Payerranso Ransomware

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

Payerranso ransomware removal instructions

What is Payerranso?

First discovered by Leo, Payerranso is a ransomware-type virus developed using Microsoft's .Net Framework. Immediately after infiltration, Payerranso encrypts most stored data and appends filenames with the ".payerranso" extension (for example, when encrypted "sample.jpg" becomes "sample.jpg.payerranso"). Once files are encrypted, it is impossible to use them. Furthermore, Payerranso changes the desktop wallpaper and creates a text file ("Message_Important.txt"), placing a copy in every existing folder.

The desktop wallpaper and text files contain information regarding file encryption and decryption. Note that the message is translated into French and English. Therefore, the developers are from France or England, or simply target users from these countries. It is stated that the files are locked and can only be restored with a private key. Unfortunately, this information is accurate. Payerranso is designed to use RSA-2048 and AES-128 cryptographies. During encryption these algorithms generate a unique key. Note that one algorithm encrypts data, whereas the other encrypts the first algorithm's key. In other words, it is a layer-type encryption. Restoring everything without these keys is impossible. Cyber criminals store these keys (or at least the second key) on a remote server and victims are encouraged to contact these people and pay a ransom release of the keys. The cost is currently unknown (we have not contacted the criminals), however, it typically fluctuates between $500 and $1500 in cryptocurrency (most likely, Bitcoins). Despite this, no matter what the cost, cyber criminals can never be trusted. Research shows that in most cases users receive nothing in return after submitting payment. Criminals ignore users once they have paid. Therefore, you are strongly advised to ignore all requests to contact these people or pay any ransoms. There are currently no tools capable of restoring files compromised by Payerranso and the only solution is to restore everything from a backup.

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

Payerranso decrypt instructions

Payerranso is virtually identical to LOCKME, AAC, MindLost, InsaneCrypt, and many others. Although these viruses are developed by different cyber criminals, they have identical behavior - all encrypt data and make ransom demands. Most ransomware has just two major differences: 1) size of ransom, and; 2) type of cryptography used. Most employ algorithms designed to generate unique decryption keys. Therefore, unless the malware has certain bugs/flaws (e.g., the key is stored locally, hard-coded, or similar) file decryption without involvement of developers (contacting these people is not recommended) is impossible. These viruses present a strong case for maintaining regular data backups, however, note that storing backup files on a remote server (e.g., Cloud) or an unplugged external storage is paramount. If not, the ransomware encrypts the backups as with any other files.

How did ransomware infect my computer?

To proliferate ransomware developers typically employ spam emails (infectious attachments), third party software download sources (free file hosting websites, freeware download sites, P2P [peer-to-peer] networks), fake software updaters, and trojans. Malicious attachments typically come in the format of JavaScript files or MS Office documents. Once opened, attachments stealthily download and install malware. Unofficial download sources present malware as legitimate software. Therefore, users are tricked into downloading and installing viruses. Fake update tools infect the system by downloading malware rather than software updates or exploiting outdated programs' bugs/flaws. Trojans are the simplest ones - they open "backdoors" for other high-risk malware to infiltrate the system.

How to protect yourself from ransomware infections?

The main reasons for computer infections are poor knowledge and careless behavior. The key to safety is caution. Therefore, to prevent ransomware infections, be very cautious when browsing the Internet. Never open files received from unrecognizable/suspicious email addresses. Delete these emails immediately, without reading them. Download your applications from official sources only, using direct download links. Unofficial downloaders/installers should never be used, since criminals employ them to proliferate (bundle) dubious programs. Keep installed applications up-to-date, however, since criminals employ fake updaters to proliferate malware, software should be updated using implemented functions or tools provided by the official developer. Using a legitimate anti-virus/anti-spyware suite is also paramount.

Text presented in Payerranso ransomware text file ("Message_Important.txt"):

s'il vous plait veuillez contacter cette adresse email : guillaumecoudert2@gmail.com ou guillaumecoudert@yahoo.fr

il s'agit de vous aider à décrypter vos fichiers avec la clé et le programme de décryptage
please contact this email : guillaumecoudert2@gmail.com ou guillaumecoudert@yahoo.fr

it is to help you to decrypt your files

Screenshot of Payerranso desktop wallpaper:

Payerranso wallpaper

Screenshot of files encrypted by Payerranso (".payerranso" extension):

Files encrypted by Payerranso

Payerranso ransomware removal:

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 Payerranso 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 Payerranso virus
1) Download and install   2) Run system scan   3) Enjoy your clean computer!

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 Reimage.

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 Payerranso 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 Payerranso 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 Payerranso 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 Payerranso, 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 Payerranso ransomware.

Note that Windows 10 Fall Creators Update includes the "Controlled Folder Access" feature that blocks ransomware attempts to encrypt your files. By default, this feature automatically protects files stored in the 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 is more information on how to get this update and add an 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 Payerranso ransomware: