Dotmap Ransomware

Also Known As: Dotmap virus
Distribution: Moderate
Damage level: Severe

Dotmap ransomware removal instructions

What is Dotmap?

Dotmap is a malicious software categorized as ransomware. It encrypts data and forces its victims to pay a ransom (purchase a decryption tool/key). Dotmap belongs to Djvu ransomware family, it was discovered by Michael Gillespie. This ransomware changes names of encrypted files by adding ".dotmap" extension. For example, it renames a file named "1.jpg" to "1.jpg.dotmap" and so on. Instructions on how to decrypt data (ransom note) can be found in "_readme.txt" file, it should be placed in folders that contain encrypted files.

Victims are informed that they can return their files, however, to be able to do it they must to purchase a decryption tool and key. It is stated that all files get encrypted with a strongest encryption, which means it is impossible to decrypt them without using the right tool/key. In this particular case the price of decryption is $980. However, Dotmap's developers offer a 50% discount for victims who will contact them in the first 72 hours after encryption. They make it clear that if people want to decrypt files (get access to them) they will have to make a payment no matter what. To prove that they have the right tool these cyber criminals offer a free decryption of one file. Victims can send it to or email address. Another way to contact Dotmap's developers is via Telegram by looking for the @datarestore account. Once contacted, they will send instructions on how to make a payment. Typically, they prefer to be paid in cryptocurrency. However, we do not recommend to trust and pay any ransomware developers. Most people do not receive decryption tools/keys as they were promised. Unfortunately, cyber criminals/ransomware developers usually are the only ones who can provide their victims with those tools. They use cryptography algorithms (symmetric or asymmetric) that cause strong encryptions, most of them are impossible to decrypt without the help of particular ransomware's developers. Usually the only way to restore files for free is to use data backup that was/if was created before having a computer infected with such malicious software. However, if during the encryption there was no Internet connection or/and developer's server was not responding, then it might be possible decrypt files with an offline decryption tool. More information about it can be found by clicking this link.

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

Dotmap decrypt instructions

Dotmap is similar to other programs of this type such as DDOS, PLUT, SYSTEM FAILURE and many others. What most of them have in common is that they are designed to encrypt data and to force victims to pay a ransom. Main differences usually are price of the decryption and encryption algorithm that was used to lock victim's data. However, the biggest problem is that decryption without using the right tools/keys are impossible. It could be possible only if ransomware-type program is not finished, in other words, has some bugs, flaws and so on. For this reason we recommend to always have a data backup created and to store it on some remote sever (like Cloud) or unplugged storage device.

How did ransomware infect my computer?

It is unknown how Dotmap's developers spread this ransomware. However, it is very likely that they use one or another popular method. One way to spread malicious programs is through spam campaigns. They attempt to achieve it by sending emails that contain malicious attachments. They use Microsoft Office documents, PDF docs, executable files like .exe, archives (ZIP, RAD and other files), JavaScript files and so on. Cyber criminals succeed when people open those files. Once opened, they the download and install ransomware or other malicious software. Another way to achieve it is by infecting computers with trojans. Trojans are designed to spread viruses. In other words, if installed they cause chain infections. Furthermore, fake software updaters can cause unwanted downloads and installations too. If used, they often infect computers instead of updating installed software or exploit bugs, flaws of outdated programs/operating systems. Untrustworthy software download sources such as freeware download websites, free file hosting websites, Peer-to-Peer networks (like torrents, eMule etc), various third party downloaders can be used to disguise malicious files as legitimate. Simply said, files downloaded using such sources, if opened, might lead to computer infections. One more way to proliferate malware is through software 'cracking' tools. These programs supposed to perform free activations of paid software. However, it is very common for cyber criminals to use these tools to spread computer infections. Simply said, people who use them put their computers at risk.

Threat Summary:
Name Dotmap virus
Threat Type Ransomware, Crypto Virus, Files locker
Encrypted Files Extension .dotmap
Ransom Demanding Message _readme.txt text file
Ransom Amount $980/$490
Cyber Criminal Contact,, @datarestore (telegram)
Symptoms Can't open files stored on your computer, previously functional files now have a different extension, for example my.docx.locked. A ransom demanding message is displayed on your desktop. Cyber criminals are asking to pay a ransom (usually in bitcoins) to unlock your files.
Additional Information This malware is designed to show fake Windows Update window, modify Windows "hosts" file (to prevent users from accessing cyber security websites) and inject AZORult trojan into the system.
Distribution methods Infected email attachments (macros), torrent websites, malicious ads.
Damage All files are encrypted and cannot be opened without paying a ransom. Additional password stealing trojans and malware infections can be installed together with a ransomware infection.

To eliminate Dotmap virus our malware researchers recommend scanning your computer with Spyhunter.
▼ Download Spyhunter
Free scanner checks if your computer is infected. To remove malware, you have to purchase the full version of Spyhunter.

How to protect yourself from ransomware infections?

We do not recommend to open various web links or files attached to irrelevant emails that are received from unknown or/and suspicious addresses. Safest option is to ignore these emails and leave their contents unopened. Furthermore, download software from official, trustworthy sources (websites) and using direct download links. All those software download channels that we mentioned in the paragraph above should not be trusted or/and used. All installed software should not be updated using unofficial tools. Proper way to update it is using tools or implemented functions that are provided by official developers only. Programs that are not free should not be activated using 'cracking' tools. Usage of such tools is a cyber crime and often causes downloads/installations of malware. One more way to keep computers safe is to have a reputable anti-spyware or anti-virus software installed and active (enabled). If your computer is already infected with Dotmap, we recommend running a scan with Spyhunter for Windows to automatically eliminate this ransomware.

Text presented in Dotmap ransomware's text file ("_readme.txt"):

Don't worry my friend, you can return all your files!
All your files like photos, databases, documents and other important are encrypted with strongest encryption and unique key.
The only method of recovering files is to purchase decrypt tool and unique key for you.
This software will decrypt all your encrypted files.
What guarantees you have?
You can send one of your encrypted file from your PC and we decrypt it for free.
But we can decrypt only 1 file for free. File must not contain valuable information.
You can get and look video overview decrypt tool:
Price of private key and decrypt software is $980.
Discount 50% available if you contact us first 72 hours, that's price for you is $490.
Please note that you'll never restore your data without payment.
Check your e-mail "Spam" or "Junk" folder if you don't get answer more than 6 hours.

To get this software you need write on our e-mail:
Reserve e-mail address to contact us:
Our Telegram account:
Your personal ID:

Screenshot of files encrypted by Dotmap (".dotmap" extension):

Files encrypted by Dotmap

Malware researcher Michael Gillespie has developed a decryption tool that might restore your data if it was encrypted using an "offline key". As we've already mentioned, each victim gets a unique decryption key and all of them are stored in remote servers controlled by cyber criminals. These are categorized as "online keys". However, there are cases when the infected machine has no Internet connection or the server is timing out/not responding. If that is the case, Dotmap will use an "offline encryption key", which is hard-coded. Now it is worth mentioning that cyber criminals change offline keys every now and again. This is being done to prevent multiple encryptions with the same key. Meanwhile, Michael Gillespie continually gathers offline keys and updates the decrypter. However, the chances of successful decryption are still very low, since only a very small portion of "offline keys" has been gathered. You can download the decrypter by clicking this link (note that the download link remains the same, despite the fact that decrypter is being continually updated). Your files will be restored only if the list of gathered keys will include the one that was used to encrypt your data.

Screenshot of STOP/Djvu decrypter by Michael Gillespie:

STOP/Djvu ransomware decrypter by Michael Gillespie

As with most of ransomware from Djvu family, Dotmap also displays a fake Windows update pop-up during the encryption:

Djvu ransomware family fake update

IMPORTANT NOTE! - Aside from encrypting data, ransomware-type infections from Djvu malware family also installs a trojan-type virus called AZORult, which is designed to steal various account credentials. Moreover, this malware family is designed to add a number of entries to the Windows hosts file. The entries contain URLs of various websites, most of which are related to malware removal. This is carried out with the intention of making users unable to access malware security websites and seek help. Our website ( is also on the list. Removing these entries, however, is simple - you can find detailed instructions in this article (note that, although the steps are shown in the Windows 10 environment, the process is virtually identical on all versions of the Microsoft Windows operating system).

Screenshot of websites added to Windows hosts file:

Tro Ransomware adding websites to Windows Hosts file

Dotmap ransomware removal:

Instant automatic removal of Dotmap 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 Dotmap 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 Dotmap 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 Dotmap 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 Dotmap 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 Dotmap 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 Dotmap, 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 Dotmap 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. Here's 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 Dotmap ransomware: