Cccmn Ransomware

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

cccmn ransomware removal instructions

What is cccmn?

cccmn is a ransomware-type virus that belongs to the CrySiS malware family. Following successful infiltration, cccmn encrypts most stored data and appends filenames with the ".cccmn" extension plus the victim's ID and developer's email address. For instance, "sample.jpg" might be renamed to a filename such as "[].cccmn". Once encrypted, data immediately becomes unusable. Note that encryption is not the only cccmn feature - it is also designed to display a pop-up window and place a text file ("FILES ENCRYPTED.txt") on the victim's desktop.

The new text file contains a short message stating that data is encrypted and that victims must contact cyber criminals if they want to restore it. The pop-up, on the other hand, provides much more information. It states that, to decrypt data, users must purchase a decryption tool. Information regarding the type of encryption is not provided and, thus, it is currently unknown whether cccmn uses symmetric or asymmetric cryptography. In any case, decryption requires a unique key generated individually for each victim. The keys are stored on a remote server controlled by cyber criminals and victims are encouraged to pay for a decryption tool with the key embedded within. The cost is not specified and supposedly depends on how quickly the victim contacts cyber criminals. This type of ransom typically fluctuates between $500 and $1500, and cyber criminals typically request payment in a form of cryptocurrency (Bitcoins, Monero, DASH, or similar). The criminals are also willing to decrypt one selected file (up to 1 MB, non-archived) free of charge. They do this to gain the victim's trust and show that decryption is possible. In fact, these people should never be trusted. Research shows that cyber criminals often ignore victims, once payments are submitted. Therefore, paying usually gives no positive result and users are scammed. We strongly recommend that you ignore all requests to submit payments or even contact these people. Unfortunately, there are no tools capable of cracking cccmn encryption and restoring data free of charge. 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:

cccmn decrypt instructions

The internet is full of ransomware-type viruses that share similarities with cccmn. The list of examples includes (but is not limited to) AUDIT, Supportfiless24, Ox4444, and YuALook. Although these viruses are developed by different cyber criminals, their behavior is identical - all encrypt data and make ransom demands. The only major differences are size of ransom and type of encryption algorithm used. Unfortunately, viruses such as cccmn typically employ cryptographies such as RSA and AES (and similar) that generate unique decryption keys. Therefore, manual decryption without involvement of developers (contacting these people is not recommended) is mostly impossible. The only possible scenarios are ransomware being still in development or having certain bugs/flaws. These viruses present a strong case for maintaining regular data backups, however, it is important to store them on a remote server (e.g., Cloud) or an unplugged storage device, otherwise ransomware encrypts backups with regular data.

How did ransomware infect my computer?

It is currently not known exactly how cyber criminals proliferate cccmn, however, in most cases, ransomware-type viruses are proliferated using trojans, spam email campaigns, fake software updaters, and unofficial software download sources. Trojans cause so-called "chain infections" - they simply open "backdoors" for other malware to infiltrate the system. Spam email campaigns proliferate malicious attachments that, once opened, download and install malware. Fake updaters infect computers by exploiting old software bugs/flaws or simply downloading and installing malware rather than the promised updates. Unofficial software download sources (torrents, eMule, freeware download websites, free file hosting sites, etc.) present malicious executables as legitimate software. This often tricks users into downloading and installing malware.

How to protect yourself from ransomware infections?

Lack of knowledge of the threats and careless behavior are the main reasons for computer infections. The key to safety is caution. Therefore, pay attention when browsing the internet, and downloading, installing, and updating software. Think twice before opening email attachments. If the file/link has been received from a suspicious source or seems irrelevant - do not open anything. Download apps from official sources only, using direct download links. Third party downloaders/installers often include rogue software, and thus these tools should not be used. The same rule applies to software updates. It is important to keep installed programs up-to-date, but use implemented functions or tools provided by the official developer only. Having a reputable anti-virus/anti-spyware suite installed and running is also paramount, since these tools can detect and eliminate malware before any damage is done. If your computer is already infected with cccmn, we recommend running a scan with Spyhunter for Windows to automatically eliminate this ransomware.

Screenshot of cccmn text file:

cccmn text file

Screenshot of files encrypted by cccmn (".cccmn" extension):

Files encrypted by cccmn

cccmn ransomware removal:

Instant automatic removal of cccmn 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 cccmn 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 cccmn 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 cccmn 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 cccmn 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 cccmn 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 cccmn, 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 cccmn ransomware.

Note that Windows 10 Fall Creators Update includes a "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 cccmn ransomware: