Nesa Virus Removal Guide (+Decrypt .nesa files)

Nesa Virus – Details

Nesa is a destructive software application working as common ransomware. Michael Gillespie, the widely known malware researcher, first found this new name in the DJVU ransomware family.

Nesa was created for the sole function to encrypt all popular file types. Rationally, as soon as the encryption is successfully achieved, the users are unable to get access to them. Nesa ransomware includes its own “.nesa” to all the encrypted files. For instance, the file “price_list.xls”, as soon as modified by Nesa, will be entitled as “price_list.xls.nesa”. When the encryption is accomplished, Nesa puts its own special text file (_readme.txt) into all the folders that store the encrypted files.

The message mentioned by _readme.txt requesting the random os really similar to the alerts provided by other ransomware dangers belonging to the DJVU family. The caution basically indicates that the files have been secured and the only service to get access to it is to use a distinct standalone key. Regretfully, this declaration is definitely true.

The technique to encrypt the files used by Nesa is not completely researched. Nevertheless, there is no doubt that each computer system owner might be provided an unique decryption key, which is absolutely distinct. It is exceptionally tough to recuperate the data without the proper type in location.

“Don’t worry, you can return all your files!”, from _readme.txt message:

message from Nesa virus

One more peculiarity of the Nesa ransomware is that the users are not able to get access to the key. The decrypting key is hosted on a special server under the complete control by the crooks who have launched the Nesa ransomware into the world wide web. In order to get the key and restore the essential information, the users are told to get in touch with the scams by means of email or by telegram and to pay the ransom in the amount of $980.

The message also states that individuals should get in touch with the Nesa authors within 72 hours upon the minute of the data file encryption. The alert shows that by doing so individuals will acquire a 50% discount rate, for that reason, the ransom amount falls to $490.

No matter what the amount of the ransom is, we highly advise that you do not pay the ransom. There is no warranty that these online criminals will keep their promises, so they might not care at all what the victims feel about the file encryption, even when the amount of the ransom is received into their accounts. For this reason, paying ransom typically does not result in an effective recovery. So, the users might simply lose their money for nothing.

Likewise, we advise you not to contact the frauds as they instruct. Do not move money into their wallets. There are no applications that could crack the Nesa ransomware or bring back the information at no charge. Therefore, the only appropriate decision is to bring back the information from possible backups (if offered).

Virus Summary

NameNesa Ransomware
File Extensionnesa
Short DescriptionThe ransomware encrypts all the data stored on your system and requires a ransom to be paid on your part supposedly to recover your important files.
SymptomsFile encryption by the ransomware is performed by means of the AES-556 algorithm (CFB mode) encryption algorithm. Once the encryption is completed, the ransomware adds its special .nesa extension to all the files modified by it.
Distribution MethodAdware bundles and software cracks
Similar InfectionsKarl, Domm, Domn
Removal Tool   GridinSoft Anti-Malware

Do not forget that the Internet is now loaded with infections similar to the Nesa virus. For example, this specific risk is basically similar to Brusaf and other ransomware-type infections. These destructive energies have actually been developed in order to secure the important information and reveal the demand for the users to pay the ransom. All these infections utilize the identical algorithm to produce the specific key for effective data decryption.

Unless the Nesa ransomware is still under the development procedure or has actually got some concealed bugs, it is not possible to bring back the information manually. Thus, the only working service to prevent the loss of your important information is to regularly keep up-to-date backups of all your crucial files.

Another important piece of advice is to keep the backups on unique storage not connected to your primary device. For instance, you might store it on the USB Flash Drive, or some external hard disk drive, or by using the cloud data storage services. Keeping the backups on your routine drive is extremely dangerous, because the backup might likewise be secured by the Nesa .

Leakages for the Nesa ransomware attack.

Nesa utilizes many courses to penetrate the vulnerable computers. It is not certain what particular approach was utilized in your case, however, the intrusion might take place by means of the following channels:

  • bundling with third-party programs, generally freeware;
  • spam e-mails from the unidentified senders;
  • websites supplying free hosting;
  • P2P (peer-to-peer) torrent software.

There are times when the Nesa ransomware may camouflage itself as some real application, for instance, through the misleading alerts demanding setup of some software application upgrade. This is the most typical trick utilized by the frauds to inject the Nesa virus files into the system. This way users partly take part in its installation, without clearly comprehending the risk.

Moreover, the frauds may send out unsolicited spam email with challenging informs encouraging individuals to open suspicious attachments or click some download links, for example, those encouraging the people to open particular images, text files, tax documents and other information.

No doubt, opening these files or clicking on the harmful links might essentially damage the system. Fake Adobe Flash Player update alerts may result in the Nesa ransomware infiltration. Similarly, downloading the cracked software application may furthermore consist of the ransomware installer. The last but not the least, setup of Nesa may take place through some Trojan horses that may be set up stealthily into the system and without the user’s direct consent or even consent.

Avoiding the Nesa attack.

Naturally, there is no absolute warranty that your computer will be always free of any malware attacks, nevertheless, we wish to share some beneficial ideas with you to make it much safer. Make certain to pay extremely attention while searching the web and particularly while getting cost-free programs. Do not open any suspicious email accessories, particularly if the sender is not understood to you.

Do not forget that specific freeware installer may likewise include some other extra apps in the package. These additional applications may be really harmful. It is of utmost importance to keep your anti-virus software and your operating system in general to be constantly correctly upgraded.

It is rather rational that downloading pirated software is illegal, nevertheless, additionally, such unauthorized apps use might likewise bring serious damage to your computer. For this reason, do not download any cracked programs. Plus, the fact that your present anti-virus did not protect the system from the Nesa ransomware is a good factor for you to reassess your options and switch to another program that can render the safeguarding functions on a far better level.

Below please find the quotation from the Nesa text file:

 Don't worry, you can return all your files!
 All your files like photos, databases, documents and other important are encrypted with strongest encryption and unique key.
 The only method of recovering files is to purchase decrypt tool and unique key for you.
 This software will decrypt all your encrypted files.
 What guarantees you have?
 You can send one of your encrypted file from your PC and we decrypt it for free.
 But we can decrypt only 1 file for free. File must not contain valuable information.
 You can get and look video overview decrypt tool:
 Price of private key and decrypt software is $980.
 Discount 50% available if you contact us first 72 hours, that's price for you is $490.
 Please note that you'll never restore your data without payment.
 Check your e-mail "Spam" or "Junk" folder if you don't get answer more than 6 hours.
 To get this software you need write on our e-mail:
 Reserve e-mail address to contact us:
 Our Telegram account:

Screenshot of files with “.nesa” extension added by the ransomware:”

Nesa Ransomware - encrypt files with .nesa extension

Use GridinSoft Anti-Malware to remove Nesa ransomware from your computer

1.Download GridinSoft Anti-Malware.

You can get GridinSoft Anti-Malware by clicking the button below:

  GridinSoft Anti-Malware

2. Double-click on the setup file.

When setup file has finished downloading, double-click on the setup-antimalware-ag.exe file to install GridinSoft Anti-Malware on your computer.
GridinSoft Anti-Malware
An User Account Control asking you about to allow GridinSoft Anti-Malware to make changes to your device. So, you should click “Yes” to continue with the installation.
GridinSoft Anti-Malware Setup

3. Press Install button for run GridinSoft Anti-Malware.

GridinSoft Anti-Malware Install

3.Once installed, GridinSoft Anti-Malware will automatically run.

GridinSoft Anti-Malware  Start

4. Wait for the GridinSoft Anti-Malware scan to complete.

GridinSoft Anti-Malware will automatically start scanning your computer for Win Speedup 2018 and other malicious programs. This process can take a 20-30 minutes, so we suggest you periodically check on the status of the scan process.
GridinSoft Anti-Malware Scan

5. Click on “Clean Now”.

When the scan has completed, you will see the list of infections that GridinSoft Anti-Malware has detected. To remove them click on the “Clean Now” button in right corner.
GridinSoft Anti-Malware Scan Result

User Review
0 (0 votes)
Comments Rating 0 (0 reviews)

About Daniel Zimmermann

Daniel Zimmermann has been writing on security and malware subjects for many years and has been working in the security industry for over 10 years. Daniel was educated at the Saarland University in Saarbrücken, Germany and currently lives in New York.

Check Also

How to get rid of adware

The pop-ups are a social engineering attack that tries to fool users into subscribing …

Leave a Reply

This site uses Akismet to reduce spam. Learn how your comment data is processed.