What is Quantum Ransomware

Quantum is the name of a ransomware infection. It was purposefully developed to encrypt system-stored data and blackmail victims into paying money for its return. The virus uses military-grade algorithms to restrict users from accessing their own files. It also appends the .quantum extension to highlight access-blocked data. For instance, a file named 1.pdf will change to 1.pdf.quantum and drop its original icon. After this, Quantum Ransomware creates an HTML file called README_TO_DECRYPT.html. The file is meant to show instruction on returning the data.


Your ID:
This message contains an information how to fix the troubles you've got with your network.
Files on the workstations in your network were encrypted and any your attempt to change, decrypt or rename them could destroy the content.
The only way to get files back is a decryption with Key, provided by the Quantum Locker.
During the period your network was under our control, we downloaded a huge volume of information.
Now it is stored on our servers with high-secure access. This information contains a lot of sensitive, private and personal data.
Publishing of such data will cause serious consequences and even business disruption.
It's not a threat, on the contrary - it's a manual how to get a way out.
Quantum team doesn't aim to damage your company, our goals are only financial.
After a payment you'll get network decryption, full destruction of downloaded data, information about your network vulnerabilities and penetration points.
If you decide not to negotiate, in 48 hours the fact of the attack and all your information will be posted on our site and will be promoted among dozens of cyber forums, news agencies, websites etc.
To contact our support and start the negotiations, please visit our support chat.
It is simple, secure and you can set a password to avoid intervention of unauthorised persons.
Password field should be blank for the first login.
Note that this server is available via Tor browser only.
P.S. How to get TOR browser - see at hxxps://www.torproject.org

Based on information written inside of the file, the only way to decrypt files is to buy special decryption software stored by cybercriminals. Necessary payment details to obtain this software will be exposed after contacting swindlers via a linked TOR website. In addition, it is also claimed large volumes of sensitive data have been uploaded to external servers, which, in case of not paying the ransom within 48 hours, will be exfiltrated on specialized markets. Quantum developers use such a statement to threaten victims of undergoing reputational damage to their business and increase incentives to perform the payment. Unfortunately, it is often unlikely to decrypt data without the help of cybercriminals. Encryption ciphers employed by many ransomware infections are strong and hard to decode using third-party tools. Victims can return their data for free via previously created backups if such are available. The only drawback of this is that collected data can still be exposed and sold on dark web resources. Whatever the case, it is your choice to decide whether to pay the ransom or not. Below we provide all the necessary information on how to remove the virus and recover your data but under rare conditions.

quantum ransomware

How Quantum Ransomware infected your computer

Ransomware infections proliferate systems using a number of vectors – it can be trojans, fake software downloads, e-mail scam messages, backdoors, keyloggers, web-injects, and other types of suspicious channels. E-mail scam is used to spread malicious files or links. Examples of files detected in such an affair were reported to be MS Office documents, PDFs, JavaScript, Archive, or directly Executable attachments. It is worth mentioning that cybercriminals try their best to disguise scam letters as something legitimate. You are likely to see DHL, DPD, FedEx, or other templates of world-popular firms. Beware of them and do not trust everything you see on the web. Keep in mind that downloading software from unofficial resources is always associated with risk. Pirated or cracked programs are popularly used by many users increasing the chance of accidentally catching infections. We encourage you to read our guide and learn more useful tips on protecting yourself against such threats in the future.

  1. Download Quantum Ransomware Removal Tool
  2. Get decryption tool for .quantum files
  3. Recover encrypted files with Stellar Data Recovery Professional
  4. Restore encrypted files with Windows Previous Versions
  5. Restore files with Shadow Explorer
  6. How to protect from threats like Quantum Ransomware

Download Removal Tool

Download Removal Tool

To remove Quantum Ransomware completely, we recommend you to use SpyHunter 5 from EnigmaSoft Limited. It detects and removes all files, folders, and registry keys of Quantum Ransomware. The trial version of SpyHunter 5 offers virus scan and 1-time removal for FREE.

Alternative Removal Tool

Download Norton Antivirus

To remove Quantum Ransomware completely, we recommend you to use Norton Antivirus from Symantec. It detects and removes all files, folders, and registry keys of Quantum Ransomware and prevents future infections by similar viruses.

Quantum Ransomware files:


Quantum Ransomware registry keys:

no information

How to decrypt and restore .quantum files

Use automated decryptors

Download Kaspersky RakhniDecryptor

kaspersky dharma ransomware decryptor

Use following tool from Kaspersky called Rakhni Decryptor, that can decrypt .quantum files. Download it here:

Download RakhniDecryptor

There is no purpose to pay the ransom because there is no guarantee you will receive the key, but you will put your bank credentials at risk.

Dr.Web Rescue Pack

Famous antivirus vendor Dr. Web provides free decryption service for the owners of its products: Dr.Web Security Space or Dr.Web Enterprise Security Suite. Other users can ask for help in the decryption of .quantum files by uploading samples to Dr. Web Ransomware Decryption Service. Analyzing files will be performed free of charge and if files are decryptable, all you need to do is purchase a 2-year license of Dr.Web Security Space worth $120 or less. Otherwise, you don’t have to pay.

If you are infected with Quantum Ransomware and removed from your computer you can try to decrypt your files. Antivirus vendors and individuals create free decryptors for some crypto-lockers. To attempt to decrypt them manually you can do the following:

Use Stellar Data Recovery Professional to restore .quantum files

stellar data recovery professional

  1. Download Stellar Data Recovery Professional.
  2. Click Recover Data button.
  3. Select type of files you want to restore and click Next button.
  4. Choose location where you would like to restore files from and click Scan button.
  5. Preview found files, choose ones you will restore and click Recover.
Download Stellar Data Recovery Professional

Using Windows Previous Versions option:

  1. Right-click on infected file and choose Properties.
  2. Select Previous Versions tab.
  3. Choose particular version of the file and click Copy.
  4. To restore the selected file and replace the existing one, click on the Restore button.
  5. In case there is no items in the list choose alternative method.

Using Shadow Explorer:

  1. Download Shadow Explorer program.
  2. Run it and you will see screen listing of all the drives and the dates that shadow copy was created.
  3. Select the drive and date that you want to restore from.
  4. Right-click on a folder name and select Export.
  5. In case there are no other dates in the list, choose alternative method.

If you are using Dropbox:

  1. Login to the DropBox website and go to the folder that contains encrypted files.
  2. Right-click on the encrypted file and select Previous Versions.
  3. Select the version of the file you wish to restore and click on the Restore button.

How to protect computer from viruses, like Quantum Ransomware, in future

1. Get special anti-ransomware software

Use ZoneAlarm Anti-Ransomware

Famous antivirus brand ZoneAlarm by Check Point released a comprehensive tool, that will help you with active anti-ransomware protection, as an additional shield to your current protection. The tool provides Zero-Day protection against ransomware and allows you to recover files. ZoneAlarm Anti-Ransomware is compatible with all other antiviruses, firewalls, and security software except ZoneAlarm Extreme (already shipped with ZoneAlarm Anti-Ransomware) or Check Point Endpoint products. The killer features of this application are: automatic file recovery, overwrite protection that instantly and automatically recovers any encrypted files, file protection that detects and blocks even unknown encryptors.

Download ZoneAlarm Anti-Ransomware

2. Back up your files

idrive backup

As an additional way to save your files, we recommend online backup. Local storage, such as hard drives, SSDs, flash drives, or remote network storage can be instantly infected by the virus once plugged in or connected to. Quantum Ransomware uses some techniques to exploit this. One of the best services and programs for easy automatic online backup is iDrive. It has the most profitable terms and a simple interface. You can read more about iDrive cloud backup and storage here.

3. Do not open spam e-mails and protect your mailbox

mailwasher pro

Malicious attachments to spam or phishing e-mails are the most popular method of ransomware distribution. Using spam filters and creating anti-spam rules is good practice. One of the world leaders in anti-spam protection is MailWasher Pro. It works with various desktop applications and provides a very high level of anti-spam protection.

Download MailWasher Pro
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