Click on screenshot to zoom
Danger level 7
Type: Trojans
Common infection symptoms:
  • Slow Computer
  • System crashes
  • Normal system programs crash immediatelly
  • Connects to the internet without permission
  • Installs itself without permissions
  • Can't be uninstalled via Control Panel

Nesa Ransomware

Nesa Ransomware is not a unique infection. Although the name is new, the infection itself is old, and we have seen it many times before. In the past, it took on many other names, including Meds Ransomware, Dutan Ransomware, or Zatrov Ransomware. According to our research team, all of these threats are part of the STOP Ransomware family, and they appear to have been created by the same attacker, or group of attackers. Needless to say, these infections operate as individual threats, and so all of them have to be analyzed individually too. That being said, they all have the same features, and the same removal methods can be applied to delete them all. In this report, of course, we focus on the removal of Nesa Ransomware. Is this the infection you need to eliminate from your Windows operating system? If you are not sure, all you have to do is look at the names of your personal files.

The “.nesa” extension is supposed to be attached to the files that Nesa Ransomware encrypts. During the attack, the infection changes the data within these files using an encryption key, and if that is done successfully, the files are locked, and you cannot access them normally. While the files might look like they were destroyed, the reality is that the right decryptor should restore them. Unfortunately, it is unlikely that you can obtain a decryptor. First of all, legitimate decryptors that are available for free cannot help with this malware due to the complexity of the encryptor. Second, the decryptor offered by the cybercriminals was offered, well, by cybercriminals. They are glad to offer it to you, but they do it just so that they could take your money, and there are no guarantees that they would help you restore your files once that money was in their pockets. Needless to say, this is the main reason we do not recommend following the instructions that Nesa Ransomware introduces to all of its victims.

The instructions presented by the cybercriminals behind Nesa Ransomware are delivered via a text file. It is called “_readme.txt,” and you should find it in the local drive along with the folder named SystemID. We recommend deleting both of these components. If you open the text file, you will face the “ATTENTION!” message that informs about encryption and also demands a ransom of $980 (or $490) to be paid in return for a decryptor. To receive more information about the payment, the message instructs to send an email to or Since these email addresses have been used by all of the previously mentioned clones, we believe that the same attackers stand behind them all. Of course, if you initiate communication with cybercriminals, they will make promises to decrypt your files, but you cannot trust them. They will do whatever it takes to get your money, and making you think that there is something for you in it is one of the tricks. Of course, if you have paid the ransom, you cannot get the money back, and so do not focus on that. Focus on removing Nesa Ransomware.

Are you interested in deleting Nesa Ransomware manually? If you are, the guide below is for you. As you can see, not all components have known names, and so it might be more difficult to delete this threat, but if you have any questions, you can always post a comment below. Also, remember that you have other options too. One of them is to install anti-malware software. It will automatically remove Nesa Ransomware, and if other threats exist, they will be eliminated too. While the infection is usually spread using spam emails or via remote access backdoors, Trojans could be responsible for dropping and executing them too, which is why you need to be extremely cautious about additional threats. Another reason to install anti-malware software is Windows protection. If you do not implement security tools, your system will remain vulnerable, and new threats could try to attack it again and again. Even if you decide to delete the ransomware manually now, do not forget to install anti-malware software at the first chance you get.

Nesa Ransomware Removal

  1. Launch Windows Explorer by tapping keys Win+E.
  2. In the menu on the left click This PC and then move to Local Drive.
  3. Delete the file named _readme.txt and the folder named SystemID.
  4. Into the quick access field at the top, enter %LOCALAPPDATA% (Windows XP users enter %USERPROFILE%\Local Settings\Application Data\).
  5. Delete the [random name] folder that contains malware files.
  6. Also Delete all recently downloaded files (could be placed anywhere).
  7. Empty Recycle Bin and then quickly run a system scan using a legitimate malware scanner.
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