SDJM Ransomware. How to decrypt .sdjm files?

If you cannot open your photos, documents, or other files and also see the .sdjm extension on them, your PC is surely infected with Sdjm ransomware. It pertains to STOP/Djvu ransomware family

Sdjm ransomware ciphers personal files found on the victim’s computer with the extension “.sdjm” and then generates the ransom note in each folder which contains encrypted files. The instructions are put on the victim’s PC in the “readme.txt” file. Its activity is pretty much comparable to other samples of the same family: Fgnh, Vgui, Fgui.

What is Sdjm Ransomware?

NameSdjm Virus
Ransomware family1DJVU/STOP2 ransomware
Extension.sdjm
Ransomware note_readme.txt
RansomFrom $490 to $980
Contactmanager@mailtemp.ch, helprestoremanager@airmail.cc
SymptomsThe images, videos, and other documents have the “.sdjm” extension and cannot be opened by any programs
Fix Tool Trojan Killer – ransomware infections tool. 14-day free trial.

Sdjm is file-encrypting ransomware that prevents regular access to your text files, Excel tables, videos and photos by ciphering them. It marks the encrypted files with the “.sdjm” extension. Then Sdjm ransomware adds a ransom note (readme.txt) to each folder. In this note, you can see the guidance to pay the ransom ($490-$980 in Bitcoin) to a certain BTC wallet. The AES-256 or RSA-1028 cipher it utilizes to cipher the files is not decryptable with contemporary computers. Even quantum computers that already exist will spend thousands of years to find the decryption key.

How dangerous is the Sdjm ransomware?

When Sdjm ransomware appears in your system, it will run through your disks for images, videos, and important documents. It encrypt] all widespread file formats- .psd, .doc, .docx, .xls, .xlsx, .pdf, .jpeg, .png, et cetera. When these files are located, the ransomware will encrypt them and change their extension to “.sdjm” to ensure that you understand what happened.

After the Sdjm ransomware encrypted the data on your PC, it will drop the last “readme.txt” file on the main screen. Besides the ransom payment instructions, the victims also see the emails to contact the fraudsters – helprestoremanager@airmail.cc and manager@mailtemp.ch.

Here is the ransom note that the Sdjm ransomware shows to its victims:

ATTENTION!

Don't worry, you can return all your files!
All your files like pictures, 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-fhnNOAYC8Z
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:
manager@mailtemp.ch

Reserve e-mail address to contact us:
helprestoremanager@airmail.cc

How did the Sdjm ransomware get on my computer?

The Sdjm ransomware spreads by posting websites to download hacked programs or games. Cybercriminals who spread this ransomware are quite foxy, and try to correspond with the latest things. New games introductions, new popular films – Sdjm developers make whatever to get their money on that. Some of the most common techniques these crooks utilize is one-day sites with torrent downloading links. Nevertheless, using the modern trends is not the single way these crooks use. Options that have already turned into classic, such as email spamming, are also normal for STOP/Djvu ransomware spreading.

Malicious email spam
The example of email spamming that may lead to Sdjm ransomware injection

Avoiding this ransomware does not require a lot of effort. Considering the ordinary rules of PC hygiene will substantially minimize all risks. Remember that opening all documents you get on e-mail is not a great habit. Even worse situation is to allow macros in Microsoft Office files. But it is far better to avoid the malware attack at the moment when you have just opened the e-mail message. Inspecting the sender’s address can point out a lot about what you can expect, as well as when you see the thing like “support@amazon.com”– it is likely a trustworthy e-mail. Meanwhile, stuff that tries to resemble Amazon or FedEx shipment notice, but uses the email address of “amazonspurrot1363@gmail.com”– must make you be on the alarm. Above, you can see the example of such a message.

Illegal sources of various digital things need some extra explanation. Breaking copyright law surely exposes you to the risk of being fined. Nonetheless, using torrent trackers or third-party websites to download “free” programs also exposes you to different malware. No one can oversee anonymous people that start the torrent seeding or publish the hacked program version on the website with pirated program.

Sdjm virus removal instructions.

Download Trojan Killer Portable

Trojan Killer Portable Download

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This guide below shows how to use Trojan Killer Portable3 for Sdjm virus detection and removal:

  • STEP 1. Download and install Trojan Killer.

  • STEP 2. Click on "Finish".

  • STEP 3. Wait until necessary updates are downloaded and installed.

  • STEP 4. Select computer scan type.

  • STEP 5. The software will begin scanning your computer.

  • STEP 6. Click on "Cure PC".

Restore the files encrypted by the Sdjm ransomware

In most cases, it’s impossible to recover the files encrypted by the Sdjm ransomware because the private key needed to unlock the encrypted files is only available through cybercriminals. However, we’ve listed one option you can use to recover your files below.

Warning! Make sure you remove the ransomware from your system first, otherwise, it will repeatedly encrypt your files.

If your files were encrypted with an offline key, there is a chance you can recover them by using Emsisoft Decryptor for the STOP/Djvu decryption tool. Follow the below guide to recover your files using the Emsisoft Decryptor for STOP/Djvu.

  1. You can download Emsisoft Decryptor for STOP Djvu by clicking this link.
  2. When the decryptor has finished downloading, double-click on “decrypt_STOPDjvu.exe” to run this program on your computer.
  3. Click the “Decrypt” button to start the decryption process for Sdjm files. The screen will switch to a status view, informing you about your files’ current process and decryption status.
  4. The decryptor will inform you once the decryption process will be finished. If you require the report for your records, you can save it by clicking the “Save log” button.

If the Emsisoft Decryptor can’t decrypt your .sdjm files and you do not plan on paying the ransom, it is advised that you make an image of the encrypted drives so that you can decrypt them in the future.

Your computer should now be free of the Sdjm ransomware infection. However, suppose your current antivirus allowed this malicious program on your computer. In that case, you might want to consider purchasing the full-featured version of Trojan Killer to protect against these types of threats in the future.

SDJM Ransomware — How To Remove Virus & Decrypt Files?

Name: SDJM Virus

Description: SDJM Virus is a STOP/DJVU family of ransomware-type virus. It encrypts files, video, photos, documents. Encrypted files can be tracked by a specific sdjm extension. SDJM ransomware asks victims for a ransom fee about $490 - $980 in Bitcoin.

Offer price: 480

Currency: $

Operating System: Windows

Application Category: Virus

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  1. My files are encrypted by ransomware, what should I do now?
  2. About DJVU (STOP) Ransomware: https://gridinsoft.com/ransomware/djvu
  3. More about Trojan Killer: https://gridinsoft.com/trojankiller

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About William Reddy

I am from Ireland. My parents bought me a computer when I was 11, and several months after I have got a virus on this PC. I decided to enter the INSA Centre Val de Loire university after being graduated from the school. This French educational institution was offering a brand-new cybersecurity course. After getting the master's degree in cybersecurity, I've started working as a virus analyst in a little anti-malware vendor.