.CYRON File Virus (CYRON INSTALLED) – Remove + Restore Files

.CYRON File Virus (CYRON INSTALLED) – Remove + Restore Files

This article is created to help you remove Cyron ransomware virus from your computer and restore files encrypted with the .CYRON file extension added to them.

The end of August has seen the activation of multiple new ransomware variants. One of those is called Cyron and this virus aims to encrypt the files on the infected computers by it with AES algorithm and then demand from victims to pay 50 euros via PaySafeCard as a ransom to get back the encrypted files. If you have become a victim of this ransomware virus and your files have the .CYRON file extension appended to them, we strongly advise you to focus on removing it and restoring your files. Further information you can find in this article.

Threat Summary

TypeRansomware, Cryptovirus
Short DescriptionAims to render your important files useless and get you to pay a ransom of 50 euros to get them to work again.
SymptomsFiles are encrypted with the added .CYRON file extension. A lockscreen, called CYRON INSTALLED appears on the desktop.
Distribution MethodSpam Emails, Email Attachments, Executable files
Detection Tool See If Your System Has Been Affected by CYRON


Malware Removal Tool

User ExperienceJoin Our Forum to Discuss CYRON.
Data Recovery ToolWindows Data Recovery by Stellar Phoenix Notice! This product scans your drive sectors to recover lost files and it may not recover 100% of the encrypted files, but only few of them, depending on the situation and whether or not you have reformatted your drive.

Cyron Ransomware – Distribution Methods

Cyron is a typical ransomware infection which uses an infection file to spread. Usually, such files are loaders, droppers, Trojans or simply malicious codes embedded as macros on Microsoft Office documents. But the ransomware may also exist as a JavaScript code embedded in malicious web links, even though it is less likely, because such links become no longer operational, once they are flagged by antivirus companies as malicious.

The most likely method by which your computer could have become infected with this ransom virus is via e-mail spam distributing either malicious web links or malicious files like the example images shown below:

After the victim opens the malicious attachment or clicks on the URL, a file may be automatically downloaded on his computer. These files usually pretend to be documents of importance, like receipts, invoices or other of such nature. Once the victim opens those files, infection is immediate.

Other methods by which cyber-crooks can slither Cyron ransomware on your computer are often to use a fake installer of software, fake game cracks, patches or another type of fraudulent programs, which the victim may download by searching for them on suspicious websites.


Once an infection with the .CYRON file virus takes place, the malware may take advantage of unsecured ports on your computer and via them, establish a hidden connection to download it’s payload files, used for the encryption and ransom message. The payload files are usually located under different names in the following Windows directories:

As soon as Cyron has downloaded the payload, it may execute a batch file, that may not only shut down secure Windows processes but may also delete the Windows Shadow Volume Copies on your computer. This is achieved if Cyron obtains the privileges to execute the following command as an administrator on your computer:

→ vssadmin.exe delete shadows /all /quiet & bcdedit.exe /set {default} recoveryenabled no & bcdedit.exe /set {default} bootstatuspolicy ignoreallfailures

When this is done, Cyron ransomware may also conduct various other activities, such as create registry entries in multiple different Windows registry keys. The most often targeted Windows registry sub-keys are the Run and RunOnce keys, responsible for running files automatically when you turn on your PC. They have the following locations:


Besides encrypting the files, other activities of CYRON ransomware are to drop its lock screen software, which aims to notify you of its presence on your computer via the following message:

Text from image:

We have to lock your Computer in this regard until the Police visited you.
We detected Children Pornsites in your Browser History
You don’t have a Key already?
No Problem you can buy it via E-Mail
Enter Key to unlock your Computer and get your Deleted Files back:
Just write an E-Mail to [email protected]
After you send us a PaySafeCard with 50€ and your Computerlnformations that we know what target we have to send the Key
We the government’s July 31 order directing internet Service Providers (ISPs) to block 857 porn sites came after Additional Solictor General Pinky Anand conveyed to the Department of Electronics and Information Technology (DeitY) the Supreme Court’s observation
that “appropriate steps” were needed against pornographic sites, especially those featuring child pornography. So now we developed CyRoN that doing our work a lot easier, for example we detected 349 pedophiles in 2 weeks.

Pretending it has caught you with child porn, this nasty virus asks you to pay a “fee”to redeem yourself. Nasty business, indeed.

CYRON Ransomware’s Encryption

The encryption process of CYRON ransomware is conducted by firstly scanning for your important files. To do this, CYRON may have a pre-configured list of file types to look for based on their extensions. The extension list includes the most often used files in Windows, among which are the following:


If CYRON detects some of those files, the ransomware virus immediately starts encrypting them, while skipping important Windows system files, so that you can still use your computer after encryption. The encryption process is conducted by altering segments or blocks of data from the original file structure with code from the AES encryption algorithm. These blocks of data are replaced with the cipher and this results in the files looking like the image below:

Remove CYRON INSTALLED and Restore .CYRON Encrypted Files

There are several options you can choose from if you have been infected by this virus. One is to pay the ransom, but this is highly inadvisable, because you may not get them back and you support criminal activity too. So, the other option is to remove CYRON ransomware after backing up your encrypted files to recover them later on without having to pay the ransom. For the removal of this virus, we recommend that you follow the instructions below. Even though manual removal is a good idea, it may take some time and you need to have experience in malware removal. This is why, to remove all objects that have been created by CYRON ransomware on your computer, experts often advise victims to use a ransomware-specific removal software. Such will make sure all the objects of the .CYRON file virus are detected and deleted safely and will protect your computer in real-time as well.

To try and recover files that have been encrypted by CYRON, you can either back them up and wait for researchers to develop a decryptor, which if out, we will link in this article. And your other option is to try out our alternative methods in step “2. Restore files encrypted by CYRON” below. They are not 100% effective, but they may help you recover at least some of your files without paying the ransom. Furthermore, be advised that if you are going to try them out, do not use your original encrypted files and create copies instead, just for safety precautions, because encrypted files can be damaged indefinitely quite easily.

Ventsislav Krastev

Ventsislav has been covering the latest malware, software and newest tech developments at SensorsTechForum for 3 years now. He started out as a network administrator. Having graduated Marketing as well, Ventsislav also has passion for discovery of new shifts and innovations in cybersecurity that become game changers. After studying Value Chain Management and then Network Administration, he found his passion within cybersecrurity and is a strong believer in basic education of every user towards online safety.

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