How to uninstall Mount Locker ransomware?

Also Known As: Mount Locker virus
Distribution: Moderate
Damage level: Severe

Mount Locker ransomware removal instructions

What is Mount Locker?

Mount Locker encrypts victim's files, renames them and creates the "RecoveryManual.html" ransom note in folders that contain encrypted files. It renames files by adding "ReadManual" to their filenames and appending a string of random characters as their new extension. For instance, it renames a file named "1.jpg" to "1.jpg.ReadManual.C77BFF8C", "2.jpg" to "2.jpg.ReadManual.C77BFF8C", and so on.

As written in the "RecoveryManual.html" HTML file (ransom note), all victim's files have been encrypted and copied to some private server controlled by Mount Locker's developers. Details like price of the decryption software and how to pay for it can be received by contacting cyber criminals via the provided Tor website. Additionally, that website can be used to upload 2-3 files for a free decryption. Typically, ransomware encrypts files with a strong encryption algorithm and cyber criminals behind it are the only ones who have the right decryption software and/or key. Unfortunately, there are no third party decryption tools that could decrypt files encrypted by Mount Locker as well, at least not at the moment. In such cases the only way to recover files for free is to restore them from a backup. It is strongly recommended not to pay cyber criminals for decryption tools that they promise to send after a payment, in most cases victims who pay a ransom get scammed. In other words, cyber criminals do not send any decryption tools even if they get paid. It is worthwhile to mention that it is possible to prevent installed ransomware from encrypting files further by uninstalling it from the infected computer. Although, already encrypted files remain encrypted even after its uninstallation.

Screenshot of a message encouraging users to pay a ransom to decrypt their compromised data:

Mount Locker decrypt instructions (RecoveryManual.html)

Some more examples of ransomware are Arrow, Exorcist 2.0 and Txt (Xorist). In most cases malware of this type encrypts files and provides victims with some ransom note. Two main and most common differences are size of a ransom and cryptographic algorithm (symmetric or asymmetric) that is used for data encryption. Typically, victims cannot decrypt files without the right tools and cyber criminals behind ransomware are the only ones who can provide those tools. It is possible to decrypt files without their tools only when ransomware has some bugs, flaws. Unluckily, it is not a common case. As mentioned in the previous paragraph, most of the times victims can avoid data loss for free by restoring fils from a backup. Therefore, it is recommended to always have data backed up and store it on remote server like Cloud and/or unplugged storage device.

How did ransomware infect my computer?

Usually, malware gets installed through Trojans, malspam campaigns, untrustworthy file and/or software download sources, software 'cracking' tools and fake, unofficial software updating tools. Trojans are malicious programs that can infect computers only when they are installed on them. There are certain Trojans that can install other programs of this kind, in other words, to cause chain infections. Another way to distribute malicious programs is by sending emails that have malicious files or website links in them. When recipients open the attached file (or a file downloaded via website link), they cause installation of malware. In most cases cyber criminals send emails that contain malicious Microsoft Office, PDF documents, executable files (like .exe), archive files like RAR, ZIP, JavaScript files. Files that are available for download via unreliable sources can be designed to install malware too. Usually, such files are distributed by using Peer-to-Peer networks like torrent clients, eMule, free file hosting websites, third party downloaders, freeware download pages, unofficial websites, etc. Unofficial activation ('cracking') tools are illegal programs that can be used to activate licensed software for free. Although, it is common that such tools are designed to infect computers with malware. Unofficial updating tools can be designed to infect systems by installing malware instead of updates, fixes for installed software, or by exploiting bugs, flaws, of some outdated software.

Threat Summary:
Name Mount Locker virus
Threat Type Ransomware, Crypto Virus, Files locker
Encrypted Files Extension Random extension (like .C77BFF8C)
Ransom Demanding Message RecoveryManual.html
Cyber Criminal Contact Chat on Tor website
Detection Names Avast (Win32:Malware-gen), BitDefender (Gen:Variant.Razy.750154), ESET-NOD32 (Win32/Filecoder.ODH), Kaspersky (Trojan.Win32.Zudochka.evg), Full List Of Detections (VirusTotal)
Symptoms Cannot open files stored on your computer, previously functional files now have a different extension (for example, my.docx.locked). A ransom demand message is displayed on your desktop. Cyber criminals demand payment of a ransom (usually in bitcoins) to unlock your files.
Distribution methods Infected email attachments (macros), torrent websites, malicious ads.
Damage All files are encrypted and cannot be opened without paying a ransom. Additional password-stealing trojans and malware infections can be installed together with a ransomware infection.
Malware Removal (Windows)

To eliminate possible malware infections, scan your computer with legitimate antivirus software. Our security researchers recommend using Malwarebytes.
▼ Download Malwarebytes
To use full-featured product, you have to purchase a license for Malwarebytes. 14 days free trial available.

How to protect yourself from ransomware infections?

Software should not be downloaded (or installed) through third party downloaders (or installers), from unofficial sites and other sources that are mentioned in the previous paragraph. The safest way to download files and programs is by using official websites and direct links. Irrelevant emails that contain attachments, website links and are received from unknown, suspicious addresses should be analyzed. It is common that emails of this kind are used to proliferate malicious software. Installed programs have to be activated and/or updated with tools or functions that are provided by their official developers. Third party, unofficial tools should never be used for this purpose. Moreover, it is not legal to activate licensed software with such tools. Operating system should be regularly scanned for threats with a reputable antivirus or anti-spyware suite. It is advised to make sure that installed security suite is always up to date. If your computer is already infected with Mount Locker, we recommend running a scan with Malwarebytes for Windows to automatically eliminate this ransomware.

Text presented in Mount Locker ransomware's "RecoveryManual.html" file:

Your ClientId:
All your important files have been encrypted and copied to our private servers!
But keep calm! There is a solution for your problem!
For some money reward we can decrypt all your encrypted files.
Also we will delete all your private data from our servers.
To prove that we are able to decrypt your files we give you the ability to decrypt 2-3 files for free.


So what is you next step ? Contact Us! Contact us for price and get decryption software.
hxxp://6mlzahkc7vejytppbqhqjou4ipftgs3gizof2x4zklblliayhsqb3wad.onion/?cid= a7fb00164f192687eda014cd1bde83252ad9ac2fdc89a26b1294b11918d6fe33
* Note that you need installed Tor Browser to open this kind of links.


Follow the instructions to install/run Tor Browser:
1. Go to Tor Project using your default browser.
2. Click "Download Tor Browser", choose version depends on you operation system, usually it is Windows. Download and install it
3. After installation you will see new folder on your desktop: "Tor Browser". Open this folder and run "Start Tor Browser" link.
4. Using Tor Browser go to hxxp://6mlzahkc7vejytppbqhqjou4ipftgs3gizof2x4zklblliayhsqb3wad.onion/?cid= a7fb00164f192687eda014cd1bde83252ad9ac2fdc89a26b1294b11918d6fe33
5. Carefully copy your client id from this document and paste it into Authorization window in opened page. Click 'OK'.
6. After that you will see a special chat web application to comminicate with us.
7. NB! Please be patient - sometimes our support team can be away from the keyboard but they will answear you as soon as possible! Time is Money! Contact us as soon as possible.
We won't store you decryption key forever!

Screenshot of of the Tor website:

mount locker tor website

Screenshot of files encrypted by Mount Locker (random extension):

Files encrypted by Mount Locker ransomware (random extension)

Another variant of ransom note delivered by Mount Locker ransomware:

Mount Locker ransomware ransom note (RecoveryManual.html)

Text presented within:

Your ClientId:
All your important files have been encrypted!
Your files are safe! Only encrypted.


No software available on internet can help you. We are the only ones able to
solve your problem.

You can send us 2-3 files and we will decrypt it for free
to prove we are able to give your files back.

Also we gathered highly confidential/personal data from your network. These data are currently stored on
a private server. This server will be immediately destroyed after your payment.
If you won't pay, we will release your data to public or reseller.
So you can expect your data to be published or improperly used in the near future.
In this case you will face all legal and reputational consequences of the leak.
We only desire to get a ransom and we don't aim to damage your reputation or destroy
your business.

Contact us to discuss your next step.

hxxp://soxbhgx23tabwh2k447b2tljcu5tktdc2elmi2ls7huzntrhknygxsqd.onion/?cid= aa0a8ea69e22c4a789b451ab4101d8502a83a01cc7b902cb897014bba965b433
* Note that this server is only available via Tor browser only

Follow the instructions to open the link:
1. Type the addres "hxxps://" in your Internet browser. It opens the Tor site.
2. Press "Download Tor", then press "Download Tor Browser Bundle", install and run it.
3. Now you have Tor browser. In the Tor Browser open "hxxp://soxbhgx23tabwh2k447b2tljcu5tktdc2elmi2ls7huzntrhknygxsqd.onion/?cid= aa0a8ea69e22c4a789b451ab4101d8502a83a01cc7b902cb897014bba965b433".
4. Start a chat and follow the further instructions. (Password field should be empty for the first login).

If you can`t use the above link, use the email:
Please note, sometimes our support is away from keyboard, but we will reply shortly.
Kindly advise you to contact us as soon as possible.

Mount Locker ransomware removal:

Instant automatic malware removal: Manual threat removal might be a lengthy and complicated process that requires advanced computer skills. Malwarebytes is a professional automatic malware removal tool that is recommended to get rid of malware. Download it by clicking the button below:
▼ DOWNLOAD Malwarebytes By downloading any software listed on this website you agree to our Privacy Policy and Terms of Use. To use full-featured product, you have to purchase a license for Malwarebytes. 14 days free trial available.

Quick menu:

Isolating the infected device:

Some ransomware-type infections are designed to encrypt files within external storage devices, infect them, and even spread throughout the entire local network. For this reason, it is very important to isolate the infected device (computer) as soon as possible.

Step 1: Disconnect from the internet.

The easiest way to disconnect a computer from the internet is to unplug the Ethernet cable from the motherboard, however, some devices are connected via a wireless network and for some users (especially those who are not particularly tech-savvy), disconnecting cables may seem troublesome. Therefore, you can also disconnect the system manually via Control Panel:

Navigate to the "Control Panel", click the search bar in the upper-right corner of the screen, enter "Network and Sharing Center" and select search result: Disconnecting computer from the Internet (step 1)

Click the "Change adapter settings" option in the upper-left corner of the window: Disconnecting computer from the Internet (step 2)

Right-click on each connection point and select "Disable". Once disabled, the system will no longer be connected to the internet. To re-enable the connection points, simply right-click again and select "Enable". Disconnecting computer from the Internet (step 3)

Step 2: Unplug all storage devices.

As mentioned above, ransomware might encrypt data and infiltrate all storage devices that are connected to the computer. For this reason, all external storage devices (flash drives, portable hard drives, etc.) should be disconnected immediately, however, we strongly advise you to eject each device before disconnecting to prevent data corruption:

Navigate to "My Computer", right-click on each connected device and select "Eject": Ejecting external storage devices

Step 3: Log-out of cloud storage accounts.

Some ransomware-type might be able to hijack software that handles data stored within "the Cloud". Therefore, the data could be corrupted/encrypted. For this reason, you should log-out of all cloud storage accounts within browsers and other related software. You should also consider temporarily uninstalling the cloud-management software until the infection is completely removed.

Identify the ransomware infection:

To properly handle an infection, one must first identify it. Some ransomware infections use ransom-demand messages as an introduction (see the WALDO ransomware text file below).

Identify ransomware-type infection (step 1)

This, however, is rare. In most cases, ransomware infections deliver more direct messages simply stating that data is encrypted and that victims must pay some sort of ransom. Note that ransomware-type infections typically generate messages with different file names (for example, "_readme.txt", "READ-ME.txt", "DECRYPTION_INSTRUCTIONS.txt", "DECRYPT_FILES.html", etc.). Therefore, using the name of a ransom message may seem like a good way to identify the infection. The problem is that most of these names are generic and some infections use the same names, even though the delivered messages are different and the infections themselves are unrelated. Therefore, using the message filename alone can be ineffective and even lead to permanent data loss (for example, by attempting to decrypt data using tools designed for different ransomware infections, users are likely to end up permanently damaging files and decryption will no longer be possible even with the correct tool).

Another way to identify a ransomware infection is to check the file extension, which is appended to each encrypted file. Ransomware infections are often named by the extensions they append (see files encrypted by Qewe ransomware below).

Identify ransomware-type infection (step 2)

This method is only effective, however, when the appended extension is unique - many ransomware infections append a generic extension (for example, ".encrypted", ".enc", ".crypted", ".locked", etc.). In these cases, identifying ransomware by its appended extension becomes impossible.

One of the easiest and quickest ways to identify a ransomware infection is to use the ID Ransomware website. This service supports most existing ransomware infections. Victims simply upload a ransom message and/or one encrypted file (we advise you to upload both if possible).

Identify ransomware-type infection (step 3)

The ransomware will be identified within seconds and you will be provided with various details, such as the name of the malware family to which the infection belongs, whether it is decryptable, and so on.

Example 1 (Qewe [Stop/Djvu] ransomware):

Identify ransomware-type infection (step 4)

Example 2 (.iso [Phobos] ransomware):

Identify ransomware-type infection (step 5)

If your data happens to be encrypted by a ransomware that is not supported by ID Ransomware, you can always try searching the internet by using certain keywords (for example, ransom message title, file extension, provided contact emails, cryptowallet addresses, etc.).

Search for ransomware decryption tools:

Encryption algorithms used by most ransomware-type infections are extremely sophisticated and, if the encryption is performed properly, only the developer is capable of restoring data. This is because decryption requires a specific key, which is generated during the encryption. Restoring data without the key is impossible. In most cases, cyber criminals store keys on a remote server, rather than using the infected machine as a host. Dharma (CrySis), Phobos, and other families of high-end ransomware infections are virtually flawless, and thus restoring data encrypted without the developers' involvement is simply impossible. Despite this, there are dozens of ransomware-type infections that are poorly developed and contain a number of flaws (for example, the use of identical encryption/decryption keys for each victim, keys stored locally, etc.). Therefore, always check for available decryption tools for any ransomware that infiltrates your computer.

Finding the correct decryption tool on the internet can be very frustrating. For this reason, we recommend that you use the No More Ransom Project and this is where identifying the ransomware infection is useful. The No More Ransom Project website contains a "Decryption Tools" section with a search bar. Enter the name of the identified ransomware, and all available decryptors (if there are any) will be listed.

Searching for ransomware decryption tools in website

Restore files with data recovery tools:

Depending on the situation (quality of ransomware infection, type of encryption algorithm used, etc.), restoring data with certain third-party tools might be possible. Therefore, we advise you to use EaseUS Data Recovery Wizard Pro. This tool supports over a thousand data types (graphics, video, audio, documents, etc.) and it is very intuitive (little knowledge is necessary to recover data).

▼ Download
EaseUS Data Recovery Wizard Pro

By downloading any software listed on this website you agree to our Privacy Policy and Terms of Use. Trial version of EaseUS Data Recovery Wizard Pro is capable of scanning drives and listing recoverable files - to restore them, you must purchase a license.

Step 1: Perform a scan.

Hover your mouse over the partition you wish to scan and select "Scan". You can also select a specific folder, or click shortcut icons to scan the Desktop or Recycle Bin: Scanning the storage drive with EaseUS Data Recovery Wizard PRO (step 1)

Wait for EaseUS Data Recovery Wizard Pro to complete the scan. The scanning duration depends on the volume of files (both in quantity and size) that you are scanning (for example, several hundreds gigabytes could take over an hour to scan). Therefore, be patient during the scanning process. We also advise against modifying or deleting existing files, since this might interfere with the scan. If you add additional data (for example, downloading files/content) while scanning, this will prolong the process: Scanning the storage drive with EaseUS Data Recovery Wizard PRO (step 2)

Step 2: Recover data.

Once the process is complete, select the folders/files you wish to restore and simply click "Recover". Note that some free space on your storage drive is necessary to restore data. Note also that the trial version of EaseUS Data Recovery Wizard Pro is only capable of scanning drives and listing recoverable files - to restore them, you must purchase a license: Recovering data with EaseUS Data Recovery Wizard Pro

Step 3: Save the scan session (optional).

We recommend that you save the scanning session once you have completed recovery, in case you decide to recover additional files later. Simply click the "Save Scan Session" icon in the upper-right corner of the screen and choose the location for the file to be saved. This will save a lot of time, since you will not need to re-scan the storage drive the next time you wish to restore something. Bear in mind, however, that data removed after the scanning session has finished will not be listed: Saving scan session in EaseUS Data Recovery Wizard Pro

Create data backups:

Proper file management and creating backups is essential for data security. Therefore, always be very careful and think ahead.

Partition management: We recommend that you store your data in multiple partitions and avoid storing important files within the partition that contains the entire operating system. If you fall into a situation whereby you cannot boot the system and are forced to format the disk on which the operating system is installed (in most cases, this is where malware infections hide), you will lose all data stored within that drive. This is the advantage of having multiple partitions: if you have the entire storage device assigned to a single partition, you will be forced to delete everything, however, creating multiple partitions and allocating the data properly allows you to prevent such problems. You can easily format a single partition without affecting the others - therefore, one will be cleaned and the others will remain untouched, and your data will be saved. Managing partitions is quite simple and you can find all necessary information on Microsoft's documentation web page.

Data backups: The most reliable backup method is to use an external storage device and keep it unplugged. Copy your data to an external hard drive, flash (thumb) drive, SSD, HDD, or any other storage device, unplug it and store it in a dry place away from sun and extreme temperatures. This method is, however, quite inefficient, since data backups and updates need to be made regularly. You can also use a cloud service or remote server. Here, an internet connection is required and there is always the chance of a security breach. Therefore, you should consider using an application to create data backups locally.

▼ Download
EaseUS Todo Backup

By downloading any software listed on this website you agree to our Privacy Policy and Terms of Use. To use full-featured product, you have to purchase a license for EaseUS Todo Backup. 30 days free trial available.

We recommend using the EaseUS Todo Backup application. The "Home" edition of EaseUS Todo Backup is usually more than adequate for regular users, however, the "Business" edition is more suitable for companies and large computer networks. The EaseUS Todo Backup application provides extensive data protection features. You can easily create backups, and encrypt and compress them for enhanced protection and storage saving purposes. It also allows you to set backup schedules, create bootable devices, and restore the system if a crash occurs. You can easily choose where to store the created backup: locally; uploaded to an external drive; FTP; cloud storage, or elsewhere. In summary, EaseUS Todo Backup is an all-in-one tool, which provides all features required to properly backup your data.

Creating a data backup:

The backup process is virtually identical regardless of the item (file, partition, entire system) you wish to backup. Taking the File Backup feature as an example:

Step 1: Choose which item to backup.

Click on the "Menu" icon in the upper-left corner of the screen to reveal the menu and select "File Backup": Creating data backups with EaseUS Todo Backup tool (step 1)

Select the files you want to backup. You can also enter a name and description of the backup that will be created: Creating data backups with EaseUS Todo Backup tool (step 2)

Step 2: Change the default settings.

The EaseUS Todo Backup application provides a variety of additional options that can be added/modified while creating the backup. For example, you can encrypt data (add a password), select the compression rate (how much the backup should be compressed), performance (how many system resources should be allocated), add an email notification (you receive an email once the process is complete) and so on.

To open the options window, click the "Backup options" button in the lower-left corner of the screen: Creating data backups with EaseUS Todo Backup tool (step 3)

Select the settings you want to change and click "Save". You can also reset your changes by clicking "Reset to initial settings": Creating data backups with EaseUS Todo Backup tool (step 4)

Step 3: Select the backup destination.

As mentioned above, EaseUS Todo Backup allows you to choose where backups are saved - locally or externally.

Click the "Browse..." button and select the location you want the backup to be saved: Creating data backups with EaseUS Todo Backup tool (step 5)

Step 4: Safety measures and process completion.

Depending on the location you have chosen, there are a number of measures you should or should not take. If you are uploading to an internet-connected location (for example, Cloud storage, FTP, etc.), be sure to maintain your internet connection, otherwise you will have to start again. The same applies to external storage devices - do not unplug them until the process is complete.

The progress bar displays estimated time remaining until completion. Large backups (hundreds of gigabytes) can take hours to create (depending on storage device speed, internet connection, etc.). Therefore, the application also allows you to optionally choose what the system should do (shut down, sleep or hibernate) once the process has finished: Creating data backups with EaseUS Todo Backup tool (step 6)

The best way to avoid damage from ransomware infections is to maintain regular up-to-date backups.

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.

Our malware removal guides are free. However, if you want to support us you can send us a donation.

Malware activity

Global malware activity level today:

Medium threat activity

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

QR Code
Mount Locker 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 Mount Locker virus on your mobile device.
We Recommend:

Get rid of Windows malware infections today:

Download Malwarebytes

Platform: Windows

Editors' Rating for Malwarebytes:
Editors ratingOutstanding!

[Back to Top]

To use full-featured product, you have to purchase a license for Malwarebytes. 14 days free trial available.