Chimera Ransomware [Updated]

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

Chimera virus removal instructions

What is Chimera?

Chimera is a ransomware virus that encrypts files stored on infected systems. It is distributed using various false job applications, business offers, and infected email attachments. After encrypting the files, Chimera adds a .crypt extension to each file. After the infected computer is restarted, Chimera replaces the desktop wallpaper with an image containing a message, which states that payment of a ransom must be made to receive a key required for file decryption.

Chimera decrypt instructions

Payment of of a 2.45267544 Bitcoins (at time of research, equivalent to 835.4) ransom is made, otherwise personal files (pictures, videos, etc.) with users' names will be published on the Internet. Furthermore, the data will remain encrypted. Unfortunately, at time of research there were no tools capable of decrypting these files. Therefore, the only way to solve this problem is to restore your files from a backup. Bear in mind that by paying the ransom demanded simply sends money to cyber criminals, thereby supporting their malicious business. In addition, you can never be sure that your files will be decrypted. For these reasons, never attempt to contact the developers of Chimera or pay the ransom.

Following the leak of Chimera ransomware private keys Kaspersky security researchers have released a decrypter for Chimera ransomware. Download it HERE.

Screenshot of Chimera ransomware decrypter from Kaspersky:

chimera ransomware decrypter by Kaspersky

Screenshot of Chimera Decrypter (a tool developed by cyber criminals to track the payments of the ransom and to decrypt the files on victims computer):

chimera decrypter tool

Ransomware viruses such as HELP_YOUR_FILES, TorLocker, and CTB Locker are often distributed via false e-mails with infectious attachments, fake software updates (Flash player, Java, etc.), and P2P networks. For this reason, be cautious when downloading files from suspicious sources and opening unrecognized emails. This type of computer infection presents a strong case for maintaining regular backups of your files. Furthermore, keep your installed software up-to-date and use a legitimate anti-spyware or anti-virus suite.

Text presented in the Chimera's desktop wallpaper:

Your are victim of the Chimera malware. Your private files are encrypted and can not be restored without a special edgy file. Maybe some programs no longer function properly: Please transfer Bitcoins to the following address to get your unique key file. For the decryption program and additional information, please visit: If you don’t pay your private data, which include pictures and videos will be published on the Internet in relation on your name. Take advantage of our affiliate program. More information in the source code of the file.

Chimera ransomware removal:

Instant automatic removal of Chimera 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 Chimera 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, 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 "Restart now" button. Your computer will now restart into "Advanced Startup options menu". Click the "Troubleshoot" button, then click the "Advanced options" button. In the advanced option screen click on "Startup settings". Click the "Restart" button. Your PC will restart into 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":

Step 2

Log in to the account infected with the Chimera 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 Chimera 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 Chimera 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 Chimera 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 on 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 files encrypted by Chimera, 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 encrypting ransomware such as this, use reputable antivirus and anti-spyware programs. As an extra protection method, you can use programs called HitmanPro.Alert and Malwarebytes Anti-Ransomware, which artificially implant group policy objects into the registry to block rogue programs such as Chimera.)

HitmanPro.Alert CryptoGuard - detects encryption of files and neutralises such 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 Chimera ransomware:

About the author:

Tomas Meskauskas

Tomas Meskauskas - expert security researcher, professional malware analyst.

I am passionate about computer security and technology. I have an experience of over 10 years working in various companies related to computer technical issue solving and Internet security. I have been working as an author and editor for since 2010. Follow me on Twitter and LinkedIn to stay informed about the latest online security threats. Contact Tomas Meskauskas.

PCrisk security portal is brought by a company RCS LT. Joined forces of security researchers help educate computer users about the latest online security threats. More information about the company RCS LT.

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Removal Instructions in other languages
Malware activity

Global virus and spyware activity level today:

Medium threat activity

Increased attack rate of infections detected within the last 24 hours.

QR Code
Chimera virus QR code
A QR code (Quick Response Code) is a machine-readable code which stores URLs and other information. This code can be read using a camera on a smartphone or a tablet. Scan this QR code to have an easy access removal guide of Chimera virus on your mobile device.
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Platform: Windows

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