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ASN1 ransomware virus. How to remove? (Uninstall guide)

removal by Jake Doevan - - | Type: Ransomware

ASN1 ransomware uses Rig exploit kit for its distribution

ASN1 virus is a dangerous ransomware which started its distribution in Italy, Greece, Serbia and the United States. Now it can be found in almost every world’s country. In the beginning, this virus seemed to be in a relatively low stage of distribution. Nevertheless, ASN1 ransomware is not in the developmental process anymore, so the amount of affected PC users can go higher. According to the latest news, malware has started spreading with the help of Rig exploit kit, so there is no doubt that the true intensions of hackers have increased.

Looking at its coding peculiarities, ASN1 ransomware can hardly compete with such ransomware giants as Locky, CryptoWall or Cerber. However, it does not mean that it is not capable of inflicting as much damage as other viruses do. Just like any other ransomware, this parasite encodes user’s documents, pictures, archives and other personal information with AES and RSA ciphers, making the encrypted files inaccessible. It hasn’t been leaving any file extensions to these files, so they seem normal until you try opening them. Virus can also delete Volume Shadow Copies for ensuring that there is no way for the user to recover them. Currently, there is no alternative decryption software that would help victims recover the locked files. However, you should not think about paying to the extortionists as well because the functionality of their decryption software is not guaranteed. Thus, ASN1 removal and the use of backups is the safest option you have. You can use Reimage anti-malware software to fix your PC, while the data recovery solutions will be provided at the end of the article.

Another thing that allows us to define ASN1 as a ransomware-in-the-making is the fact that it does not add any visible extensions to the files it encrypts. Extension alteration has become one of the main signatures of ransomware-type viruses, so in this respect, ASN1 is somewhat deviant. Although this parasite does not bring extension changes, there is no way its developers could have missed the ransom note. The criminals encourage to read this note by placing a pop-up message on the infected computer’s desktop:

1. Download and install TOR browser (recommended) or use your standard browser.
2. Follow the link that was generated for you.
3. On the next page you will see a Bitcoin wallet to pay, after you pay, you will get the key for decrypting your files.
4. Highlight (CTRL + A) and copy (CTRL + C) the key in clipboard, decoding will start.
5. Please, do not open files during decryption – opened files can not be decrypted.

Once the provided link is clicked, the Internet browser opens a !!!!!readme!!!!!.html file which provides further information and instructions for the data recovery. We should note that initially, the note was delivered in Italian, but you can now find its variant in English that go as follows:

Your files were encrypted!
1(0) BTC -> [Bitcoin wallet address] (4:23:59:49)
For getting decryption key, you must pay amount, written above, to the bitcoin address, written above. Amount in brackets indicates already paid amount. For buy bitcoin online, google it now. This page will refresh every 120 seconds. If you already paid, please, wait for page refreshing.
If software was deleted, download it now . Absence of payment during next five days will double the amount.
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This document gets dropped on every folder that contains infected files. The ransom that the extortionists demand fluctuates between 0.25 to 1 Bitcoin, but as we have already mentioned, it is extremely risky to have any financial business with the cyber criminals. They may fail to deliver the Segui.exe file which supposedly contains the data decrypter, and you will be robbed off your files as well as your money. However, if you remove ASN1 ransomware from your computer, you still stand a chance to decrypt your files and, most importantly, protect your banking details from getting leaked.

Ransomware infiltration and preventative measures that can stop it:

Though ASN1 is not an entirely typical ransomware, it’s developers are probably employing typical ways to distribute the ransomware around. It is most likely that this virus will try to enter your computer disguised as a legitimate Adobe Flash or Java software update. You can also get infected with ASN1 after interaction with links delivered by spam emails. It is always important to stay vigilant and avoid such encounterings, but accidents do happen, and you can get infected without even suspecting it. For such emergency cases, it is recommended to make data backups, renew them regularly and keep them in safe external storage drives.

The easiest ASN1 removal options:

You can remove ASN1 virus or any other potentially unwanted program from the infected device safely by using an automatic anti-malware software. However, when dealing with ransomware infections, especially the ones that are constantly undergoing various changes various difficulties may arise. For instance, you may not be able to initiate the automatic ASN1 removal because the malicious processes might be blocking your antivirus from operating. We have prepared a guide that should help eliminate this obstacle and allow you to proceed with the virus elimination smoothly.

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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 ASN1 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.
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To remove ASN1 virus, follow these steps:

Remove ASN1 using Safe Mode with Networking

To disable ASN1 ransomware and initiate a full removal of its files, you can try the following steps. However, make sure you repeat the scan in normal mode as well.

  • 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 ASN1

    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 ASN1 removal.

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

Remove ASN1 using System Restore

If Safe Mode with Networking method does not help you launch your anti-spyware program, you can try System Restore option. For that, follow the steps given below.

  • 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 ASN1. 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 ASN1 removal is performed successfully.

Bonus: Recover your data

Guide which is presented above is supposed to help you remove ASN1 from your computer. To recover your encrypted files, we recommend using a detailed guide prepared by security experts.

If your files are encrypted by ASN1, you can use several methods to restore them:

Relying on Data Recovery Pro to recover files encrypted by ASN1 ransomware

If you are not willing to devote much time recovering your data, you should try out Data Recovery Pro. This tool works automatically, so you can sit back and watch as it recovers your data. Of course, there is no guarantee for 100% success, but you can still give it a try using the guidelines below.

Using Windows Previous Versions feature to recover encrypted files

For the users concerned with the recovery of some specific files, we recommend utilising the data recovery properties of the Windows Previous Versions feature. This tool only works with the System Restore function, so make sure it has been enabled before the ASN1 virus infiltration

  • Find an encrypted file you need to restore and right-click on it;
  • Select “Properties” and go to “Previous versions” tab;
  • Here, check each of available copies of the file in “Folder versions”. You should select the version you want to recover and click “Restore”.

ASN1 ransomware decrypter is not available yet

Finally, you should always think about the protection of crypto-ransomwares. In order to protect your computer from ASN1 and other ransomwares, use a reputable anti-spyware, such as Reimage, Plumbytes Anti-MalwareWebroot SecureAnywhere AntiVirus or Malwarebytes Anti Malware

About the author

Jake Doevan
Jake Doevan - Computer technology expert

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