How to remove Moresa virus and restore encrypted files

Moresa ransomware virus

This article is dedicated to Moresa virus that infects users' PC in diverse countries of the world, and encrypts their data. In this article you will find full information on what is Moresa, and the deletion of Moresa from your workstation. In addition, we'll tell you how to recover the cyphered information, if possible.



Moresa is the dangerous software penetrating machines mainly via e-mail spam and Trojans. Also, web-criminals use zero-day vulnerabilities to take control over the computer, but well-known program companies quickly correct them. After penetration, Moresa reviews the PC memory to find the folders to be encrypted and their approximate worth. Nowadays, any new ransomware knows how to cypher audio, image, text and video files in all known extensions. Extra attention is attracted to businesslike files, because representatives of business are the main objective for criminals. Moresa encrypts only files with information, and does not touch the software, so that the victim can pay the ransom through his PC. The operation is performed through famous RSA and AES algorithms, and its intricacy is so high that it can't be bruteforced. Such complexity gives base for impressive efficiency of this kind of viruses in recent years: common user, even if he has a very high knowledge of the computer, will never be able to restore the data, and will have no choice except paying the ransom. The sole manner to restore files is to find the fraudster's website and get the master key.

The knowledge of computers is very significant in our century, as it helps you to protect the workstation from malicious programs. For encrypting viruses it's most relevant, because, unlike normal viruses, after eliminating ransomware from the system, the fruits of its actions will stay. You easily can decrease the chances of getting ransomware if you'll follow these principles:

    • Monitor the performance of your PC. Data encrypting is a sophisticated act that requires a considerable amount of computer resources. In few seconds of infection, the computer slows down, and the encrypting process appears in Process Manager. You can recognize this moment and switch off the workstation before files will be completely spoiled. Of course, some files will be damaged, but the rest of them will be safe.
    • Be cautious with the e-mails that contain something more than a message. The #1 template of scam letters is the story about prize gaining or parcel receiving. You also should be careful with business correspondence, particularly if you don't know the person who send it and not sure what's inside. lawsuits, summaries, appeals, Bills for services and products and other specific documents cannot be sent accidentally, and the addressee should know the person who sent it. In most of the cases it is a fraud.
    • Do not accept any changes to your computer, originating from weird programs. If the PC is penetrated by ransomware, it will attempt to eliminate all copies of the data, to make the decryption impossible. However deletion of shadow copies requires administrator rights and your acceptance. So, not accepting changes from a weird software at the right moment, you will reserve the chances to decrypt all lost data for free.

Moresa elimination isn't solution of the whole issue - it's just a one turn from many before the complete file recovery. To restore the information you'll need to follow the advices in the following part of this entry. In case of ransomware we don't give the by-hand removal instruction, because its complexity and the possibility of mistakes will be too high for regular user. Some viruses can't be deleted even through antivirus-program, and have other serious mechanisms of protection. The most effective ransomware protection technique is the uninstalling of data in case of data restoration or ransomware removal attempt. This is extremely undesirable, and the following part will assist you to deal with it.

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

If you fulfilled all steps, mentioned in previous part of an article - it's time to decypher the information. We're not able to reverse the encryption, but we'll get them back via OS functionality and the special programs. More often than not, to get back the files, you should ask for help on specialized communities or from celebrated ransomware fighters and antivirus software manufacturers. If you choose the manual file restore - take a look at this article, which describes all the very effective methods.

To restore information, follow the article about files decryption.

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