MAAS ransomware locks personal files using encryption for a ransom
Contents
MAAS ransomware is a file-encrypting virus that is designed to maliciously modify all personal files on the affected computer and demand a ransom for the unlocking means. Encrypted files are marked with .MAAS file extension and become inaccessible for computer users. Cyber criminals leave a message in a form of _Readme.txt file and urge to contact them for payment details via helpmanager@mail.ch or restoremanager@airmail.cc e-mail addresses. Note that this cyber threat is the latest active variant from the infamous STOP/DJVU ransomware family.
The majority of file-encrypting viruses from this family (ZIDA, USAM, VAWE, etc), including this current ransomware spread using deceptive techniques, such as fake Adobe update pop-ups. Once installed, it shows an imitation of a Windows update screen while encrypting almost all data on the computer with the AES-256 cryptographic algorithm. As soon as the encryption process is finished, users cannot open or use any of the encoded files that are marked with .maas file extension.
Additionally, this ransomware is capable to modify Windows hosts file and embed malicious codes. They are programmed to block the network connection to any type of security websites and tools. In other words, victims are unable to search for help online or run security software on the infected system. Likewise, many people struggle with MAAS removal and get lost when they see the ransom note.
Details of the ransom note
Developers have created a message that appears after the encryption process and informs users about the ransomware attack. They point out that there is a possibility to restore corrupted data if the victims agree to pay up. In fact, they demand to transfer $490 in Bitcoins within the first 72 hours of the infection for a decryption tool. It is considered to be a 50% discount as later the price doubles to $980.
The transcript of _Readme.txt ransom note is shown in the image below.
However, there have been numerous cases with previous STOP/DJVU variants that cybercriminals simply disappeared after they received the payment and never sent MAAS decryptor to the victims. Even though the attackers try to comfort their victims, people should never trust them as they are cybercriminals. Otherwise, many people might suffer from financial losses or other significant consequences.
All security experts advise to never even try to contact the attackers and remove MAAS ransomware virus instead. People should also be aware that this file-encrypting malware family is known for installing AZORULT password-stealing software. Thus, the elimination procedure should be automatic to get rid of all cyber threats at once. We suggest installing the RESTORO tool to help you.
Current situation regarding MAAS file decryption:
The decryptor isn’t available.
Check back soon as keys for VAWE and USAM, the latest versions, is already available.
If you are in a rush, you can repair video files using instructions provided in this guide.
Summary of the cryptomalware
| Name | MAAS Ransomware |
| Type | Ransomware, File-encrypting virus, Cryptomalware |
| Family | STOP/DJVU |
| Other variants | ZIPE, PEZI, PYKW, MOBA, NLAH, ZIDA, VAWE, USAM, etc |
| Extension | .maas |
| Malicious process name | ED11.tmp.exe |
| HD5 | 9BD737B220A4040DBCAF17F48BE54A98 |
| Ransom note | _Readme.txt |
| Ransom demanded | $490 with 50% within the first 72 hours of the infection; later, it doubles to $980 |
| Contacts | helpmanager@mail.ch and restoremanager@airmail.cc |
| Symptoms | It displays a fake Windows Update screen while encrypting data, computer might slow down for a while; later, personal files are found marked with .maas extension and can no longer be opened. Ransom note is saved in every affected data folder. |
| Damage | It encodes very important files on the system and they are no longer accessible; Also, it drops a password stealer AZORULT and modifies HOSTS file so that the victim could not access specific websites online |
| Decryption options | Currently, there is no decryption software available for this version. You can try repairing your files using these file recovery guidelines. |
| Removal | Remove the virus using anti-malware tool. For virus damage repair, you can install RESTORO. |
Threat Review
Name: MAAS Ransomware
Description: MAAS ransomware, also known as MAAS file virus, is a malicious crypto-malware that makes files inaccessible in order to demand a ransom from the victim. The malicious program is a variant of the infamous STOP/DJVU malware. Once encrypted, files can no longer be opened, and the victim finds a ransom note _readme.txt, which contains a message from the cybercriminals: pay the ransom or lose the data for good.
Offer price: 490-980
Currency: USD
Operating System: Windows
Application Category: Ransomware (malware)
Author: STOP/DJVU authors
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DAMAGE
(5)
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DISTRIBUTION
(5)
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ENCRYPTION STRENGTH
(5)
Overall
5In-motion demonstration of live Maas ransomware attack, after which files can no longer be opened:
Primary STOP/DJVU distribution methods: software cracks and malicious online ads
The primary MAAS ransomware distribution method is based on illegal software downloads. The malware developers tend to pack fake peer-to-peer downloads with ransomware executables and upload them to popular torrent websites. Users who visit these sites and search for software cracks for popular software such as Adobe Photoshop or games are the primary targets for the cybercriminals. Once they download and open the malicious files, the ransomware immediately encrypts all files and leaves the victim no option to open them than paying a ransom.
In addition, the ransomware developers created a very effective way to spread infections — they upload fake Adobe Flash Player update pop-ups that trigger automatic installation of file-encrypting viruses. They have designed the malicious pop-up to look almost exactly the same as the legitimate update notifications. Likewise, the majority of people fall for the trick and install ransomware by clicking on the update button.
Usually, people can encounter such deceptive pop-ups while browsing on highly suspicious pages that redirect people to various advertisements and questionable networks. Note that other unverified ads can also hold malicious codes and trigger malware installation. Therefore, you should refrain from clicking on any form of advertising content while browsing on the Internet. Otherwise, you risk installing file-encrypting viruses and other dangerous cyber threats.
Finally, experts advise to never download suspicious applications and get software only from legitimate websites. Cybercriminals also tend to upload files with ransomware executables that look like well-known applications on peer-to-peer (P2P) websites. Never browse on them and do not install any programs from it under any circumstances. This way you will significantly decrease the risk of malware infiltration.
Remove MAAS ransomware virus and recover your files
Before you can try to decrypt the affected files, you must first remove MAAS ransomware virus from your system. The only safe way to do so is to install a professional malware removal tool. Our team recommend RESTORO as it can not only help you uninstall the file-encrypting virus but also delete the password-stealing software that was installed alongside. Although, you can use another antivirus of your choice.
If you are unable to start MAAS file virus removal, you should decontaminate the malicious codes running on your system by booting your PC into Safe Mode. It is an easy process. However, in case you are an inexperienced computer user, we suggest following the elimination guidelines at the end of this article. They will show you how to run a full system scan without any disruptions.
Later, you can try to restore the encrypted data. For that, the best way is to use the latest backup copy from your Cloud. Although, if you do not store backups, you might try alternative STOP/DJVU decryption methods. Just be aware that other cybercriminals might try to trick you into purchasing useless decryption software online. Do not fall for these scams and follow only expert’s advice.
You can find currently available file recovery tools, including video file repair tool usage instructions in the guide below or in the aforementioned article containing decryption instructions.
OUR GEEKS RECOMMEND
Our team recommends a two-step rescue plan to remove ransomware and other remaining malware from your computer, plus repair caused virus damage to the system:
STEP 1. REMOVE AUTOMATICALLY WITH ROBUST ANTIVIRUS
STEP 2. REPAIR VIRUS DAMAGE TO YOUR COMPUTER
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MAAS ransomware Removal Guidelines
Method 1. Enter Safe Mode with Networking
Step 1. Start Windows in Safe Mode with Networking
Before you try to remove MAAS ransomware virus, you must start your computer in Safe Mode with Networking. Below, we provide the easiest ways to boot PC in the said mode, but you can find additional ones in this in-depth tutorial on our website – How to Start Windows in Safe Mode. Also, if you prefer a video version of the tutorial, check our guide How to Start Windows in Safe Mode on Youtube.
Instructions for Windows XP/Vista/7 users
- First of all, turn off your PC. Then press the Power button to start it again and instantly start pressing F8 button on your keyboard repeatedly in 1-second intervals. This launches the Advanced Boot Options menu.
- Use arrow keys on the keyboard to navigate down to Safe Mode with Networking option and press Enter.
Instructions for Windows 8/8.1/10/11 users
- Open Windows Start menu, then press down the Power button. On your keyboard, press down and hold the Shift key, and then select Restart option.
- This will take you to Windows Troubleshoot screen. Choose Troubleshoot > Advanced Options > Startup Settings > Restart. Tip: If you can't find Startup Settings, click See more recovery options.
- In Startup Settings, press the right key between F1-F9 to enter Safe Mode with Networking. In this case, it is the F5 key.
Step 2. Remove files associated with the virus
Now, you can search for and remove MAAS ransomware files. It is very hard to identify files and registry keys that belong to the ransomware virus, Besides, malware creators tend to rename and change them repeatedly. Therefore, the easiest way to uninstall such type of a computer virus is to use a reliable security program such as INTEGO Antivirus. For virus damage repair, consider using RESTORO.
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Compatibility: Microsoft Windows
See Full Review
RESTORO is a unique PC Repair Tool which comes with an in-built Avira scan engine to detect and remove spyware/malware threats and uses a patented technology to repair virus damage. The software can repair damaged, missing or malfunctioning Windows OS files, corrupted DLLs, and more. The free version offers a scan that detects issues. To fix them, license key for the full software version must be purchased.
Method 2. Use System Restore
In order to use System Restore, you must have a system restore point, created either manually or automatically.
Step 1. Boot Windows in Safe Mode with Command Prompt
Instructions for Windows XP/Vista/7 users
- Shut down your PC. Start it again by pressing the Power button and instantly start pressing F8 button on your keyboard repeatedly in 1-second intervals. You will see Advanced Boot Options menu.
- Using arrow keys on the keyboard, navigate down to Safe Mode with Command Prompt option and press Enter.
Instructions for Windows 8/8.1/10/11 users
- Launch Windows Start menu, then click the Power button. On your keyboard, press down and hold the Shift key, and then choose Restart option with the mouse cursor.
- This will take you to Windows Troubleshoot screen. Choose Troubleshoot > Advanced Options > Startup Settings > Restart. Tip: If you can't find Startup Settings, click See more recovery options.
- In Startup Settings, press the right key between F1-F9 to enter Safe Mode with Command Prompt. In this case, press F6 key.
Step 2. Start System Restore process
- Wait until system loads and command prompt shows up.
- Type cd restore and press Enter, then type rstrui.exe and press Enter. Or you can just type %systemroot%system32restorerstrui.exe in command prompt and hit Enter.
- This launches System Restore window. Click Next and then choose a System Restore point created in the past. Choose one that was created before ransomware infection.
- Click Yes to begin the system restoration process.
After restoring the system, we recommend scanning the system with antivirus or anti-malware software. In most cases, there won't be any malware remains, but it never hurts to double-check. In addition, we highly recommend checking ransomware prevention guidelines provided by our experts in order to protect your PC against similar viruses in the future.
Alternative software recommendations
Malwarebytes Anti-Malware
Removing spyware and malware is one step towards cybersecurity. To protect yourself against ever-evolving threats, we strongly recommend purchasing a Premium version of Malwarebytes Anti-Malware, which provides security based on artificial intelligence and machine learning. Includes ransomware protection. See pricing options and protect yourself now.
System Mechanic Ultimate Defense
If you're looking for an all-in-one system maintenance suite that has 7 core components providing powerful real-time protection, on-demand malware removal, system optimization, data recovery, password manager, online privacy protection and secure driver wiping technology. Therefore, due to its wide-range of capabilities, System Mechanic Ultimate Defense deserves Geek's Advice approval. Get it now for 50% off. You may also be interested in its full review.
Disclaimer. This site includes affiliate links. We may earn a small commission by recommending certain products, at no additional cost for you. We only choose quality software and services to recommend.
Decrypt MAAS files
Fix and open large MAAS files easily:
It is reported that STOP/DJVU ransomware versions encrypt only the beginning 150 KB of each file to ensure that the virus manages to affect all files on the system. In some cases, the malicious program might skip some files at all. That said, we recommend testing this method on several big (>1GB) files first.
- Create a copy of encrypted file to a separate folder using Copy > Paste commands.
- Now, right-click the created copy and choose Rename. Select the MAAS extension and delete it. Press Enter to save changes.
- In the prompt asking whether you want to make the changes as file might become unusable, click OK.
- Try opening the file.
STOP/DJVU decryption tool usage guide
STOP/DJVU ransomware versions are grouped into old and new variants. MAAS ransomware is considered the new STOP/DJVU variant, just like DARJ DAZX, TYWD, TYCX, TYOS, TYPO, JYWD (find full list here). This means full data decryption is now possible only if you have been affected by offline encryption key. To decrypt your files, you will have to download Emsisoft Decryptor for STOP DJVU, a tool created and maintained by a genius security researcher Michael Gillespie.
Note! Please do not spam the security researcher with questions whether he can recover your files encrypted with online key - it is not possible.
In order to test the tool and see if it can decrypt MAAS files, follow the given tutorial.
- Download the decryption tool from Emsisoft.
- Click the little arrow next to your download and choose Show in Folder.
- Now, right-click the file and choose Run as Administrator. If asked, enter administrator's password.
- In UAC window, click Yes.
- Click Yes to agree to software terms in both windows.
- The tool will automatically include C:// disk as a location to decrypt. The file recovery tool will prepopulate the locations to scan, including connected data storage drives or network drives. Click Add folder if you wish to add additional locations.
In Options tab, you can choose to keep encrypted file copies. We recommend leaving this option selected, especially if you do not know if the decryption tool will work. - Click Decrypt to start restoring MAAS files. You will see the progress in the Results tab. Here, you can see messages from the tool, such as whether the decryption procedure is successful, or you need to wait for an update.
You might also be informed that online key was used to encrypt your files. In such case, the decryption tool won't work for you, and the only way to recover your files is to use a data backup.
Meanings of decryptor's messages
The MAAS decryption tool might display several different messages after failed attempt to restore your files. You might receive one of the following messages:
Error: Unable to decrypt file with ID: [example ID]
This message typically means that there is no corresponding decryption key in the decryptor's database.
No key for New Variant online ID: [example ID]
Notice: this ID appears to be an online ID, decryption is impossible
This message informs that your files were encrypted with online key, meaning no one else has the same encryption/decryption key pair, therefore data recovery without paying the criminals is impossible.
Result: No key for new variant offline ID: [example ID]
This ID appears to be an offline ID. Decryption may be possible in the future.
If you were informed that an offline key was used, but files could not be restored, it means that the offline decryption key isn't available yet. However, receiving this message is extremely good news, meaning that it might be possible to restore your MAAS extension files in the future. It can take a few months until the decryption key gets found and uploaded to the decryptor. We recommend you to follow updates regarding the decryptable DJVU versions here. We strongly recommend backing up your encrypted data and waiting.
Report Internet crime to legal departments
Victims of MAAS ransomware should report the Internet crime incident to the official government fraud and scam website according to their country:
- In the United States, go to the On Guard Online website.
- In Australia, go to the SCAMwatch website.
- In Germany, go to the Bundesamt für Sicherheit in der Informationstechnik website.
- In Ireland, go to the An Garda Síochána website.
- In New Zealand, go to the Consumer Affairs Scams website.
- In the United Kingdom, go to the Action Fraud website.
- In Canada, go to the Canadian Anti-Fraud Centre.
- In India, go to Indian National Cybercrime Reporting Portal.
- In France, go to the Agence nationale de la sécurité des systèmes d’information.
If you can't find an authority corresponding to your location on this list, we recommend using any search engine to look up "[your country name] report cyber crime". This should lead you to the right authority website. We also recommend staying away from third-party crime report services that are often paid. It costs nothing to report Internet crime to official authorities.
Another recommendation is to contact your country's or region’s federal police or communications authority.
Frequently Asked Questions
You can only open MAAS files if you have the decryption key, or if you were affected by offline encryption type.
To figure out whether you were affected by offline encryption, please go to C:/SystemID/PersonalID.txt and see if the string inside of it ends in t1. You can also try using Emsisoft Decryptor for STOP/DJVU.
Please follow the guidances provided by the official MAAS decryption tools and believe what they say. If they say it is impossible to decrypt, it really is so. There is no magic tool or human capable of decrypting your files hiding somewhere. Encryption is a technique created to be nearly impossible to decrypt without a special private key (held by the criminals).
We advise scanning with anti-virus, anti-malware, malware removal tools or software like RESTORO to eliminate virus damage on the system. If you do not trust using a single tool, try running one after another. However, we do not recommend keeping several security programs on a computer at once as they can interfere with each other's work.
Beware of fake MAAS decryption tools circulating around the web. Cyber criminals are uploading them to various shady websites, also might be promoting them via suspicious Youtube videos. These programs can infect your computer even more heavily (Trojans, miners, etc.). We suggest being extremely cautious around the web. If there will be an official STOP/DJVU decryption tool available, it will be widely discussed in public media.
Scott Bolton is a senior content strategist in our Geek’s Advice team. He is exceptionally passionate about covering the latest information technology themes and inspire other team members to follow new innovations. Despite the fact that Scott is an old-timer among the Geeks, he still enjoys writing comprehensive articles about exciting cybersecurity news or quick tutorials.
Thanks, I have removed the ransomware and restored my data from a backup. I really understood why backups are important now…
Did you find this review helpful? Yes (1) No
Good guide
A finally useful guide than all those copy-paste ones. I have managed to fix some files using methods recommended. Thanks a lot. Waiting for the fully-functioning decryptor!
Did you find this review helpful? Yes No
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! 🙁
Help, please 🙁
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?! 🙁
please!!
(in _Readme.txt file existing some information – like “personal ID”:
personal ID:
0239yjnkjddrtE5DMIS3Gw5cHY65NU0GRo0mv1VHtGbxEDzXgJRBI
..maybe that’s ID, that information helps in making decriped tool… really don’t know. 🙁
can you help and make that tool please?! 🙁
please..
Ivan
Will the attackers be able to see my files(images and videos)
No, they won’t.
great tips on removing ransomware
Thank you, I removed the malware using suggested software and currently trying to restore my files using Media_Repair. Will let you know if this works
Did you find this review helpful? Yes No