Asasin Ransomware

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

Asasin ransomware removal instructions

What is Asasin?

Asasin is a new variant of a high-risk ransomware-type virus called Locky. Cyber criminals spread this ransomware using spam emails (malicious attachments). At the time of research, the malicious attachment was a .vbs file, which, once executed, starts the infection chain by downloading and running Asasin malware on the victim's computer. Following successful infiltration, Asasin encrypts stored data using RSA-2048 and AES-128 encryption algorithms. During encryption, Asasin renames encrypted files using a 36-letter and digit combination with a ".asasin" extension (previous variants of Locky used ".aesir", ".ykcol", ".diablo6", and a number of other extensions). Once the files are encrypted, Asasin creates three additional files ("asasin.bmp" [also set as the desktop background], "asasin-5eac.htm", and "asasin.htm"), placing them on the desktop.

The three new files contain identical messages that inform victims of the encryption and encourage them to visit Asasin's website where they will supposedly be provided with decryption instructions. As mentioned above, Asasin uses RSA and AES cryptographies and, therefore, two unique decryption keys are generated during encryption. Cyber criminals store these keys on a remote server and, since restoring files without them is impossible, victims are encouraged to pay a ransom of .3 Bitcoins (currently equivalent to ~$1440) to obtain them. After paying the ransom, victims supposedly receive a decryption tool with the keys embedded within. In fact, research shows that developers of ransomware-type viruses often ignore victims once payments are submitted. These criminals cannot be trusted. Paying does not guarantee that your files will ever be decrypted - you will probably be scammed and support cyber criminals' malicious businesses. We strongly advise you to ignore all requests to pay. Unfortunately, there are currently no tools capable of restoring data encrypted by Asasin ransomware. The only solution is to restore your files/system from a backup.

Screenshot of a message encouraging users to pay a ransom to decrypt their compromised data:

Asasin decrypt instructions

Locky and its other variants are not the only viruses that share similarities with Asasin - there are hundreds of others that are virtually identical. The list of examples includes (but is not limited to) Jigsaw, Cerber, BTCWare, and GlobeImposter. These viruses are developed by different cyber criminals, however, their behavior is identical - all encrypt files and make ransom demands. The only major differences are size of ransom and type of encryption algorithm used. Many employ algorithms that generate unique decryption keys. Therefore, unless the malware contains bugs/flaws (for example, stores the key on the victim's computer), restoring files manually without involvement of developers (contacting these people is not recommended) is impossible. Ransomware-type viruses such as Asasin present a strong case for maintaining regular data backups.

How did ransomware infect my computer?

Cyber criminals proliferate ransomware-type viruses in various ways (in some cases, they even install malware manually), however, the most common five are: 1) spam emails; 2) peer-to-peer [P2P] networks; 3) unofficial software download sources; 4) fake software update tools, and; 5) trojans. As mentioned above, spam emails contain malicious attachments (in most cases JavaScript files or MS Office documents with macros) that download and install malware. Furthermore, P2P networks (torrents, eMule, etc.) and other unofficial software download sources (freeware download websites, free file hosting websites, etc.) often present malicious executables as legitimate software. Fake software update tools exploit outdated software bugs/flaws to infect the system. Trojans simply open "gates" for other malware to install.

How to protect yourself from ransomware infections?

The main reasons for computer infections are poor knowledge and careless behavior. Therefore, be very cautious when browsing the Internet. Never open attachments received from suspicious email addresses - these emails should be deleted immediately without opening. Furthermore, download your software from official/trusted sources only and, if possible, use a direct download link (third party downloaders/installers often stealthily infiltrate malicious software). Keep installed applications updated, however, note that criminals proliferate ransomware via fake updaters and, therefore, using these tools is very risky. Using a legitimate anti-virus/anti-spyware suite is also essential. The key to computer safety is caution.

Screenshot of Asasin ransomware HTML file:

Asasin html file

Screenshot of Asasin ransomware desktop wallpaper and asasin.bmp file (created on the desktop):

Asasin wallpaper

Text presented within files (asasin.bmp", "asasin-5eac.htm", and "asasin.htm") created by Asasin ransomware (on the desktop):

All of your files are encrypted with RSA-2048 and AES-128 ciphers. More information about the RSA and AES can be found here: hxxp:// hxxp://
Decrypting of your files is only possible with the private key and decrypt program, which is on our secret server. To receive your private key follow one of the links:
If all of this addresses are not available, follow these steps: 1. Download and install Tor Browser: hxxps:// 2. After a successful installation, run the browser and wait for initialization. 3. Type in the address bar: g46mbrrzpfszonuk.onion/GPZ9PT8ABFEUGKAJ 4. Follow the instructions on the site.
!!! Your personal identification ID: GPZ9PT8ABFEUGKAJ !!!

Screenshot of Asasin ransomware Tor website:

Asasin website

Text presented within this website:

Locky Decryptor™

We present a special software - Locky Decryptor™ -
which allows to decrypt and return control to all your encrypted files.

How to buy Locky Decryptor™?
You can make a payment with BitCoins, there are many methods to get them.
You should register BitCoin wallet:
Simplest online wallet or Some other methods of creating wallet
Purchasing Bitcoins, although it's not yet easy to buy bitcoins, it's getting simpler every day.
Send 0.3 BTC to Bitcoin address: 1DgA5njQojcpmJ6xCpg1eQvJyJ9LxtFEhR
Note: Payment pending up to 30 mins or more for transaction confirmation, please be patient...
Refresh the page and download decryptor.
When Bitcoin transactions will receive one confirmation, you will be redirected to the page for downloading the decryptor.

Screenshot of files encrypted by Asasin (36-letter and digit combination with ".asasin" extension):

Files encrypted by Asasin

Asasin ransomware removal:

Instant automatic removal of Asasin virus: Manual threat removal might be a lengthy and complicated process that requires advanced computer skills. Reimage Repair is a professional automatic malware removal tool that is recommended to get rid of Asasin virus. Download it by clicking the button below:
▼ DOWNLOAD Reimage Repair 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 Reimage Repair.

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 Asasin 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 Asasin 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 Asasin 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 Asasin 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 Asasin, 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 Asasin 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 Asasin ransomware: