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What is Oopl Ransomware

Oopl Ransomware is a variant of the STOP/Djvu ransomware family, which encrypts files on the victim’s computer and demands a ransom for their decryption. It is distributed through various methods, such as spam emails with infected attachments, fake software cracks, or by exploiting vulnerabilities in the operating system and installed programs. When Oopl ransomware infects a system, it scans for files like photos, videos, and documents, modifies their structure, and adds the .oopl extension to each encrypted file, making them unusable without the decryption key. For example, it transforms files like 1.jpg into 1.jpg.oopl and 2.png into 2.png.oopl. The ransom note created by Oopl ransomware is named _readme.txt. Oopl ransomware uses the Salsa20 encryption algorithm to encrypt files. Although it is not the strongest method, it still provides an overwhelming number of possible decryption keys, making brute-forcing the decryption key extremely difficult.

STOP Ransomware (.oopl extensions)
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Emsisoft Decryptor for STOP Djvu is a file decryption tool created by Emsisoft and Michael Gillespie that can help victims recover their files without paying a ransom to the cybercriminals. The tool was initially developed by creating a side-channel attack on the ransomware’s keystream and has been updated to include decryption keys for various ransomware variants. However, the Emsisoft Decryptor for STOP Djvu may not work for all victims, as it depends on whether the files were encrypted using an offline key or an online key. To use the decryptor, victims need to upload pairs of encrypted and original files via the Emsisoft Decryption page. If the decryption is successful, the tool will provide the necessary information to decrypt the files. It is important to note that the Emsisoft Decryptor for STOP Djvu does not remove the malware from the infected computer. Therefore, it is essential to quarantine and remove the malware before attempting to decrypt the files.

oopl ransomware

How Oopl Ransomware infects computers

Oopl ransomware, like other ransomware variants, may use several common attack vectors to infect computers. Some of these attack vectors include:

  • Phishing emails: Cybercriminals often send phishing emails containing malicious attachments or links that, when opened or clicked, can lead to the installation of ransomware on the victim’s computer.
  • Exploitable software vulnerabilities: Attackers can exploit known vulnerabilities in software, such as unpatched operating systems, applications, or plugins, to gain unauthorized access to a system and deploy ransomware.
  • Remote Desktop Protocol (RDP) and credential abuse: Cybercriminals can exploit weak or stolen credentials to gain access to a victim’s system through RDP, which can then be used to deploy ransomware.
  • Malicious downloads and websites: Ransomware can be distributed through malicious downloads or compromised websites that host the malware. When a user visits such a site or downloads a malicious file, the ransomware can be installed on their system.
  • Social engineering: Attackers can use social engineering techniques, such as impersonating a trusted entity or manipulating users into performing actions that lead to the installation of ransomware.

To protect against these attack vectors, it is essential to maintain up-to-date software, use strong and unique passwords, enable multi-factor authentication, educate users about phishing and social engineering, and employ robust security measures like firewalls, antivirus software, and intrusion detection systems.

  1. Download Oopl Ransomware Removal Tool
  2. Get decryption tool for .oopl 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. Restore media files with Media Repair
  7. How to protect from threats like Oopl Ransomware

Virus modifies “hosts” file to block Windows updates, downloading antivirus programs, and visiting sites related to security news or offering security solutions. Oopl Ransomware comes along with AZORult trojan, which was initially created to steal logins and passwords. The process of infection also looks like installing Windows updates, the malware shows a fake window, that mimics the update process.

fake windows update from Oopl Ransomware

It uses rdpclip.exe to replace a legal Windows file and to launch an attack on a computer network. After encrypting the files, the encrypter is deleted using the delself.bat command file. Oopl Ransomware virus is propagated via spam attack with malicious e-mail attachments and using manual PC hacking. Can be distributed by hacking through an unprotected RDP configuration, fraudulent downloads, exploits, web injections, fake updates, repackaged, and infected installers. The virus assigns a certain ID to the victims, which is used to name those files and supposedly to send a decryption key. Great tools to protect against Oopl Ransomware are: Emsisoft Anti-Malware and Malwarebytes Anti-Malware.

Download Oopl Ransomware Removal Tool

Download Removal Tool

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

Alternative Removal Tool

Download Norton Antivirus

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

How to remove Oopl Ransomware manually

It is not recommended to remove Oopl Ransomware manually, for safer solution use Removal Tools instead.

Oopl Ransomware files:


Oopl Ransomware registry keys:

no information

How to decrypt and restore .oopl files

Use automated decryptors

Download STOP Djvu Decryptor from EmsiSoft (.oopl variations)

IMPORTANT: Read this detailed guide on using STOP Djvu Decryptor to avoid file corruption and time wasting.

STOP djvu ransomware decryptor from emsisoft

STOP Djvu Decryptor is able to decrypt .oopl files, encrypted by Oopl Ransomware. This tool was developed by EmsiSoft. It works in automatic mode, but in most cases works only for files encrypted with offline keys. Download it here:

Download STOP Djvu Decryptor

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 .oopl files by uploading samples to Dr. Web Ransomware Decryption Service. Analysis of 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 Oopl Ransomware and removed it from your computer, you can try decrypting 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 .oopl 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.

Use Media Repair to decrypt media files encrypted with .oopl

media repair tool

  1. Download Media Repair tool.
  2. Right-click on the downloaded archive, and select Extract to Media_Repair\.
  3. Then double-click on the extracted .exe file to launch the utility.
  4. At first, you have to choose which file type you want to decrypt. You can do it from the drop-down menu in the utility.
  5. Next, browser the folder with encrypted or reference files. Choose any of them and click on the Test icon located in the top right corner.
  6. Media Repair will display a pop-up message with information on whether it can repair the selected file or not.
  7. After checking if it is possible or not, select your reference file and click on the icon right under the Test button we used in step #5.
  8. If the file pair is properly matched, you can move on and hit the Play button to start repairing. You can also stop the process anytime by clicking on the Stop button.

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

1. Get special anti-ransomware software

Use G-DATA STOP/Djvu vaccine

stop/djvu ransomware vaccine

G DATA has released a vaccine to block STOP/DJVU ransomware from encrypting victims’ files after infection. The vaccine prevents the ransomware from encrypting files anymore, but it does not prevent the infection itself. The vaccine is available on GitHub. Download it below:

Download STOP/Djvu vaccine

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. Oopl 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.

Download iDrive

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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James Kramer
Hello, I'm James. My website, a culmination of a decade's journey in the realms of computer troubleshooting, software testing, and development. My mission here is to offer you comprehensive, yet user-friendly guides across a spectrum of topics in this niche. Should you encounter any challenges with the software or the methodologies I endorse, please know that I am readily accessible for assistance. For any inquiries or further communication, feel free to reach out through the 'Contacts' page. Your journey towards seamless computing starts here