Digisom Ransomware

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

Digisom ransomware removal instructions

What is Digisom?

Digisom is a ransomware-type virus that stealthily infiltrates systems and encrypts various files. During encryption, Digisom renames encrypted files using the "[original_file_name][3_random_characters.x]" pattern (for example, "sample.jpg" is renamed to "sample.jpgG3e.x"). Some newer variants of this ransomware use this scheme of file renaming after successfully encrypting them - filename.extension[A-Za-z0-9]{3}.x Following successful encryption, this virus changes the desktop wallpaper to a plain black color and creates ten text files ("Digisom Readme0.txt", "Digisom Readme1.txt", up to "Digisom Readme9.txt"), placing them on the desktop. In addition, Digisom opens a pop-up window, which contains a timer until the next file deletion takes place (Digisom deletes a single random file every two hours).

The ten text files contain identical ransom-demand messages stating that files are encrypted and that they can only be restored using a unique private key. Unfortunately, this information is accurate. Digisom uses asymmetric cryptography and, thus, public (encryption) and private (decryption) keys are generated. It is impossible to restore files without the private key, and since it is stored on a remote server, victims are encouraged to pay a ransom to receive it. The cost of this key is .2 Bitcoin (currently, 1 Bitcoin is equivalent to ~$1045). Payment instructions are provided on Digisom's website, however, criminals often ignore victims, once payments are submitted. Therefore, never trust these websites. There is a high probability that paying will not deliver any positive result - you will simply be scammed. Furthermore, paying will support cyber criminals' malicious businesses. Unfortunately, there are no tools capable of restoring files encrypted by Digisom - the problem can only be resolved by restoring files/system from a backup.

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

Digisom decrypt instructions

Digisom is virtually identical to Polski, CryptoShield, RansomPlus, Samsam, and dozens of other ransomware-type viruses. Note that all of these viruses have identical behavior - they encrypt files and make ransom demands. Therefore, the only noticeable differences are size of ransom and cost of decryption. The distribution methods are also identical. Criminals proliferate ransomware by employing trojans, fake software update tools, spam emails (infectious attachments), peer-to-peer networks (torrents, eMule, etc.), and third party software download sources (free file hosting websites, freeware download websites, etc.) Therefore, you should use a legitimate anti-virus/anti-spyware suite and keep your installed applications up-to-date. Bear in mind, however, that cyber criminals often employ fake updaters to exploit software bugs/flaws to infect the system. Therefore, software should never be updated via third party tools. In addition, never open files received from suspicious emails or download software from unofficial sources. Poor knowledge of these threats and rushing steps is often the reason for computer infections.

Ransom-demand message presented within Digisom text files:

Your important files were encrypted on this computer: photos, videos, documents, etc. You can verify this by opening them.
To save your files, you need a private key to decrypt it.
The single copy of private key, which will allow you to unlock the files, is located on a secret server on the internet; the server will destroy the key within 48 hours after encryption completed. After that, nobody are able to restore the files.
To retrieve the private key, you need to pay 0.2 bitcoins. Check out the website on how to make payment: http://www.digisom.pw

Screenshot of Digisom website:

Digisom website

Text presented within Digisom website:

1. Get Bitcoins (BTC) at localbitcoins.com if you don't already have any.
2. Send 0.20004084 Bitcoins (in ONE payment) to the address below.
If you send any other bitcoin amount, payment system will ignore it !
Send EXACTLY 0.20004084 BTC (plus fees) to: 1FCuCww75NtxtVJHsvwaWJsphLsT1tRAoL
Bitcoins have not yet been received.
If you have already sent Bitcoins (the exact Bitcoin sum in one payment as shown in the box below), please wait a few minutes to receive them by Bitcoin Payment System. If you send any other sum, Payment System will ignore the transaction and you will need to send the correct sum again, or contact the site owner for assistance.

Digisom ransomware pop-up window (GIF):

Digisom pop-up

Screenshot of files encrypted by Digisom ransomware ("[original_file_name][3_random_characters.x]" name pattern):

Files encrypted by Digisom

Digisom ransomware removal:

Instant automatic removal of Digisom 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 Digisom 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 Digisom 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 Digisom 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 Digisom 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 Digisom 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 Digisom, 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 Digisom ransomware.

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 Digisom 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 pcrisk.com 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
Digisom 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 Digisom virus on your mobile device.
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Platform: Windows

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