How to remove Opqz virus and restore encrypted files

The item is dedicated to Opqz ransomware which penetrates machines in diverse countries of the world, and encrypts their data. In this item we've gathered important information about Opqz's essence, and how to remove Opqz from the system. Furthermore, we'll teach you how to recover the encrypted files, if possible.

Opqz ransomware virus

Opqz ransomware had infected thousands of laptops in different parts of the world via basic manner: false e-mails with viral attachments. Occasionally hackers use zero-day vulnerabilities to get into the PC, but they are quickly fixed. After penetration, the virus checks the hard drive to find the files for encryption and their approximate value. At the moment, each modern ransomware can encrypt video, image, text and audio files in all most used extensions. Extra attention is paid to business files, since businessmen are the main target for hackers. Virus corrupts only files with information, and does not touch the software, so that the user can pay the ransom through an infected computer. The process is executed through world-known encryption algorithms, and its complexity is so above the average level that it can't be bruteforced. This is the basis for unbelievable efficiency of ransomware in last years: an ordinary customer, even having a very high knowledge of the PC, won't ever be able to recover the files, and will have to pay the price. The only way to recover the data is to crack the fraudster's website and obtain the encryption keys. Some skilled hackers can withdraw encryption keys due to flaws in the code of the virus itself. The corrupted files get.YYY extension, and requires ZZZ for data recovery.

There is one thing in common between all types of unwanted software: it is way easier to prevent it than to remove its consequences. It's sad to say, but most people see the importance of PC literacy just when ransomware takes over their workstations. To guard yourself, you have to understand a few basic regulations:

    • Be careful with the messages that contain files. The most popular model of fraud e-mails is the story about prize winning or package earning. The other popular sort of such messages is a "business messages". lawsuits, appeals, summaries, Bills for products and services and suchlike specific information do not be sent without warning, and you, as a minimum, should know the sender. Otherwise, it is a fraud.
    • Do not accept any changes to the computer, coming from unknown software. If the PC is infected by malware, it will endeavour to remove the shadow copies of the files, to decrease the possibility of restoration. However removal of shadow copies needs admin rights and user's acceptance. If you'll think for a moment before accepting the checkbox, it may save your information and your efforts.
    • Don't disregard the signs that your workstation shows. It takes a lot of computing power to encode the data. In the first seconds after the infection, the CPU speed decreases, and the encrypting process emerges in Process Manager. You might anticipate this event and shut down the PC before information will be totally encoded. Of course, the certain amount of files will be damaged, but you will save the other part.

Malware removal is not solution of the whole problem - it's just a one move from many before the total data recovery. If you delete Opqz, you won't restore the data immediately, it will demand additional measures written down in the next section. To eliminate the malware, you have to boot the workstation at safe mode and check it via antivirus. Some viruses can't be uninstalled even with help of AV-software, and have other effective mechanisms of protection. Modern ransomware are able to totally remove cyphered information, or part of it, if somebody attempts to eliminate the virus. To avoid this, abide to the guide under this paragraph.

Removal instruction

Step 1. Boot into Safe mode

Safe mode

Start -> Msconfig.exe

Safe mode. Step 1

On the tab Boot select Safe boot

Safe mode. Step 2

Step 2. Check Startup folder

Start -> Msconfig.exe ->Disable unknown programs in the Startup tab

Startup

Step 3. Check hosts file

Modify hosts file, that located in C:\Windows\System32\drivers\etc\ .

Hosts file.Step 1

Open the file with Notepad and delete suspicious strings.

Hosts file.Step 2

It has to look like this:

Hosts file.Step 3

Step 4. Scan the system with antiviral scanner

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Step 5. Disable Safe mode

Start -> Msconfig.exe ->Disable Safe boot in the Boot tab

Deactivate Safe mode

If you fulfilled all actions, mentioned in previous paragraph - it's time to restore the files. It's impossible to decrypt the files, but we'll recover them using Windows functionality and the particular programs. Ordinarily, to restore the files, the user has to seek help on targeted communities or from famous malware fighters and antivirus software vendors. If you picked the independent information restore - read our entry, which describes all the easiest ways.

To restore information, follow the article about files decryption.

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