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:
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?
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:
Screenshot of Asasin ransomware desktop wallpaper and asasin.bmp file (created on the desktop):
Text presented within files (asasin.bmp", "asasin-5eac.htm", and "asasin.htm") created by Asasin ransomware (on the desktop):
!!! IMPORTANT INFORMATION !!!!
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://en.wikipedia.org/wiki/RSAicryptosysteml hxxp://en.wikipedia.org/wiki/Advanced_Encryption_Standard
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://www.torproject.org/download/download-easy.html 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:
Text presented within this website:
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):
Asasin ransomware removal:
- What is Asasin?
- STEP 1. Asasin virus removal using safe mode with networking.
- STEP 2. Asasin ransomware removal using System Restore.
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.
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.
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.
Video showing how to start Windows 10 in "Safe Mode with Networking":
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.
Download remover for Asasin virus
1) Download and install 2) Run system scan 3) Enjoy your clean computer!
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.
2. When Command Prompt mode loads, enter the following line: cd restore and press ENTER.
3. Next, type this line: rstrui.exe and press ENTER.
4. In the opened window, click "Next".
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).
6. In the opened window, click "Yes".
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.
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 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:
Malwarebytes Anti-Ransomware Beta uses advanced proactive technology that monitors ransomware activity and terminates it immediately - before reaching users' files:
- 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: