Djvu VirusRansomwareRemoval Guide

Maas Virus Removal Guide (+Decrypt .maas files)

Maas Virus – Details

Maas is a harmful software working as typical ransomware. Michael Gillespie, the popular virus researcher, first found this new name in the DJVU ransomware family.

Maas was developed for the sole purpose to encrypt all popular file types. Logically, as quickly as the file encryption is successfully accomplished, the users are unable to get access to them. Maas virus adds its own “.maas” to all the encrypted files. For example, the file “price_list.xls”, when crypted by Maas, will be entitled as “price_list.xls.maas”. Once the file encryption is achieved, Maas puts its own special text file (_readme.txt) into all the folders that store the encrypted files.

The alert stated by document asking for the random os very similar to the notifications given by other ransomware dangers belonging to the DJVU family. The warning basically shows that the data has been encrypted 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 Maas is not completely investigated. Nevertheless, there is no doubt that each computer system owner might be issued an unique decryption key, which is absolutely distinct. It is extremely tough to recuperate the information without the proper key in location.

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

message from Maas virus

One more peculiarity of the Maas virus is that the users are unable to get access to the key. The decrypting key is hosted on an unique server under the total control by the criminals who have released the Maas ransomware into the internet. In order to acquire the key and bring back the crucial data, the users are told to get in touch with the frauds by means of email or by telegram and to pay the ransom in the quantity of $980.

The message likewise says that the people must call the Maas authors within 72 hours upon the minute of the data encryption. The alert indicates that by doing so individuals will obtain a 50% discount, therefore, the ransom quantity falls to $490.

No matter what the quantity of the ransom is, we highly advise that you do not pay the ransom. There is no guarantee that these online scoundrels will keep their guarantees, 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. Thus, paying ransom often does not result in a successful healing. So, the users may merely lose their money for nothing.

Similarly, we urge you not to get in touch with the frauds as they advise. Do not transfer money into their wallets. There are no applications that could break the Maas ransomware or restore the information for free. For that reason, the only right choice is to bring back the data from possible backups (if offered).

Virus Summary

NameMaas Ransomware
File Extensionmaas
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 .maas extension to all the files modified by it.
Distribution MethodAdware bundles and software cracks
Similar InfectionsZida, Pykw, Moba
Maas Removal Tool   GridinSoft Anti-Malware
Maas Decryption Tool   Emsisoft Djvu Decryptor

Do not forget that the Web is now loaded with infections similar to the Maas ransomware. For example, this particular hazard is generally identical to Brusaf and other ransomware-type infections. These harmful utilities have been established in order to encrypt the essential data and reveal the demand for the users to pay the ransom. All these infections utilize the similar algorithm to produce the particular key for effective information decryption.

Unless the Maas ransomware is still under the advancement procedure or has got some concealed bugs, it is not possible to bring back the data by hand. Hence, the only working service to prevent the loss of your essential information is to routinely maintain up-to-date backups of all your important files.

Another crucial piece of suggestions is to keep the backups on special storage not connected to your main PC. 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 system drive is extremely dangerous, given that the backup might also be encrypted by the Maas ransomware.

Leaks for the Maas ransomware attack.

Maas uses many courses to penetrate the vulnerable computer systems. It is not certain what particular approach was utilized in your case, however, the invasion might take place by means of the following channels:

  • bundling with third-party programs, primarily free apps;
  • spam e-mails from the unidentified senders;
  • sites supplying complimentary hosting;
  • P2P (peer-to-peer) torrent downloads.

There are times when the Maas ransomware may disguise itself as some genuine application, for example, through the deceptive alerts demanding installation of some software application update. This is the most typical trick utilized by the frauds to inject the Maas virus files into the system. This way users partly participate in its setup, without plainly understanding the danger.

Moreover, the scams may send unsolicited spam e-mail with tricky signals motivating individuals to open dubious attachments or click on some download links, for instance, those motivating individuals to open particular pictures, text files, tax documents and other info.

No doubt, opening these files or clicking on the malicious links may essentially damage the system. Fake Acrobat Reader update alerts may result in the Maas ransomware seepage. Likewise, downloading the split software may furthermore consist of the ransomware installer. The last but not the least, installation of Maas might take place through some Trojan horses that might be installed stealthily into the system and without the user’s direct consent and even permission.

Preventing the Maas injection.

Obviously, there is no outright warranty that your computer system will be constantly free of any malware attacks, nevertheless, we want to share some beneficial pointers with you to make it safer. Make certain to pay very attention while searching the web and especially while getting cost-free programs. Do not open any suspicious email accessories, specifically if the sender is not known to you.

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

It is quite sensible that downloading pirated apps is prohibited, nevertheless, in addition, such unapproved apps usage may also bring major damage to your PC. Thus, do not download any cracked programs. Plus, the reality that your present anti-virus did not protect the system from the Maas ransomware is a great factor for you to reevaluate your choices and change to another program that can render the securing functions on a far better level.

Below please find the quotation from the Maas 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:

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

1.Download GridinSoft Anti-Malware.

You can download 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 maas 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 โ€œSave logโ€ 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 Saarbrรผcken, Germany and currently lives in New York.

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  1. i tried after removing ransomware but the descriptor says description not possible data is decryted my online key any solution??

  2. Dear sir, hello there.

    (hope, these message found you in your good health and good people around you).

    my name is Ivan. my work & personal computer is infected whit: .Mass ransomeware virus/malware/adware

    just want to please you, begin’ you, ask you, Can you help please, sir?!

    can you make: .maas ransomware decryptor/decrypted tool, sir, please?! Please!?

    please! ๐Ÿ™

    Help, please ๐Ÿ™

    whole Life, whole work, whole documents, whole pictures, even and My Family, our life’s, lifes of children, whole everything we done depends becouse of that decripting tool!!

    can you help and make that tool please?! ๐Ÿ™


    (in _Readme.txt file existing some information – like “personal ID”:

    personal ID:

    ..maybe that’s ID, that information helps in making decriped tool… really don’t know. ๐Ÿ™

    can you help and make that tool please?! ๐Ÿ™



  3. need Help :'{
    No key for New Variant online ID: OHAhTsUrVzG1NeQPGkBls6lXzgyxDYZaJbpVEodB
    Notice: this ID appears to be an online ID, decryption is impossible

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