STOP DJVU Ransomware encrypts victim’s files with Salsa20, and appends one of dozens of extensions to filenames; for example, “.mzlq”, “.covm”, “.mado”, “.gero”, etc.
The ransom note “_readme.txt” contains the following text:
ATTENTION! Don't worry, 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: https://we.tl/t-WJa63R98Ku 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: firstname.lastname@example.org Reserve e-mail address to contact us: email@example.com Your personal ID: XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
Updated 31 May 2020
The .covm variant offline key was recovered by Emsisoft and added to the Emsisoft Decryptor server.
Updated 01 May 2020
Updated 06 Feb 2020
Updated 20 Jan 2020
Updated 06 Jan 2020
List of the New Stop/Djvu variants for 148 variants that Emsisoft can decrypt.
.shadow, .djvu, .djvur, .djvuu, .udjvu, .uudjvu, .djvuq, .djvus, .djvur, .djvut, .pdff, .tro, .tfude, .tfudet, .tfudeq, .rumba, .adobe, .adobee, .blower, .promos, .promoz, .promorad, .promock, .promok, .promorad2, .kroput, .kroput1, .pulsar1, .kropun1, .charck, .klope, .kropun, .charcl, .doples, .luces, .luceq, .chech, .proden, .drume, .tronas, .trosak, .grovas, .grovat, .roland, .refols, .raldug, .etols, .guvara, .browec, .norvas, .moresa, .vorasto, .hrosas, .kiratos, .todarius, .hofos, .roldat, .dutan, .sarut, .fedasot, .berost, .forasom, .fordan, .codnat, .codnat1, .bufas, .dotmap, .radman, .ferosas, .rectot, .skymap, .mogera, .rezuc, .stone, .redmat, .lanset, .davda, .poret, .pidom, .pidon, .heroset, .boston, .muslat, .gerosan, .vesad, .horon, .neras, .truke, .dalle, .lotep, .nusar, .litar, .besub, .cezor, .lokas, .godes, .budak, .vusad, .herad, .berosuce, .gehad, .gusau, .madek, .darus, .tocue, .lapoi, .todar, .dodoc, .bopador, .novasof, .ntuseg, .ndarod, .access, .format, .nelasod, .mogranos, .cosakos, .nvetud, .lotej, .kovasoh, .prandel, .zatrov, .masok, .brusaf, .londec, .krusop, .mtogas, .nasoh, .nacro, .pedro, .nuksus, .vesrato, .masodas, .cetori, .stare, .carote
Updated 02 Dec 2019
List of the New Stop/Djvu variants that Emsisoft can decrypt. FOR OFFLINE KEY ONLY!
Updated 25 Nov 2019
Emsisoft Decryptor has obtained and uploaded to server OFFLINE KEYS for the following new STOP (Djvu) variant:
Updated 9 Nov 2019
Decryptor v.22.214.171.124 by Emsisoft currently can decrypt NEW Stop/Djvu variant with file extension:
Terms: Files encrypted with OFFLINE KEY.
There are certain limitations regarding what files can be restored. Speaking of all versions of STOP Djvu, the information can be properly decrypted if they were ciphered by means of an offline key that is available with the developers of the Emsisoft Decryptor. As for Old Djvu, the files can be also decrypted by means of encrypted/original file pairs provided to the STOP Djvu Submission portal. Keep in mind that this is not applicable to New Djvu that was elaborated after August 2019.
What is a “file pair”?
This is pair of files that are identical (as in they are the precise same data), except one duplicate, is encrypted and the other is not. STOP Djvu Submission portal can analyze the differences between an encrypted file and an original copy of the same file, allowing it to determine how to decrypt that file. For most victims with an older variant of STOP/Djvu, submitting file pairs will be the only way they will get their files back.
How to restore your files?
- Start downloading the decryption tool through the same website that developed this “How To” guide.
- Make sure to launch the decryption utility as an administrator. You need to agree with the license terms that will come up. For this purpose, click on the “Yes” button:
- As soon as you accept the license terms, the main decryptor user interface comes up:
- Based on the default settings, the decryptor will automatically populate the available locations in order to decrypt the currently available drives (the connected ones), including the network drives. Extra (optional) locations can be selected with the help of the “Add” button.
- Decryptors normally suggest several options considering the specific malware family. The currently possible options are presented in the Options tab and can be activated or deactivated there. You may locate a detailed list of the currently active Options below.
- As soon as yo add all the desired locations for decryption into the list, click on the “Decrypt” button in order to initiate the decryption procedure. Note that the main screen may turn you to a status view, letting you know of the active process and the decryption statistics of your data:
- The decryptor will notify you as soon as the decryption procedure is completed. If you need the report for your personal papers, you can save it by choosing the “Save log” button. Note that it is also possible to copy it directly to your clipboard and to paste it into emails or forum messages if you need to do so.
DJVU Decryptor options
The decryptor at this moment performs the following options:
- Keep encrypted files
Considering the fact that the ransomware does not store any data regarding the unencrypted documents, the decryptor does not guarantee that the decrypted file will be identical to the one that was initially encrypted. Hence, the decryptor, based on the default settings, will for safety reasons not delete any encrypted documents after they have been decrypted. In case you would like the decryptor to delete any ciphered documents once they have been decrypted, it is possible to deactivate this feature. Note that this may be applicable if the space on your hard drive is limited.
Frequently Asked Questions
Why won’t the decryptor run?
The decryptor requires version 4.5.2 or newer of the Microsoft .NET Framework, so this could mean your version of the .NET Framework is out of date. We recommend installing the latest version of the .NET Framework (4.8 at the time of writing this) and then trying the decryptor again.
Why is the decryptor stuck on “Starting”?
When you run the decryptor, it looks for encrypted files. It will say “Starting” until it is able to find some. If the decryptor remains stuck on “Starting” for a long period of time, then this means it is unable to find any encrypted files.
The decryptor can’t decrypt all of my pictures even though I submitted file pairs for them?
JPEG/JPG images have a format oddity that causes file pairs to be specific to each source of pictures, rather than the file format in general. As an example, if you have pictures from two different cameras, and submit a file pair from the group of pictures from one of the cameras, then the decryptor will only be able to decrypt files from the camera that the file pair came from. In order to decrypt all JPEG/JPG images, you will need to submit file pairs from every source you’ve obtained those pictures from.
What does “Remote name could not be resolved” mean?
It’s an indication of a DNS issue. Our first recommendation is to reset your HOSTS file back to default. Microsoft has an article about this at the following link:
I have an online key. What can I do?
The STOP DJVU ransomware encrypts only the first 150KB of files. So MP3 files are rather large, some media players (Winamp for example) may be able to play the files, but – the first 3-5 seconds (the encrypted portion) will be missing.
You can try to find a copy of an original file that was encrypted:
- Files you downloaded from the Internet that were encrypted and you can download again to get the original.
- Pictures that you shared with family and friends that they can just send back to you.
- Photos that you uploaded on social media or cloud services like Carbonite, OneDrive, iDrive, Google Drive, etc)
- Attachments in emails you sent or received and saved.
- Files on an older computer, flash drive, external drive, camera memory card, or iPhone where you transferred data to the infected computer.
If not, you can try to restore files through the system function – Restore Point.
Also, try removing ransomware extension on a few BIG files and opening them. Either the DJVU ransomware read and did not encrypt the file, or it bugged and did not add the filemarker. If your files are very large (2GB+), the latter is most likely.
How to decrypt DJVU Ransomware files? Emsisoft Decryptor
Name: Emsisoft Decryptor
Description: The STOP Djvu ransomware encrypts victim's files with Salsa20, and appends one of dozens of extensions to filenames. For all versions of STOP Djvu, files can be successfully decrypted if they were encrypted by an offline key. Unfortunately, this tool will not work for every victim as it can only recover files encrypted by 148 of the 160 variants. This will enable approximately 70% of victims to recover their data. For people affected by the remaining 12 variants, no solution currently exists and we are unable to offer further assistance at this point in time. For that those who find themselves in this position archive the encrypted data in case a solution becomes available in the future.
Offer price: 0.0
Operating System: Windows
Application Category: System Tools
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