Djvu VirusRansomwareRemoval Guide

Nusm Virus Removal Guide (+Decrypt .nusm files)

Nusm – Ransomware

Nusm is a destructive software functioning as typical ransomware. Michael Gillespie, the widely known malware researcher, very first found this new name in the DJVU ransomware family.

Nusm was developed for the sole function to encrypt all popular file types. Rationally, as quickly as the encryption is effectively achieved, the users are not able to get access to them. Nusm virus adds its own “.nusm” to all the encrypted data. For instance, the file “price_list.xls”, when crypted by Nusm, will be entitled as “price_list.xls.nusm”. Once the file encryption is accomplished, Nusm puts its own distinct text document (_readme.txt) into all the folders that keep the encrypted files.

The alert stated by text file asking for the random os really comparable to the notifications given by other ransomware threats belonging to the DJVU family. The warning basically shows that the information has been encrypted and the only service to get access to it is to use a special standalone key. Regretfully, this statement is definitely real.

The technique to secure the files utilized by Nusm is not totally looked into. However, there is no doubt that each computer system owner may be released a special decryption key, which is definitely special. It is incredibly difficult to recuperate the data without the suitable type in location.

“Don’t worry, you can return all your files!”, from text file message:

Don't worry, you can return all your files! virus

One more peculiarity of the Nusm virus 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 criminals who have actually released the Nusm infection into the web. In order to get the key and bring back the important information, the users are told to get in touch with the scams by means of e-mail or by telegram and to pay the ransom in the quantity of $980.

The message likewise says that individuals must get in touch with the Nusm authors within 72 hours upon the moment of the data file encryption. The alert shows that by doing so individuals will obtain a 50% discount, for that reason, the ransom amount drops down to $490.

No matter what the amount of the ransom is, we strongly recommend that you do not pay the ransom. There is no assurance that these online scoundrels will keep their promises, so they may not care at all what the victims feel about the file encryption, even when the amount of the ransom is received into their accounts. Hence, paying ransom frequently does not lead to a successful healing. So, the users may simply lose their money for nothing.

Likewise, we prompt you not to call the frauds as they instruct. Do not transfer cash into their wallets. There are no applications that might break the Nusm ransomware or bring back the data at no charge. Therefore, the only right decision is to bring back the information from possible backups (if offered).

Virus Summary

NameNusm Ransomware
File Extensionnusm
TypeRansomware
FamilyDJVU
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-256 algorithm (CFB mode) encryption algorithm. Once the encryption is completed, the ransomware adds its special .nusm extension to all the files modified by it.
Distribution MethodAdware bundles and software cracks
Similar InfectionsLokas, Besub, Nusar
Nusm Removal Tool   GridinSoft Anti-Malware
Nusm Decryption Tool   Emsisoft Djvu Decryptor

Do not forget that the Internet is now filled with infections comparable to the Nusm ransomware. For instance, this particular threat is generally identical to Brusaf and other ransomware-type infections. These destructive energies have actually been developed in order to secure the crucial information and reveal the demand for the users to pay the ransom. All these infections use the identical algorithm to create the particular key for successful files decryption.

Unless the Nusm ransomware is still under the development procedure or has got some concealed bugs, it is not possible to bring back the information by hand. Hence, the only working solution to prevent the loss of your essential data is to routinely maintain updated backups of all your important data.

Another essential piece of suggestions is to keep the backups on special storage not linked to your primary computer. For example, you might keep it on the USB Flash Drive, or some external hard disk, or by using the cloud data storage services. Keeping the backups on your regular drive is very risky, considering that the backup may likewise be encrypted by the Nusm ransomware.

Leakages for the Nusm ransomware attack.

Nusm uses lots of courses to infiltrate the susceptible computer systems. It is not particular what specific approach was utilized in your case, nevertheless, the invasion might take place via the following channels:

  • bundling with third-party programs, generally freeware;
  • spam emails from the unidentified senders;
  • sites providing free hosting;
  • P2P (peer-to-peer) torrent downloads.

There are times when the Nusm virus may camouflage itself as some authentic application, for instance, through the deceptive notifies demanding installation of some software application update. This is the most typical technique utilized by the frauds to inject the Nusm virus files into the system. By doing this users partially take part in its setup, without clearly understanding the risk.

Furthermore, the scams may send out unsolicited spam e-mail with difficult alerts motivating individuals to open dubious attachments or click some download links, for instance, those encouraging the people to open specific photos, text files, tax files and other information.

No doubt, opening these files or clicking the malicious links may essentially harm the system. Fake Adobe Flash Player update alerts may cause the Nusm ransomware infiltration. Similarly, downloading the broken software may in addition contain the ransomware installer. The last but not the least, installation of Nusm may occur through some Trojan horses that might be set up stealthily into the system and without the user’s direct approval and even consent.

Preventing the Nusm virus injection.

Naturally, there is no outright assurance that your computer system will be always without any malware attacks, however, we want to share some helpful tips with you to make it safer. Make sure to pay really very close attention while browsing the web and particularly while downloading cost-free programs. Do not open any dubious e-mail accessories, particularly if the sender is not understood to you.

Do not forget that particular freeware installer might also contain some other additional apps in the bundle. These additional applications might be really destructive. It is of utmost significance to keep your anti-virus software application and your operating system in basic to be always properly updated.

It is rather logical that downloading pirated software is unlawful, however, additionally, such unauthorized software application use might also bring serious damage to your system. For this reason, do not download any split programs. Plus, the reality that your current anti-virus did not secure the system from the Nusm ransomware is a good reason for you to reevaluate your choices and change to another program that can render the securing functions on a much better level.

Below please find the quotation from the Nusm text file:

ATTENTION!
 
 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:
 https://we.tl/t-2P5WrE5b9f
 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:
 restorealldata@firemail.cc
  
 Reserve e-mail address to contact us:
 gorentos@bitmessage.ch 

 Our Telegram account:
 @datarestore

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

Nusm Ransomware - encrypt files with .nusm extension

Use GridinSoft Anti-Malware to remove Nusm 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

Use Emsisoft Decryptor for restore nusm files

You can download Emsisoft Decryptor by clicking the button below:

  Emsisoft Decryptor

  1. Run the decryptor as an administrator. The license terms will show up, which you have to agree to by clicking the “Yes” button.
  2. Once the license terms are accepted, the primary decryptor user interface opens.
  3. By default, the decryptor will pre-populate the locations to decrypt with the currently connected drives and network drives. Additional locations can be added using the Add” button.
  4. Decryptors typically offer various options depending on the particular malware family. The available options are located in the Options tab and can be enabled or disabled there. You can find a detailed list of the available Options below.
  5. After you have added all the locations you want to decrypt to the list, click the “Decrypt” button to start the decryption process. The screen will switch to a status view, informing you about the current process and decryption status of your files
  6. The decryptor will inform you once the decryption process is finished. If you require the report for your personal records, you can save it by clicking the “Save log” button. You can also copy it straight to your clipboard to paste it into emails or forum posts if you are asked to.
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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.

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