How to remove Mozart malicious program from a computer?

Also Known As: Mozart virus
Type: Trojan
Distribution: Moderate
Damage level: Severe

Mozart virus removal guide

What is Mozart malware?

Mozart is the name of a malicious software that allows attackers (cyber criminals) to execute various commands on infected computer through the DNS protocol. This communication method helps cyber criminals to avoid detection by security software. Mozart is categorized as malware loader, which means it could be used to execute commands that would cause download and installation of various malicious software. If there is a reason to believe that a computer is infected with Mozart, then this malware should be removed as soon as possible.

Mozart malware

Cyber criminals behind Mozart may use it to infect a computer with malicious software like ransomware, remote access trojan, cryptocurrency miner, or other malware. Ransomware is a type of software that encrypts files that are stored on victim's computer. In most cases developers of a certain ransomware are the only ones who have tools that can decrypt victim's files. Basically, victims cannot decrypt their files without tools that can be purchased only from cyber criminals who designed ransomware. Remote access trojans (RATs) are programs that cyber criminals use to remotely control infected machines and perform various actions that would help them to generate revenue. As a rule, they use RATs with a purpose to steal personal, sensitive information like credentials (logins, passwords) of various accounts, credit card details (and other banking information) so they could misuse it to make fraudulent transactions, purchases and/or generate revenue in other ways. It is common that they use RATs to install various malicious software, monitor computing activities and perform other actions as well. Cryptocurrency miners are programs that mine cryptocurrency by using computer hardware (like GPU and CPU) to solve mathematical problems. Simply said, cyber criminals attempt to use other computers to generate revenue. Users of those computers receive higher electricity bills, experience decrease in computer's performance, system crashes, and other issues. Installed miner could cause hardware overheat, loss of unsaved data, and other problems as well. It is possible that cyber criminals may use Mozart to infect systems with other malware as well.

Threat Summary:
Name Mozart virus
Threat Type Malware loader, backdoor
Detection Names Avast (Win32:Trojan-gen), BitDefender (Trojan.GenericKD.42527027), ESET-NOD32 (A Variant Of Win32/Agent.ABNT), Kaspersky (Trojan.Win32.Denes.cdt), Full List (VirusTotal)
Payload Mozart could be used to infect operating systems with a variety of malicious programs.
Symptoms Trojans are designed to stealthily infiltrate the victim's computer and remain silent, and thus no particular symptoms are clearly visible on an infected machine.
Distribution methods Infected email attachments, malicious online advertisements, social engineering, software 'cracks'.
Damage Stolen passwords and banking information, identity theft, the victim's computer added to a botnet.

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Having a computer infected with Mozart may cause a variety of serious problems like monetary, data loss, identity theft, issues related to privacy, browsing safety, and so on. More examples of programs of this kind are Urelas, Borr and GrandSteal. In most cases cyber criminals attempt to infect systems with such malware so they could infect them with more malware and/or steal sensitive information that could be misused to generate revenue in one or another way.

How did Mozart infiltrate my computer?

Research shows that cyber criminals spread Mozart through spam campaigns by sending emails with a malicious PDF document attached to them. When opened, it displays a notification saying that PDF Viewer does not support font of this document and encourages to download a correct font through a provided link which downloads an archive (ZIP) file. That file contains a malicious executable file which, if executed/opened, installs Mozart. More examples of attachments that cyber criminals often attach to their emails are Microsoft Office documents, executable files (like .exe), archive files like ZIP, RAR and JavaScript files. Either way, their main goal is to trick recipients into opening the attached file which is designed to install one or another malicious program. However, this is not the only way to spread malware. Quite often cyber criminals do that by using unofficial software activation ('cracking') tools, Trojans, unofficial software updaters and untrustworthy software download channels, tools as well. Software 'cracking' tools are programs that supposed to allow their users to activate licensed software for free. In other words, to bypass its activation. Nevertheless, quite often tools of this type are designed to install malware instead of activating some installed software. Trojans are malicious programs that often are designed to cause chain infections. When installed, they cause installation of other malware. Examples of untrustworthy software download sources, tools are Peer-to-Peer networks (e.g., torrent clients, eMule), freeware download or free file hosting pages, third party downloaders, installers and other tools of this kind. Quite often cyber criminals use them to host, distribute various malicious files. They disguise those files as harmless, legitimate and hope that someone will download and open them. By doing so people cause installation of malicious software by themselves. Fake software updaters infect operating systems by installing malware instead of updates, fixes, or by exploiting bugs, flaws of some outdated software that is already installed on the operating system.

How to avoid installation of malware?

Attachments or web links in irrelevant emails that are received form unknown, suspicious addresses should not be trusted (opened). Software and files should be downloaded from official websites and through direct links. Other sources, tools (examples are mentioned in the previous paragraph) can be and often are used to proliferate malicious programs. Installed software must be updated with tools and/or by using functions that are provided by official developers. If installed program is not free and it needs to be activated, then it should be done properly as well. Various 'cracking' tools (unofficial activation programs) often are designed to install malicious software. Besides, it is not legal to activate licensed software with programs of this type. One more way to keep operating systems/computers safe is to regularly scan them with a reputable antivirus or anti-spyware suite and eliminate detected threats as soon as possible. Additionally, it is important to keep such software up-to-date. If you believe that your computer is already infected, we recommend running a scan with Spyhunter for Windows to automatically eliminate infiltrated malware.

Malicious PDF document that is used to spread Mozart malware:

Malicious PDF document distributing Mozart malware

Instant automatic malware removal: Manual threat removal might be a lengthy and complicated process that requires advanced computer skills. Spyhunter is a professional automatic malware removal tool that is recommended to get rid of malware. Download it by clicking the button below:
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How to remove malware manually?

Manual malware removal is a complicated task - usually it is best to allow antivirus or anti-malware programs to do this automatically. To remove this malware we recommend using Spyhunter for Windows. If you wish to remove malware manually, the first step is to identify the name of the malware that you are trying to remove. Here is an example of a suspicious program running on a user's computer:

malicious process running on user's computer sample

If you checked the list of programs running on your computer, for example, using task manager, and identified a program that looks suspicious, you should continue with these steps:

manual malware removal step 1Download a program called Autoruns. This program shows auto-start applications, Registry, and file system locations:

screenshot of autoruns application

manual malware removal step 2Restart your computer into Safe Mode:

Windows XP and Windows 7 users: Start your computer in Safe Mode. Click Start, click Shut Down, click Restart, click OK. During your computer start process, press the F8 key on your keyboard multiple times until you see the Windows Advanced Option menu, and then select Safe Mode with Networking from the list.

Safe Mode with Networking

Video showing how to start Windows 7 in "Safe Mode with Networking":

Windows 8 users: Start Windows 8 is Safe Mode with Networking - Go to Windows 8 Start Screen, type Advanced, in the search results select Settings. Click Advanced startup options, in the opened "General PC Settings" window, select Advanced startup. Click the "Restart now" button. Your computer will now restart into the "Advanced Startup options menu". Click the "Troubleshoot" button, and then click the "Advanced options" button. In the advanced option screen, click "Startup settings". Click the "Restart" button. Your PC will restart into the Startup Settings screen. Press F5 to boot in Safe Mode with Networking.

Windows 8 Safe Mode with networking

Video showing how to start Windows 8 in "Safe Mode with Networking":

Windows 10 users: Click the Windows logo and select the Power icon. In the opened menu click "Restart" while holding "Shift" button on your keyboard. In the "choose an option" window click on the "Troubleshoot", next select "Advanced options". In the advanced options menu select "Startup Settings" and click on the "Restart" button. In the following window you should click the "F5" button on your keyboard. This will restart your operating system in safe mode with networking.

windows 10 safe mode with networking

Video showing how to start Windows 10 in "Safe Mode with Networking":


manual malware removal step 3Extract the downloaded archive and run the Autoruns.exe file.

extract and run autoruns.exe

manual malware removal step 4In the Autoruns application, click "Options" at the top and uncheck "Hide Empty Locations" and "Hide Windows Entries" options. After this procedure, click the "Refresh" icon.

Click 'Options' at the top and uncheck 'Hide Empty Locations' and 'Hide Windows Entries' options

manual malware removal step 5Check the list provided by the Autoruns application and locate the malware file that you want to eliminate.

You should write down its full path and name. Note that some malware hides process names under legitimate Windows process names. At this stage, it is very important to avoid removing system files. After you locate the suspicious program you wish to remove, right click your mouse over its name and choose "Delete".

locate the malware file you want to remove

After removing the malware through the Autoruns application (this ensures that the malware will not run automatically on the next system startup), you should search for the malware name on your computer. Be sure to enable hidden files and folders before proceeding. If you find the filename of the malware, be sure to remove it.

searching for malware file on your computer

Reboot your computer in normal mode. Following these steps should remove any malware from your computer. Note that manual threat removal requires advanced computer skills. If you do not have these skills, leave malware removal to antivirus and anti-malware programs. These steps might not work with advanced malware infections. As always it is best to prevent infection than try to remove malware later. To keep your computer safe, install the latest operating system updates and use antivirus software.

To be sure your computer is free of malware infections, we recommend scanning it with Spyhunter for Windows.

About the author:

Tomas Meskauskas

Tomas Meskauskas - expert security researcher, professional malware analyst.

I am passionate about computer security and technology. I have an experience of over 10 years working in various companies related to computer technical issue solving and Internet security. I have been working as an author and editor for since 2010. Follow me on Twitter and LinkedIn to stay informed about the latest online security threats. Contact Tomas Meskauskas.

PCrisk security portal is brought by a company RCS LT. Joined forces of security researchers help educate computer users about the latest online security threats. More information about the company RCS LT.

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Malware activity

Global malware activity level today:

Medium threat activity

Increased attack rate of infections detected within the last 24 hours.

QR Code
Mozart virus QR code
A QR code (Quick Response Code) is a machine-readable code which stores URLs and other information. This code can be read using a camera on a smartphone or a tablet. Scan this QR code to have an easy access removal guide of Mozart virus on your mobile device.
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