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Remove Chimera Ransomware and Restore Your Files

Name Chimera Ransomware
Type Ransomware Trojan
Short Description Encrypts user files and deletes system backup.
Symptoms A ransom note in the form of a text file, wallpaper or PC locking screensaver.
Distribution Method Spam mail, malicious sites.
Detection tool Download Malware Removal Tool, to See If Your System Has Been Affected By Chimera Ransomware

rp_ransomware-file-encryption-150x150.jpgA nasty ransomware infection, called Chimera is reported by ESG security analysts to affect victims’ computers and take their important files hostage. Like other typical ransomware trojans, the software encrypts important documents, pictures, videos or other files that are important for the user and leaves a so called ransom note, asking the victim for payment, mostly in BitCoins. What is devastating about this threat is that even if you manage to remove it using special anti-malware software, the files may remain encrypted. This is why the best defence against such files is usually a good backup of your files on your PC or in the form of copies in external memory carriers.

Chimera Ransomware – How Did I Get Infected

This particular ransomware increases the count of its victims primarily via spam mail campaigns that may look legitimate even to some experienced users. The spam mails usually may contain some of the following attachments:

→docx, jpg, bat, cmd, exe, pdf, vdi, txt

Usually a ransomware carrier email message contains more than one attachments. For example one of the attachments may be a virus free text document file. However the other one may be the virus itself. This is why it is always recommended to use mail software, such as Mozilla Thunderbird or Microsoft Outlook, because they feature spam-filters within their code.

Another way such ransomware is being distributed is via suspicious sites which may be accidentally opened by the user or be redirects caused by unwanted programs on the user PC, i.e. adware.

Chimera – More About the Ransomware

Chimera is very similar to other ransomware viruses in the sense that after it has encrypted the user data, it immediately stops any active connections to the malicious domains of the cyber criminals, running it and removes itself from the victim’s computer.

The ransomware has been reported by ESG researchers to encrypt the user files with the .crypt file extension after them, making them corrupt and it may also display the following message:

→”Sie wurden Opfer der Chimera Malware. Ihre privaten Dateien wurden verschlusselt und sind ohne eine spezielle Schliusseldatei nicht wiederherstellbar. Moglicherweise funktionieren einige Programme nicht mehr ordnungsemass!”

Also, this threat may detect the user PC’s whereabouts and display the message in different language depending on the user’s location. The message above demands targeted users (in this case from Germany) to pay a ransom using Tor networking in order to conceal the anonymity of the connection between the cyber-criminals and the ransom victim. It has also been reported to demand 0.93002414 Bitcoins from users and for those it promises the return of the decryption key necessary to decrypt user files successfully.

Removing Chimera Ransomware and Restoring Your Data

The good news is that you may be able to remove Chimera ransomware manually, using the step-by-step instructions below. But the bad news is that Chimera ransomware is programmed to delete any backups, restore points and Volume Shadow Copies in Windows systems. This is why we have researched and provided the following tutorials to help you try and decrypt your data:

Tutorial 1:
http://sensorstechforum.com/restore-files-encrypted-via-rsa-encryption-remove-cryptowall-and-other-ransomware-manually/

Tutorial 2:
http://sensorstechforum.com/remove-rsa-2048-encryption-key-from-cryptowall-3-0/

And here are the instructions on how to remove this virus from your computer safely and how to protect your data and back it up against any future intrusions:

1. Start Your PC in Safe Mode to Remove Chimera Ransomware.

For Windows XP, Vista, 7 systems:

1. Remove all CDs and DVDs, and then Restart your PC from the “Start” menu.
2. Select one of the two options provided below:

For PCs with a single operating system: Press “F8” repeatedly after the first boot screen shows up during the restart of your computer. In case the Windows logo appears on the screen, you have to repeat the same task again.

Capture

For PCs with multiple operating systems: Тhe arrow keys will help you select the operating system you prefer to start in Safe Mode. Press “F8” just as described for a single operating system.

safe-mode-windows

3. As the “Advanced Boot Options” screen appears, select the Safe Mode option you want using the arrow keys. As you make your selection, press “Enter“.

4. Log on to your computer using your administrator account

windows-safe-mode-running

While your computer is in Safe Mode, the words “Safe Mode” will appear in all four corners of your screen.

For Windows 8, 8.1 and 10 systems:
Step 1: Open the Start Menu
Windows-10-0 (1)
Step 2: Whilst holding down Shift button, click on Power and then click on Restart.
Step 3: After reboot, the aftermentioned menu will appear. From there you should choose Troubleshoot.
Windows-10-1-257x300
Step 4: You will see the Troubleshoot menu. From this menu you can choose Advanced Options.
Windows-10-2 (1)
Step 5: After the Advanced Options menu appears, click on Startup Settings.
Windows-10-3 (1)
Step 6: Click on Restart.
Windows-10-5 (1)
Step 7: A menu will appear upon reboot. You should choose Safe Mode by pressing its corresponding number and the machine will restart.

2. Remove Chimera Ransomware automatically by downloading an advanced anti-malware program.

To clean your computer you should download an updated anti-malware program on a safe PC and then install it on the affected computer in offline mode. After that you should boot into safe mode and scan your computer to remove all Chimera Ransomware associated objects.

donload_now_250
Spy Hunter scanner will only detect the threat. If you want the threat to be automatically removed, you need to purchase the full version of the anti-malware tool.Find Out More About SpyHunter Anti-Malware Tool / How to Uninstall SpyHunter

Security engineers recommend that you back up your files immediately, preferably on an external memory carrier in order to be able to restore them. In order to protect yourself from Chimera Ransomware (For Windows Users) please follow these simple steps:

For Windows 7 and earlier:

1-Click on Windows Start Menu
backup-1
2-Type Backup And Restore
3-Open it and click on Set Up Backup
w7-backup3
4-A window will appear asking you where to set up backup. You should have a flash drive or an external hard drive. Mark it by clicking on it with your mouse then click on Next.
backup-3
5-On the next window, the system will ask you what do you want to backup. Choose the ‘Let Me Choose’ option and then click on Next.
backup-4
6-Click on ‘Save settings and run backup’ on the next window in order to protect your files from possible attacks by Chimera Ransomware.
backup-5

For Windows 8, 8.1 and 10:

1-Press Windows button + R
filehistory-1
2-In the window type ‘filehistory’ and press Enter
filehistory-2
3-A File History window will appear. Click on ‘Configure file history settings’
filehistory-3
4-The configuration menu for File History will appear. Click on ‘Turn On’. After its on, click on Select Drive in order to select the backup drive. It is recommended to choose an external HDD, SSD or a USB stick whose memory capacity is corresponding to the size of the files you want to backup.
filehistory-4
5-Select the drive then click on ‘Ok’ in order to set up file backup and protect yourself from Chimera Ransomware.
Enabling Windows Defense Feature:
1- Press Windows button + R keys.
sysdm
2- A run windows should appear. In it type ‘sysdm.cpl’ and then click on Run.
windows-defense2
3- A System Properties windows should appear. In it choose System Protection.
windows-defense3
5- Click on Turn on system protection and select the size on the hard disk you want to utilize for system protection.
6- Click on Ok and you should see an indication in Protection settings that the protection from Chimera Ransomware is on.
windows-defense1
Restoring a file via Windows Defense feature:
1-Right-click on the encrypted file, then choose Properties.
file-restore1
2-Click on the Previous Versions tab and then mark the last version of the file.
file-restore2
3-Click on Apply and Ok and the file encrypted by Chimera Ransomware should be restored.

Vencislav Krustev

A network administrator and malware researcher at SensorsTechForum with passion for discovery of new shifts and innovations in cyber security. Strong believer in basic education of every user towards online safety.

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