How to remove Arena virus and restore encrypted files

Arena ransomware virus

That entry is dedicated to ransomware called Arena which infects customers' systems around the world, and cyphers their files. Here you can see full info on what is Arena, and how to eliminate Arena from the computer. In addition, we'll explain how to get back the cyphered files, if possible.

Arena ransomware already infected many computers in many countries through most effective method: fraud e-mails with dangerous attachments. Sometimes fraudsters use exploits to infect the system, but they are promptly fixed. When infection is done, Arena scans the hard disc, determines the amount of files for encryption and their rough price. Currently, each new ransomware knows how to cypher audio, text, image and video information in all popular extensions. Extra attention is paid to businesslike information, since representatives of business are the key target for hackers. Ransomware encrypts only files with information, and does not spoil the software, so that the user can use the machine to make the payment. The operation is performed through well-known RSA and AES algorithms, and it is so complicated that that decryption of data without a key is impossible. Such complexity creates reason for impressive effectuality of ransomware in recent years: common customer, even having a very good knowledge of the computer, will never get back the data, and will have to pay ransom. The only manner to get back files is to crack the scammer's website and obtain the master key. Some experienced hackers can retrieve encryption keys via flaws in viruse's program code.

There is one common feature for all types of ransomware: it's much simpler to dodge it than to remove its fruits. For encrypting software this is most relevant, because, unlike most viruses, when you remove ransomware from the system, the consequences of its actions will stay. To defend yourself, you need to understand a few basic regulations:

    • Closely examine your e-mails, especially those messages which have files attached to them. The #1 template of fraud messages is the notification about prize winning or package earning. The other popular type of these messages is a forgery for biz correspondence. appeals, lawsuits, summaries, Bills for services or goods and similar sensitive documents do not come accidentally, and the addressee should know the person who sent it. In most of the cases it is a scam.
    • Do not ignore the signs that your PC displays. It consumes much of computing resources to encode the files. If you see an abnormal drop in workstation power or detect a strange process in the Process Manager, you need to switch off the machine, launch it in safe mode, and run the AV-tool. This, if the computer is really infected, will guard some of your files.
    • Do not accept any changes to your computer, coming from weird programs. If the computer is infected by virus, it will attempt to delete all copies of your data, to make the decryption less possible. However deleting of copies needs admin rights and user's acceptance. So, not confirming alterations from a suspicious program at the proper moment, you will keep the opportunity to decrypt all encrypted files for free.

We draw your attention to the fact that removing Arena is just a first and mandatory move for the normal work of the workstation. To restore the files you'll need to familiarize with the tips in the special paragraph of this article. In case of encrypting virus we do not provide the by-hand uninstall guide, since its complication and the possibility of failing is too high for regular customer. We do not advise anyone to remove ransomware manually, since it has different security mechanics that will counteract you. The most effective ransomware protection technique is the removal of information in event of data decryption or malware deletion attempt. To neutralize this, follow the guide below.

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 erasing the ransomware from the computer, it only remains to recover the polluted data. We're not able to reverse the encryption, but we'll get them back through Windows features and the special programs. There are the certain exceptions, but generally file restoration requires lots of time and money. If you're very interested in the by-hand data recovery - take a look at this item, which describes all the safest ways.

To restore information, follow the article about files decryption.

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