ZyNoXiOn ransomware: what it is and how to remove it
ZyNoXiOn ransomware is the virus that compromises common files found on the machine and marks them using .ZyNoXiOn extension that is placed after the original name and the file type marker. It targets photos, images, video, and audio files first, affects databases and archives by encrypting them.
Facts checked October 7, 2026. Removal steps tested on Windows 11 (26H2) and checked against Microsoft's and the browser makers' current documentation. Sections marked as our earlier report are the original text: they describe the threat as it was then and have not been reviewed since. The 2026 status, the removal steps and the questions are current.
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ZyNoXiOn ransomware: summary
| Distribution | Ransomware use typical methods of spreading such powerful malware. Techniques include malicious files that can be attached to spam emails, placed in pirated software packages or delivered with the help of exploit kits, malicious sites, or even additional malware[2] |
|---|---|
| Name | ZyNoXiOn ransomware |
| Family | Xorist cryptovirus |
| File marker | .ZyNoXiOn extension gets added at the end of every file encrypted by this virus and indicates particular data that is affected and unreachable |
| Ransom note | HOW TO DECRYPT FILES.txt; the text is quoted in full below |
| Ransom amount | This version demands 0.13 of Bitcoin for the decryption key that should help recover files completely |
| Removal | Scan the PC with security software to find and remove the malware and anything installed with it. Fortect scans Windows for malware and repairs the system files and settings it damaged. Remove it nowTo use the full-featured product, you have to purchase a license for Fortect. The scan is free. |
Show 13 more facts
| Contact email | zynoxion@protonmail.com |
|---|---|
| Decryption | Unfortunately, the ZyNoXiOn ransomware decryption tool is not developed in particular, but you can find Emsisoft's decryption tool for the Xorist malware family. It may not be updated yet or not work for newest variants, but you can at least try |
| Detection names | No Microsoft detection name is known |
| Encrypted file extension | .zynoxion |
| Decryptor | No free decryptor is known for this variant; check No More Ransom (nomoreransom.org) for updates |
| Damage | Not recorded in the old report |
| Type | File-encrypting ransomware |
| Symptoms | Files renamed with a new extension and a ransom note left in folders |
| Evidence | 5 write-ups by security sites; no sample analysed yet |
| Encrypted files | .zynoxion |
| Free decryptor | No free decryptor is known (checked 7 October 2026) |
| First seen | 7 April 2020 |
| Facts checked | 7 October 2026 |
- File extension:
.zynoxion - Note file:
HOW TO DECRYPT FILES.txt
From our report of Apr 2020 · not reviewed since
More from our earlier report on ZyNoXiOn ransomware
- The same demanding note is placed in the text file named HOW TO DECRYPT FILES.txt and on the pop-up error window.
- The message includes content email, victims' ID, ways to get the cryptocurrency and walled address where the money should go
- To completely remove ZyNoXiOn ransomware, you should go through the steps of proper cryptovirus termination that include anti-malware or security tools like or as the first ant the most important stage
- As for the system recovery after such infection, you need additional help from PC repair tools or system optimizers that can repair virus damage and fix affected or corrupted files in system folders.
- can find and even fix these problems with affected OS functions
The ZyNoXiOn ransomware note
ATENTION!!!
I am truly sorry to inform you that all your important files are crypted.
Atention! I do not offer for free the decrypt key's, for that you have to pay 0.13 BITCOIN.
You can get bitcoin very easy on this sites:
www.localbitcoins.com
www.paxful.com
You have to create an account and to buy 0.13 BITCOIN from a seller located in your city.
Then you have to send the amount at this BTC address: [payment address omitted]
After that, contact me at this email address: zynoxion@protonmail.com
With this subject: ZYNOXION
After the payment you will receive the key's to decrypt your files and a tutorial
Here is another list where you can buy bitcoin:
hxxps://bitcoin.org/en/exchanges
How to remove ZyNoXiOn ransomware
Tools you'll need
All of these are free except where noted. Download them on a clean device if the infected PC is offline.
- A USB stick: to keep the ransom note, two or three encrypted files and screenshots off the infected PC.
- Microsoft Defender Offline: built into Windows 11 and Windows 10; scans before Windows starts, so running malware cannot hide.
- Microsoft Safety Scanner: a second, portable scanner with current signatures; each download works for 10 days.
- ID Ransomware: identifies the family from the note and one encrypted file and says whether a decryptor exists.
- No More Ransom: the free decryptors from police and security companies; check it again every few months.
- Fortect (optional): scans Windows for malware and repairs the system files and settings it damaged. The free scan is in the box above.
How to remove ZyNoXiOn ransomware and get your files back
Work in this order.
Disconnecting comes first, removal comes before any restore, and nothing here asks you to contact the attackers.
Step 1: Disconnect the PC and unplug backup drives
Unplug the network cable or turn off Wi-Fi, and disconnect USB drives, external disks and network shares, so ZyNoXiOn ransomware cannot reach more files. Pause OneDrive, Google Drive or Dropbox sync, because synced folders upload the encrypted copies over the good ones.
Leave the PC on but offline while you read the next steps, since a restart can let the ransomware run again. This applies to Windows 11 and Windows 10 alike.

Windows 11: turn off Wi-Fi to take the PC offline. Full procedure with screenshots: Ransomware: first steps, finding a decryptor and recovering files
Step 2: Save the ransom note and confirm the family
Your files now end in
.zynoxionand the instructions are inHOW TO DECRYPT FILES.txt. Save both to a USB stick, a copy of the note and two small encrypted files, before anything else.On another device, check them with ID Ransomware or Crypto Sheriff: the family name decides which decryptor, if any, can help. Keep the note's ID and contact line for your report.

Windows 11: the ransom note and encrypted files to copy for identification. Full procedure with screenshots: Ransomware: first steps, finding a decryptor and recovering files
Step 3: Check for a free decryptor
Our last check found that for ZyNoXiOn ransomware, no free decryptor is known (checked 7 October 2026). Look again yourself in the No More Ransom list and the free decryptor pages of Emsisoft, Avast and Kaspersky, which add new families every year.
A decryptor needs the ransomware gone first, or it encrypts the files again. Keep at least one copy of the encrypted files on an external drive, even if no tool works yet.
Full procedure with screenshots: Ransomware: first steps, finding a decryptor and recovering files
Step 4: Remove the ransomware before you restore or decrypt
Removing ZyNoXiOn ransomware does not bring the files back, but it has to come first. Start with Defender's Full scan, then the offline scan from the same Scan options page, which checks the disk before Windows loads.
If the scan cannot start, use Safe Mode with Networking. Delete the ransom notes only after you have saved a copy, because removal tools sometimes leave them behind on Windows 11 and Windows 10.

Windows 11: Windows Security > Virus & threat protection > Scan options. Full procedure with screenshots: Run a Microsoft Defender Offline scan
Step 5: Look for shadow copies of the files
Windows keeps shadow copies for restore points and backups, and some ransomware fails to delete them.
vssadmin list shadowsin an administrator Command Prompt tells you at once whether any exist.If they do, right-click the folder that held your files, open Properties > Previous Versions, select a version from before the attack, and click Open to check it before you Restore or copy the files out. Windows 11 and Windows 10 both have the tab.

Windows 11: vssadmin list shadows shows whether shadow copies exist. Full procedure with screenshots: Ransomware: first steps, finding a decryptor and recovering files
Step 6: Restore the files from a backup or recover deleted originals
A backup made before the attack is the surest way back. Connect it only once the PC is clean, then restore from File History, Windows Backup, OneDrive's Restore your OneDrive or your own external copies.
Without a backup, try file recovery: the originals that ZyNoXiOn ransomware deleted may still be on the disk until something overwrites them. Install nothing new on the drive you want to recover from on the Windows 11 or Windows 10 PC.
Full procedure with screenshots: Recover deleted files (Recycle Bin, backups, OneDrive) On uGetFix
Instructions for each browser and system
The detailed steps for every browser and system this guide covers. Open the one you use.
Manual removal using Safe Mode
Important! →
Manual removal guide might be too complicated for regular computer users. It requires advanced IT knowledge to be performed correctly (if vital system files are removed or damaged, it might result in full Windows compromise), and it also might take hours to complete. Therefore, we highly advise using the automatic method provided above instead.
Step 1. Access Safe Mode with Networking
Manual malware removal should be best performed in the Safe Mode environment.
Windows 7 / Vista / XP
- Click Start > Shutdown > Restart > OK.
- When your computer becomes active, start pressing F8 button (if that does not work, try F2, F12, Del, etc. - it all depends on your motherboard model) multiple times until you see the Advanced Boot Options window.
- Select Safe Mode with Networking from the list.

Windows 10 / Windows 8
- Right-click on Start button and select Settings.

- Scroll down to pick Update & Security.

- On the left side of the window, pick Recovery.
- Now scroll down to find Advanced Startup section.
- Click Restart now.

- Select Troubleshoot.
- Go to Advanced options.

- Select Startup Settings.

- Press Restart.
- Now press 5 or click 5) Enable Safe Mode with Networking.

Step 2. Shut down suspicious processes
Windows Task Manager is a useful tool that shows all the processes running in the background. If malware is running a process, you need to shut it down:
- Press Ctrl + Shift + Esc on your keyboard to open Windows Task Manager.
- Click on More details.

- Scroll down to Background processes section, and look for anything suspicious.
- Right-click and select Open file location.

- Go back to the process, right-click and pick End Task.

- Delete the contents of the malicious folder.
Step 3. Check program Startup
- Press Ctrl + Shift + Esc on your keyboard to open Windows Task Manager.
- Go to Startup tab.
- Right-click on the suspicious program and pick Disable.

Step 4. Delete virus files
Malware-related files can be found in various places within your computer. Here are instructions that could help you find them:
- Type in Disk Cleanup in Windows search and press Enter.

- Select the drive you want to clean (C: is your main drive by default and is likely to be the one that has malicious files in).
- Scroll through the Files to delete list and select the following:
Temporary Internet Files
Downloads
Recycle Bin
Temporary files - Pick Clean up system files.

- You can also look for other malicious files hidden in the following folders (type these entries in Windows Search and press Enter):
%AppData%
%LocalAppData%
%ProgramData%
%WinDir%
After you are finished, reboot the PC in normal mode.
From our report of Apr 2020 · not reviewed since
ZyNoXiOn ransomware is the cryptovirus that encourages people to pay for the alleged decryptor by showing the error window with the ransom message
ZyNoXiOn ransomware is the virus that compromises common files found on the machine and marks them using .ZyNoXiOn extension that is placed after the original name and the file type marker. It targets photos, images, video, and audio files first, affects databases and archives by encrypting them.
Then malware moves on to system folders and function corruption when the payment in cryptocurrency is demanded in various ransom-demanding files. The text file HOW TO DECRYPT FILES.txt and the error pop-up window displays the same text that includes a particular amount of Bitcoin that criminals want to get, 0.13BTC, for example.
Also, these messages contain instructions and tips on where to get cryptocurrency online, so you can pay the criminals. Since the extension is the same for all the victims, there is a particular identification key that is generated during the encryption process for each unique victim.
ZyNoXiOn ransomware virus developers ask to write them via the email and include that ID on the subject line when you send the email to zynoxion@protonmail.com address. However, this is not recommended because you may get exposed to additional malware-related content instead of getting the proper decryption tool or key for the software.
Especially since this is the more recent version of the Xorist ransomware. There are some tools for decryption of variants that fall from the same branch, but this is the newest version that hasn't been analyzed enough to confirm that decryption tools can work, but try the Emsisoft Decrypter for Xorist or store those files and hope for better luck later on.
Nevertheless, you need to clean the machine and get rid of the virus completely before you add backup files or try data recovery. If you load new files on the machine all of them might bet encrypted again and damaged permanently.
ZyNoXiOn ransomware is the encryption-based threat or a product from cryptocurrency extortionists. People behind the malware can be set to spread additional malware on the machine to collect information from your computer directly for future blackmailing purposes or load another encryption to damage your data permanently.
This can happen pretty quickly, so as soon as you get the pop-up error with the message that your files got encrypted, think about the possibilities of virus termination.
When ZyNoXiOn ransomware delivers the demanding message using HOW TO DECRYPT FILES.txt file or the error window, file-locking is done, and data became useless. For more gullible users this note can be very scary, and they follow instructions and transfer money straight after getting the following message:
However, there are fewer reasons to pay than to remove ZyNoXiOn ransomware from your machine ASAP. Paying gives no results, in most cases, because criminals focus on getting money without even batting an eye when it comes to your belongings. Remember that Xorist is active since 2016, so these criminals may be more notorious than you think.
This is one of 20 versions in the same family, so coding of the ZyNoXiOn ransomware may be improved and updated a few times that makes the encryption permanent and difficult to decode and decrypt. Try to stay away from contacting extortionists and clicking on anything that can be associated with malware itself. You may get exposed to more dangerous material without even noticing.
ZyNoXiOn ransomware removal can get even more difficult when malware deletes or affects files, functions, programs of the machine. When malware controls processes and general functions of the computer, your AV tools cannot find and remove the intruder properly. Safe Mode with networking can be a great function that helps anti-malware tools to run as they supposed to. Check all the additional tips below the article for the in-depth instructions.
As for the selection of security or anti-malware tools, you need to take the detection rate of ZyNoXiOn ransomware into consideration. Not all tools use the same database, so not every anti-malware program can detect this threat right now,u until the proper update of the malware database. You can use a few tools, alternate AV detection engines to double-check and be sure that computer is virus-free.
Then, you can run or a different program designed to recover system files and functions, o any damage or corrupted files, affected processes get repaired fully. ZyNoXiOn ransomware interferes with the Windows registry, but altering such parts manually can be damaging. Rely on automatic tools that are designed to help you.
When the proper system functions get repaired, you can focus on recovering files that ZyNoXiOn ransomware encrypted. Data backups stored on external devices or cloud services work the best since these files are direct copies of affected files. However, users may not have those files copied that got damaged. In such cases, thrid-party recovery tools come for help.
We have a few methods listed below that provide alternate file restoring services. Make sure to try at least a few of those to ensure that full data recovery after the ZyNoXiOn ransomware attack. And focus on legitimate sourf3s and official providers when you choose to get applications from the internet.


From our report of Apr 2020 · not reviewed since
Ransomware payload is spread using payload droppers and malicious files
The most dangerous cyber threats are the ones that use stealthy methods for the distribution, so payload can run before any symptoms get noticed by the victim.
The initial infiltration happens with the help of maliciosu macro viruses attached to emails that pose as legitimate notifications from companies and services. Also, such data can be included in the package of pirated software that you download from torrent sites and similar pages.
The payload dropper gets executed when the user is prompted to enable additional content, malicious script, or load the trojan/worm designed to deliver the infection further. Cryptovirus can run background processes and find all the files for encryption before you notice any speed issues, so try to avoid these silent infiltrations by:
- paying attention to suspicious emails;
- cleaning email box more often;
- looking for grammar mistakes and typos;
- keeping system and programs up-to-date using legitimate sources.
From our report of Apr 2020 · not reviewed since
Follow the virus removal guide and eliminate ZyNoXiOn files virus completely
Since this cryptovirus category is one of the most dangerous and invasive, you should react to the issue of cyber infection as soon as you can.
The best time to go for ZyNoXiOn ransomware removal is the minute you receive a money-demanding note on the screen. It happens when malware is done with encryption, but system changes might not be started yet, so you have more time to achieve the best results.
When the virus manages to alter various system files and disable functions of the operating system, it becomes difficult to remove ZyNoXiOn ransomware. When you rely on proper anti-malware programs or security tools like or , you can run the full system scan and allow the application to find any traces of malicious intruders, programs related to the cryptovirus and the ransomware itself.
ZyNoXiOn ransomware virus can get detected and removed this way. Of course, there are many tools like this, so not every one of them has the same database and can find a particular threat, so rely on a few alternate apps to double-check. Before going forward with data recovery, you should make sure that system files are repaired and all the virus damage removed.
[GI=method-1]Reboot the machine in Safe Mode with Networking and then run the AV tool. This way application can remove ZyNoXiOn ransomware completely
[GI=method-2]System Restore can recover your machine to a previous state when the virus was not active
This program also helps with accidentally deleted files
Windows Previous Versions can individually recover your encoded files
When System Restore gets enabled, you can use Windows Previous Versions as alternate file recovery option
Shadow Explorer for files encoded by ZyNoXiOn ransomware
When ransomware leaves Shadow Volume Copies untouched, you can rely on ShadowExplorer and restore all the files
Decryptor for ZyNoXiOn ransomware is not developed, but there is a tool that might work
This virus is a version of Xorist ransomware, so Emsisoft has the tool that may for your encrypted files
Report it and recover your files
Report it
Report the attack even if you do not expect the files back: insurers and banks ask for the report number, and police use the contacts in the note to link cases.
- United States
- FBI IC3 · FTC ReportFraud
- United Kingdom
- Report Fraud (formerly Action Fraud) · NCSC
- Australia
- ReportCyber (ASD)
- EU countries
- Europol: national reporting sites
Give the victim ID, the note and the date the files were encrypted. A business that holds personal data may also have to notify its data protection authority, in the EU within 72 hours.
Protect the files you restore
Restore only after the scans are clean and the PC no longer shows files that end in .zynoxion and no longer open; otherwise the restored copies can be damaged again.
Then build a backup that survives the next infection:
- one copy in the cloud with version history
- one on an external drive that is disconnected between backups
- the working copy on the PC
Version history matters because a backup that syncs damaged files overwrites the good ones.
How to do this with the tools built into Windows: the 3-2-1 backup rule on Windows.
Protect your privacy - employ a VPN
There are several ways how to make your online time more private - you can access an incognito tab.
However, there is no secret that even in this mode, you are tracked for advertising purposes. There is a way to add an extra layer of protection and create a completely anonymous web browsing practice with the help of VPN. This software reroutes traffic through different servers, thus leaving your IP address and geolocation in disguise.
Besides, it is based on a strict no-log policy, meaning that no data will be recorded, leaked, and available for both first and third parties. The combination of a secure web browser and VPN will let you browse the Internet without a feeling of being spied or targeted by criminals.
No backups? No problem. Use a data recovery tool
If you wonder how data loss can occur, you should not look any further for answers - human errors, malware attacks, hardware failures, power cuts, natural disasters, or even simple negligence.
In some cases, lost files are extremely important, and many straight out panic when such an unfortunate course of events happen. Due to this, you should always ensure that you prepare proper data backups on a regular basis.
If you were caught by surprise and did not have any backups to restore your files from, not everything is lost. is one of the leading file recovery solutions you can find on the market - it is likely to restore even lost emails or data located on an external device.
Questions about ZyNoXiOn ransomware
Should I pay the ransom in HOW TO DECRYPT FILES.txt?
Not before you have tried everything else. Identify the family from HOW TO DECRYPT FILES.txt and one encrypted file, check No More Ransom for a free decryptor, and look for clean copies in OneDrive, backups and Previous Versions.
Paying funds further attacks, may be illegal if the group is sanctioned, and is no promise of a working key: many victims get partial or broken decryption. If you consider paying for business-critical data, involve the police and a professional incident responder first, and never pay through intermediaries who promise their own decryption.
How do I open .zynoxion files?
You cannot open them by renaming or by choosing another program. The .zynoxion ending shows that ZyNoXiOn ransomware encrypted the content, and only the matching key can reverse it. Renaming a file back to .docx or .jpg changes nothing except the icon, and it can confuse a future decryptor, so leave the names as they are.
To get the content back, use a backup, an unencrypted copy elsewhere, or a decryptor listed on No More Ransom if one exists for ZyNoXiOn ransomware. Store the encrypted files on an external disk until then.
How did ZyNoXiOn ransomware get on my computer?
The way ZyNoXiOn ransomware spreads has not been documented yet, so look at your own recent activity. On home PCs, ransomware most often comes with cracked programs, game cheats, key generators and fake updates, or with an e-mail attachment that was opened. On business networks, attackers usually log in through Remote Desktop with a stolen or guessed password.
Think back to what was downloaded or installed in the days before files that end in .zynoxion and no longer open, and check the Downloads folder and Installed apps sorted by date. Keep anything suspicious for your report, but do not run it again.
Is there a free ZyNoXiOn ransomware decryptor?
We last checked on 7 October 2026, and for ZyNoXiOn ransomware no free decryptor is known. We check No More Ransom, which collects free tools from police and security companies, and the decryptor pages of the major antivirus vendors. A working decryptor exists only when the encryption has a flaw or the keys were leaked or seized.
Ignore sites and videos that offer a "ZyNoXiOn ransomware decryptor" for download or for a fee: these are usually scams or malware. Real decryptors are free and come from known security companies or law enforcement. Keep the encrypted files in case a tool appears later.
Can a data-recovery company decrypt my files for a fee?
Only if a decryptor already exists or the company pays the attackers for you. Some "ransomware recovery" services advertise that they can decrypt families with no known flaw; in practice they negotiate with the attackers and add their own fee. Others use the same free tools listed on No More Ransom.
Before you hire anyone, ask in writing how they will recover the files, whether they will contact the attackers and what happens if they fail. A legitimate service answers clearly. If a free decryptor exists for your family, you can run it yourself.
Did ZyNoXiOn ransomware steal my files or passwords?
We do not know yet. Nothing published so far shows data theft by ZyNoXiOn ransomware, but the only confirmed sign is files that end in .zynoxion and no longer open, which says nothing about what happened before. Many current ransomware attacks copy files or run a password stealer first, so it is wise to act as if they did.
From a clean device, change the passwords that were saved in the browsers on this PC, starting with e-mail and banking, sign out of all sessions and turn on two-step verification. Watch bank statements and account activity for the next few weeks.
Is ZyNoXiOn ransomware the same as other ransomware with a similar name?
Not necessarily. Ransomware names come from the file extension, the note or a word in the code, so unrelated families often end up with similar names, and one family can appear under several names. The difference matters: a decryptor or advice for one family does not fit another and can damage files.
Compare the ending added to your files and the exact name of the note with the summary table at the top of this guide, then upload the note and one encrypted file to ID Ransomware from a clean device. If the result names another family, follow the guide for that family instead.
Can I just remove .zynoxion from the file names?
You can try it on a copy, but for real ransomware it will not help. The .zynoxion extension is only a label; the file content has been scrambled with a key the attackers hold.
If a renamed copy opens normally, the malware only renamed files, which happens with some fake ransomware, and you can rename the rest back. If it does not open, leave the files as they are. Renaming encrypted files can confuse a decryptor later, so always work on copies.
Should I open HOW TO DECRYPT FILES.txt?
Reading it is fine if you open it in Notepad. A plain text HOW TO DECRYPT FILES.txt cannot harm the PC. Be careful with notes in HTA or HTML format: double-clicking those runs them in a window that can contain scripts, so right-click and choose Open with > Notepad instead.
The note tells you the contact addresses, the claimed amount and the deadline. Do not visit links or write to the addresses from this PC. Use the note to identify the family and check for a free decryptor first.
Will Fortect remove ZyNoXiOn ransomware?
Fortect scans Windows for malware and unwanted programs and repairs the system files and settings they change, and its free scan shows what it finds on your PC before you decide anything.
For ZyNoXiOn ransomware, follow the plan above as well: the browser steps take back permissions and settings that no scanner treats as a threat, and uninstalling the program that brought it removes the source.
Run Microsoft Defender's full scan and, if anything was found, its offline scan as a second opinion. If the symptoms are gone after the plan and both scans are clean, there is nothing more to do.
Sources
- CSOonline: Ransomware explained: How it works and how to remove it (read October 7, 2026)
- Vice: Cybercriminals Found a Scary New Way of Making Hacked Companies Pay Ransom (read October 7, 2026)
- VirusTotal: Detection rate of malicious payload file (read October 7, 2026)
- Microsoft: Macro malware (read October 7, 2026)
- CISA: StopRansomware (read October 7, 2026)