCry.TXT file.

Amnesia ransomware removal:

Instant automatic removal of Amnesia virus: Manual threat removal might be a lengthy and complicated process that requires advanced computer skills. Spyhunter is a professional automatic malware removal tool that is recommended to get rid of Amnesia virus. Download it by clicking the button below:
▼ DOWNLOAD Spyhunter By downloading any software listed on this website you agree to our Privacy Policy and Terms of Use. Free scanner checks if your computer is infected. To remove malware, you have to purchase the full version of Spyhunter.

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 Amnesia 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 Amnesia 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 Amnesia 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 Amnesia 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 Amnesia, 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 Amnesia ransomware.

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 Amnesia 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.

PCrisk security portal is brought by a company RCS LT. Joined forces of security researchers help educate computer users about the latest online security threats. More information about the company RCS LT.

Our malware removal guides are free. However, if you want to support us you can send us a donation.

Removal Instructions in other languages
Malware activity

Global virus and spyware activity level today:

Medium threat activity

Increased attack rate of infections detected within the last 24 hours.

QR Code
Amnesia 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 Amnesia virus on your mobile device.
We Recommend:

Get rid of Amnesia virus today:

▼ REMOVE IT NOW with Spyhunter

Platform: Windows

Editors' Rating for Spyhunter:
Editors ratingOutstanding!

[Back to Top]

Free scanner checks if your computer is infected. To remove malware, you have to purchase the full version of Spyhunter.