QLLN Ransomware. How to decrypt .qlln files?

Written by William Reddy

If you can’t open your pics, documents, or files and also see the .qlln extension on them, your system is surely infected with Qlln ransomware. It pertains to STOP/Djvu ransomware group

Qlln ransomware encrypts personal documents found on the victim’s computer with the extension “.qlln” and then generates the ransom note in each folder which contains encrypted files. The instructions are placed on the victim’s desktop in the “readme.txt” file. Its activity is primarily comparable to other examples of the same ransomware family: Fefg, Fdcv, Dfwe.

What is Qlln Ransomware?

NameQlln Virus
Ransomware family1DJVU/STOP2 ransomware
Ransomware note_readme.txt
RansomFrom $490 to $980
Contactmanager@mailtemp.ch, helprestoremanager@airmail.cc
SymptomsThe images, videos, and other documents have the “.qlln” extension and cannot be opened by any programs
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Qlln is file-encrypting ransomware that prevents access to your text files, Excel tables, videos and images by ciphering them. It marks the encrypted files with the “.qlln” extension. Then Qlln ransomware adds a ransom note (readme.txt) to each folder. In this note, you can see the instructions to pay the ransom ($490-$980 in Bitcoin) to a certain BTC wallet. The AES-256 or RSA-1028 cipher it uses to cipher the documents is not decryptable with modern computers. Even quantum computers that currently exist will likely spend thousands of years to find the decryption key.

How dangerous is the Qlln ransomware?

When Qlln ransomware appears in your system, it will check your computer for images, videos, and also important documents. It encrypt] all widespread file formats- .psd, .doc, .docx, .xls, .xlsx, .pdf, .jpeg, .png, et cetera. When these documents are found, the ransomware will encrypt them and change their extension to “.qlln” to ensure that you understand what happened.

After the Qlln ransomware encrypted the data on your computer, it will generate the last “readme.txt” file on the desktop. In addition to the ransom transactioning instructions, the victims also see the email addresses to contact the cybercriminals – helprestoremanager@airmail.cc and manager@mailtemp.ch.

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


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:
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:

How did the Qlln ransomware get on my computer?

The Qlln ransomware spreads by placing websites to get hacked programs or games. They try to keep their eye on all hype topics which can be chosen to spread ransomware. New games releases, new popular films – Qlln creators make whatever to get their victims on that. Some of the most favored strategies these burglars apply is one-day websites with torrent downloading links. Nevertheless, pursuing the contemporary trends is not the only manner these criminals utilize. Methods that have already turned into classic, such as e-mail spamming, are likewise typical for STOP/Djvu ransomware spreading.

Malicious email spam

The example of email spamming that may lead to Qlln ransomware injection

Avoiding this ransomware does not require a lot of initiative. Considering the regular rules of PC hygiene will noticeably minimize all hazards. Keep in mind that launching all files you get on email is not a great option. Even worse situation is to enable macros in Microsoft Office documents. However, it is better to prevent the malware attack at the moment when you have just opened the email message. Checking the sender’s address can point out a lot about what you can anticipate, as well as when you see things like “support@amazon.com”– it is likely a trustworthy email. On the other hand, stuff that tries to resemble Amazon or FedEx shipping alert, but uses the email address of “amazonspurrot1363@gmail.com”– need to make you get on the alarm. Above, you can see the illustration of such a message.

Illegal sources of different digital things require some additional description. Violating copyright law already exposes you to the possibility of being fined. Nonetheless, using torrent trackers or third-party websites to download “free” programs also exposes you to different malware. No one can control unnamed people that start the torrent seeding or release the hacked program version on the site with pirated program.

Qlln 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 Qlln 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 Qlln ransomware

In most cases, it’s impossible to recover the files encrypted by the Qlln 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 Qlln 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 .qlln 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 Qlln 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.

QLLN Ransomware — How To Remove Virus & Decrypt Files?

Name: QLLN Virus

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

Offer price: 480

Currency: $

Operating System: Windows

Application Category: Virus

User Review
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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

About the author

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.

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