.1C Ransomware

Also Known As: .1C virus
Distribution: Moderate
Damage level: Severe

.1C ransomware removal instructions

What is .1C?

.1C is a high-risk ransomware-type virus which belongs to the Rotor ransomware-type viruses family. The first person to discover it was Michael Gillespie. .1C virus is designed to encrypt user's files, however, there is no information about the used encryption algorithm (symmetric or asymmetric).

Following the encryption, .1C ransomware-type virus modifies the encrypted files, it changes their extension to "!@#$%^&-()_+.1C". For example, if there was a file named "1.jpg", then after encryption it will be changed to "1.jpg!@#$%^&-()_+.1C". Moreover, it creates a "INFO.txt" file that contains two emails (inkognitoman@tutamail.com and inkognitoman@firemail.cc) and a short message in Russian stating that you can contact cyber criminals using one of the provided emails. There is no information about the amount of required ransom nor how soon cyber criminals must be contacted. However, what is common between all the cyber criminals is that typically a key required for decryption is generated individually for each victim and is stored on some remote sever that is controlled by cyber criminals. As a rule, cyber criminals should not be trusted or contacted - quite often they ignore their victims even when they satisfy the conditions/pay the ransom. However, there are no tools that might be able to decrypt the encrypted files for free at the moment. Usually the only way to do so is to restore affected files from an existing backup, if there is one.

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


The Internet is full of ransomware-type viruses, some of the other examples of viruses of this kind are StorageCrypt, Gamma and Koolova. These are just a few examples, however, most ransomware-type viruses are designed to serve the same purpose - to encrypt user's files and to demand ransom payments. Usually these viruses are different only in terms of required ransom cost or form and the encryption algorithm used (usually its either RSA or AES). Besides, usually it is impossible to decrypt the files without contacting cyber criminals who developed the virus, even if it is not recommended to do so. It might be possible to decrypt the files only if the virus is still in development state or has some bugs. Note, always maintain regular data backups and store them in some remote server (like Cloud) or unplugged storage device. If not, then there will be always a possibility that cyber criminals will encrypt your backups within the regular data.

How did ransomware infect my computer?

It is possible that system got infected by .1C virus in one of these ways: through email spam campaigns, fake software updating tools, trojan, unofficial download sources and P2P (Peer-to-Peer) networks. Cyber criminals employ email spam campaigns by attaching some untrustworthy/malicious files to emails that, once opened, infect systems with ransomware-type virus or some other infection. Fake software updating tools usually can infect system in two ways: by exploiting outdated software bugs or other problems or/and downloading malware instead of the promised updates. Trojans that are present (if present) are capable of causing chain infections - to proliferate other viruses (like ransomware-type viruses too). Unofficial software download sources such as websites offering to download freeware, free file hosting websites and so on, and Peer-to-Peer networks like torrents, eMule and others often present various untrustworthy executables as legitimate applications.

How to protect yourself from ransomware infections?

Always remember to browse the web and download/install or update software with care. Do not open irrelevant attachments in emails that are sent from unknown or suspicious senders. Also, keep your software updated, however, use only implemented, official tools that are provided by software developers for that, not some third party tools. Download software using only official ant trustworthy websites, and direct links. Avoid using any third party downloaders, torrents, peer-to-peer (P2P) networks etc. These often download not only the desired software, but various potentially unwanted applications that might be malicious. Have a reputable antivirus software installed on your computer and keep it enabled at all times. If your computer is already infected with .1C, we recommend running a scan with Spyhunter for Windows to automatically eliminate this ransomware.

Text presented in .1C ransomware's text file :

Для связи с нами используйте почту

Screenshot of files encrypted by .1C ("!@#$%^&-()_+.1C" extension):


.1C ransomware removal:

Instant automatic removal of .1C 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 .1C 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, 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 .1C 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 .1C 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 .1C 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 .1C 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 .1C, 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 .1C ransomware.

Note that Windows 10 Fall Creators Update includes "Controlled Folder Access" feature that blocks ransomware attempts to encrypt your files. By default this feature automatically protects files stored in 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. Hereís more information on how to get this update and add 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 .1C ransomware: