Crypt0r Ransomware

Also Known As: Crypt0r virus
Distribution: Low
Damage level: Severe

Crypt0r ransomware removal instructions

What is Crypt0r?

Crypt0r is categorized as malicious program, a ransomware-type virus. Like most computer infections of this type, cyber criminals use it with a purpose to encrypt data (block access to it) and to make ransom demands. Ransom note can be found in a text file named "_HELP.txt". As a rule, ransomware-type programs rename encrypted files by adding a new extension, in this case it is a unique victim's ID (in our case it is ".aqhATfjK"). For example, if the file was named "1.jpg", then after encryption it gets renamed to "1.jpg.aqhATfjK" and so on. Crypt0r runs a process in Task Manager, it is a process with a name of a random string. This infection was discovered by MalwareHunterTeam.

According to the "_HELP.txt" ransom note, cyber criminals who developed Crypt0r ransomware have encrypted all data. They offer a decryption service (tool/key) that can be acquired by contacting them via and providing the appointed personal ID. It is unknown what cryptography algorithm (symmetric or asymmetric) is used to encrypt data, however, most cyber criminals use encryptions that generate unique decryption keys (no other keys can be used for decryption). Besides, they store these keys in remote servers that are controlled only by them. Simply said, most of the times ransomware developers are the only ones who have the right tool (key) that is required for a successful decryption. It is unknown what is the price of it, however, it is very likely that all the details regarding the payment (ransom size and so on) are provided once cyber criminals get contacted via the aforementioned email address. However, it is not recommended to trust any cyber criminals (ransomware developers), they usually ignore their victims and paying them money (meeting their ransom demands) does not give any positive result. In other words, they do not provide the decryption tools/keys and people get scammed. Unfortunately, there is no tool that might be capable of decrypting Crypt0r's encryption for free. That is why the best and free option in this case is to use a data backup (if there is one created) and to restore files from there.

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

Crypt0r decrypt instructions

Crypt0r is one of the many ransomware-type programs out there, some other examples are Pdff, XARCryptor and Ahihi. The majority of these infections have two things in common: they are designed to encrypt data and to display ransom demanding messages. Usually its just the price of the decryption (ransom size) and the encryption algorithm is what makes these computer infections different. Typically, ransomware's victims are forced to contact its developers: most of the times used encryption cryptographies are impossible to 'crack'. For this reason we recommend to create backups regularly and store them in remote servers or unplugged storage devices. Storing backups on a computer will result in its encryption together with all the other regular data.

How did ransomware infect my computer?

It is very likely that Crypt0r's developers proliferate this virus using one of these most commonly used ways: spam (email) campaigns, trojans, fake software update tools/fake updaters and untrustworthy software download channels. Email spam campaigns are used to proliferate various infections via malicious attachments. Typically, ransomware developers attach Microsoft Office document, archive file, PDF document, executable file or some other file and hope that people who received it will download and open it. If opened, these attachments infect computers by downloading and installing various viruses such as ransomware. Trojans, on the other hand, in order to cause infections must be already installed. Once installed, they cause chain infections: these malicious programs are designed to spread other threats/infections. Fake software updaters cause infections by downloading and installing viruses instead of the updates, or by exploiting outdated software's bugs, flaws. Untrustworthy software download sources such as various free file hosting and freeware download websites, peer-to-peer networks (torrent clients, eMule, etc.), software downloaders/installers other similar channels can be used by cyber criminals who infect computers by presenting infected files as legitimate. In such cases people get tricked into downloading and installing malicious programs by themselves.

How to protect yourself from ransomware infections?

To prevent computers from being infected through malicious attachments (or web links), avoid opening them if they are received from unknown/suspicious addresses or are presented in irrelevant emails. Download software using direct links, trustworthy and official sources only. We do not recommend to use various third party downloaders, installers and other unreliable sources that we mentioned earlier. There are many cases where these tools are used to proliferate rogue apps that cause computer infections or other problems. Update software using tools or implemented functions that are provided by official software developers only, various third party tools should never be used. And finally, having a reputable anti-virus/anti-spyware installed and keeping it enabled at all times can be very helpful too. There is a high possibility that these tools will be able to stop infections before they can spread or do any damage to a computer or operating system. If your computer is already infected with Crypt0r, we recommend running a scan with Spyhunter for Windows to automatically eliminate this ransomware.

Text presented in Crypt0r ransomware's text file ("_HELP.txt"):

All your files and documents are encrypted by Crypt0r.

We provide a decryption service. If you need our help, contact our customer service via mail:

All we need is your personal service ID: -

Screenshot of files encrypted by Crypt0r:

Files encrypted by Crypt0r

Screenshot of the Crypt0r's malicious process running in Task Manager (named as a random string, like "89f35f20..."):

crypt0r malicious process in task manager

Crypt0r ransomware removal:

Instant automatic removal of Crypt0r 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 Crypt0r 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 Crypt0r 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 Crypt0r 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 Crypt0r 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 Crypt0r 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 Crypt0r, 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 Crypt0r ransomware.

Note that Windows 10 Fall Creators Update includes "Controlled Folder Access" feature that blocks ransomware attempts to encrypt your files. By default this feature automatically protects files stored in Documents, Pictures, Videos, Music, Favorites as well as Desktop folders.

Controll Folder Access

Windows 10 users should install this update to protect their data from ransomware attacks. Here�s more information on how to get this update and add additional protection layer from ransomware infections.

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 Crypt0r ransomware: