How to remove Oonn virus and restore encrypted files

Oonn ransomware virus

Oonn is the dangerous software penetrating PC's mainly through Trojans and scam e-mails. Occasionally hackers use zero-day vulnerabilities to get into the computer, but big program companies promptly correct them. When infection is done, the virus scans the PC memory to find the files for encryption and their approximate price. Currently, each modern virus is able to encrypt video, image, audio and text info in all most used formats. Virus corrupts all files, but the ones that could be business records go first. Virus encrypts only files with information, and doesn't spoil the programs, so that the victim can use the PC to pay the ransom. Encryption is carried out with the help of famous encryption algorithms, and it is so complicated that that it cannot be bruteforced. Such complexity creates reason for impressive success of this sort of viruses in last years: an ordinary PC operator, even having a fairly good knowledge of the computer, will never be able to recover the data, and will have to pay the price. The single manner to recover the data is to hack the scammer's webpage and obtain the encryption keys. Some experienced malware researchers can retrieve encryption keys due to faults in viruse's program code.

That page is about Oonn virus that penetrates customers' laptops around the world, and encrypts the files. Here you will see full information on Oonn's essence, and how to remove Oonn from your computer. In addition, we'll explain how to get back the encrypted data, if possible.

The computer knowledge is very substantial in our century, as it assists user to guard the PC from hazardous programs. Statistically, 90% of users comprehend the importance of PC knowledge only after ransomware infection. It's very easy to reduce the chances to get encrypting virus if you'll follow these principles:

    • Don't admit any changes to your computer, originating from weird software. One of the most efficient manners of file recovery is the restoration via Shadow Copies, so Web-criminals have added the deletion of those copies in the primary features of malware. Anyway, deletion of copies requires admin rights and operator's acceptance. If you'll think for few seconds before confirming the pop-up, it may save your data and your time.
    • Monitor the performance of your laptop. It requires much of CPU resources to encrypt the files. When the Oonn starts to operate, the CPU speed decreases, and the encrypting process appears in Process Manager. You can recognize this moment and shut down the machine before data will be fully encoded. Surely, some information will be lost, but the other part of them will be safe.
    • Closely inspect your mailbox, specifically those messages which have attached files. The #1 template of scam e-mails is the notification about prize winning or package receiving. The other popular kind of these letters is a "business messages". summaries, Invoices for services or products, claims, lawsuits and other important information don't come without warning, and the addressee should know the person who sent it. Otherwise, it is a scam.

Ransomware removal isn't the happy end - it's just a one step in the long road before the complete file restoration. If you delete Oonn, you won't restore the information instantly, it will take more measures written down in the following section. To deelete any ransomware, user has to start the PC at safe mode and check it through AV-tool. We do not suggest you to delete Oonn manually, since it has many protection features which can interfere you. The most efficient viral defensive manner is the uninstalling of information in case of data restoration or virus removal attempt. To neutralize this, abide to the instructions 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


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

After uninstalling the virus from the system, you should get back the corrupted information. In fact, this is not about decryption, since the encryption methods used by web-criminals are too complicated. There are the some exceptions, but most of the time data restoration needs a lot of time and efforts. If you choose the independent data restore - take a look at this article, which shows all the safest manners.

To restore information, follow the article about files decryption.

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