How to remove CALUM ransomware and decrypt .calum files

What is .calum?

Nowadays there is a great amount of threats on the internet and the one of the most malicious ones is CALUM ransomware. This virus belongs to the Phobos file encryption ransomware family, the members of which are: Dewar, cmdrootairmail Money, admincrypt Money, adminstex777 Money, Oo7 and CASH ransomwares. However, these viruses are unique, they have a lot in common. Usually, they spread by the means of the same trick: the code of the virus is injected into a harmless file and it can hardly be differed from the harmless one. These viruses can be easily found everywhere, as hackers share it by the means of free file sharing services, torrents, installators and etc. Moreover, hackers spread such files by the means of fake emails. They write letters, as if they are representatives of a company or apply for a job and attach the file to this email. Once the user opens it, the code of the virus immediately executes and sneaks into the operating system. If your device has been accidentally infected with this virus, don’t try to decrypt .calum files by your own. It can potentially damage them and it will be imposible to restore them.

CALUM ransomware encryption process.

Once the virus gets into the system it immediately begins to encrypt files. The encryption process can be subdivided into two steps, that occurs one by one. At first, the virus looks for the files that can be encrypted in the all folders on the hard drive. it can encrypt only definite file formats, such as media files and documents, as it’s very difficult to encrypt all files on the computer. Then it begins to modify file structures and makes the unreadable. The result of it the new extension .id[*random*].[].Calum. The renaming of file doesn’t help and it requires to use file decryptor in order to restore them. That’s why the virus creates the ransom note, that’s called info.txt. We recommend you to avoid any contact with them, as it can be very dangerous. Hackers can easily send malicious malware instead of the decryption tool or just ignore you. Usually hackers stop all contacts with the victims once they receive the payment. if you really need to remove CALUM ransomware and decrypt .calum files, you’d betterfollow our free guide!


!!!All of your files are encrypted!!!
To decrypt them send e-mail to this address:
If there is no response from our mail, you can install the Jabber client and write to us in support of

Article’s Guide

  1. How to remove CALUM Ransomware from your computer
  2. How to remove CALUM Ransomware encryption from your files
  3. Data Recovery
  4. Automated decryption tools
  5. Windows Previous Versions

How to remove CALUM Ransomware from your computer?

We strongly recommend you to use a powerful anti-malware program that has this threat in its database. It will mitigate the risks of the wrong installation, and will remove CALUM from your computer with all of its leftovers and register files.

Solution for Windows users: our choice is Norton 360 . Norton 360 scans your computer and detects various threats like CALUM, then removes it with all of the related malicious files, folders and registry keys.

Download Norton windows compatible

If you are Mac user, we advise you to use Combo Cleaner.

How to decrypt .calum files?

Once you’ve removed the virus, you are probably thinking how to decrypt .calum files. Let’s take a look at possible ways of decrypting your data.

Restore .ciphered files with Data Recovery

Data Recovery

  1. Download and install Data Recovery
  2. Select drives and folders with your files, then click Scan.
  3. Choose all the files in a folder, then press on Restore button.
  4. Manage export location.

Download Stellar Data Recovery

The download is an evaluation version for recovering files. To unlock all features and tools, purchase is required ($49.99-299). By clicking the button you agree to EULA and Privacy Policy. Downloading will start automatically.

Decrypt .calum files by other software

Unfortunately, due to the novelty of CALUM ransomware, there are no decryptors that can surely decrypt encrypted files. Still, there is no need to invest in the malicious scheme by paying a ransom. You are able to recover files manually.
You can try to use one of these methods in order to restore your encrypted data manually.

Decrypt .calum files with Emsisoft decryptor

This software includes information about more than 100 viruses of STOP(DJVU) family and other viruses. All that you need are two files or some luck. You can freely use it as it distributes free of charge. If it doesn’t work for you, you can use another method.

Restore .calum files with Windows Previous Versions

This feature is working on Windows Vista (not Home version), Windows 7 and later versions. Windows keeps copies of files and folders which you can use to restore data on your computer. In order to restore data from Windows Backup, take the following steps:

  1. Open My Computer and search for the folders you want to restore;
  2. Right-click on the folder and choose Restore previous versions option;
  3. The option will show you the list of all the previous copies of the folder;
  4. Select restore date and the option you need: Open, Copy and Restore.

Restore .calum files with System Restore

You can always try to use System Restore in order to roll back your system to its condition before infection infiltration. All the Windows versions include this option.

  1. Type restore in the Search tool;
  2. Click on the result;
  3. Choose restore point before the infection infiltration;
  4. Follow the on-screen instructions.

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