Assm Virus

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*Assm is a variant of Stop/DJVU. Source of claim SH can remove it.


Assm is a file-encrypting infection that belongs to the ransomware category and is designed to extort money from its victims through blackmail. Typically, Assm encrypts a list of target files that are stored on the infected computer and demands ransom in exchange for decrypting them.

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The Assm ransomware will leave a _readme.txt file with instructions

Assm is one of the new additions to the ransomware class of malware and if you have it in your system, you most probably are unable to access a large portion of your digital files. The reason is, Assm encrypts the files of its victims by using a very complicated double key and making them completely inaccessible. Then, the malware generates a ransom message on the screen that serves as a notification of what has happened. This notification can usually be found on the monitor and in all directories of encrypted files and contains details on how the affected users can re-access their encrypted data. This may typically be achieved by transferring a certain sum of money to a given cryptocurrency wallet. The cyber crooks who demand the money usually give strict directions about how to make the transfer and in what time frame to give users a sense of pressure and fear that if they don’t pay, they will lose access to their data forever. Luckily, we have a workaround that could help you remove Assm from your system and potentially recover some of your files without paying ransom. You can find it in the removal guide below.

The Assm virus

The Assm virus is a ransomware infection that acts as a cryptovirus and secretly encrypts the files found on a computer. The Assm virus does this in order to blackmail the owners to pay ransom so as to reaccess their encrypted information.

Ransomware is one of the fastest-growing malware classes. Representatives such as Assm, Mztu, Mzqw are quite sophisticated and due to their complex encryption, valuable information can be locked – sometimes forever. Victims of such infections can be private individuals, corporations and even whole organizations. If the data that has been encrypted is of great value, most victims do not hesitate to pay the amount the hackers want in the hopes that this will allow them to access the information again. But that is not always the case. Paying ransom to the criminals behind ransomware only adds fuel to a blazing fire and encourages the crooks to continue with their blackmailing scheme.

Therefore, a more realistic and, perhaps, even more successful way to deal with such an attack is NOT to pay the ransom. Besides, you cannot rely on the very same criminals who hacked into your machine, held your data hostage and demanded money from you to really help you return your files to their previous state.

The .Assm file decryption

The .Assm file decryption is one of the possible methods to recover the data that has been encrypted by the ransomware. However, the .Assm file decryption can only be achieved if the victims apply the unique working decryption key for the applied encryption.

Assm File

Such a key is typically generated by the time the file encryption process ends but, unfortunately, it is kept in secret from the victims. Only the hackers can access it and, to send it, they ask for ransom. Due to possible flaws in coding, however, there is always a risk that the decryption key may not work even if you pay for it. Not to mention that the crooks may never send it and simply vanish with your money. So it is always better to first look for alternatives and to see what you can do by yourself to fight infections like Assm.  What we suggest is to remove the malware with the help of the instructions below and firstly try to recover your files from system or personal backups as shown in the guide.


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*Assm is a variant of Stop/DJVU. Source of claim SH can remove it.

Remove Assm Ransomware


In order to easily access the Assm removal instructions, please save this page in your browser’s bookmarks.

Restarting your computer in Safe Mode will be the next thing that is required after you bookmark the Assm removal guide. For your ease, please follow the instructions on How to reboot your PC in Safe Mode found at this URL.

When the machine restarts, type msconfig in the Windows search box at the bottom of the Start menu and hit the Enter key on your keyboard.

The following System Configuration window will open. Open the Startup tab from the tabs at the top and disable anything Assm may have added to the list by unchecking its checkmark. Click OK after you’ve finished making your configurations on the startup items.



*Assm is a variant of Stop/DJVU. Source of claim SH can remove it.

As soon as a ransomware infection starts, a slew of damaging activities kicks in. If you believe that Assm’s behavior is tied to a specific process in the Task Manager, the next step is to find and end that process.

Pressing CTRL, SHIFT, and ESC is all that you need to open the Task Manager. Once there, click on the Processes tab. Next, right-click on any process in the Processes tab and choose Open File Location if you believe it is hazardous or linked to the ransomware.


After that, use the free virus scanner provided below to scan the files associated with that process for malware:

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    It is of critical importance that any potentially harmful files detected by the scanner be eliminated as soon as they are discovered, but in order to do that, you must first end the associated process that is already running in the Task Manager.

    Ending a dangerous process requires you to right-click on it and then choose the “End Process” option from the quick menu.


    If your computer has been compromised by malware such as Assm, the Hosts file may be one of the locations where malicious changes may be observed. For this reason, we suggest that you open and carefully check your Hosts, and search for modifications under Localhost in the text to ensure that everything is in order.

    To do this, hit the Windows Key and R from the keyboard at the same time to start a Run dialog box, and copy the following command in it:

    notepad %windir%/system32/Drivers/etc/hosts

    Once you click the OK button, the following file should open on the screen:

    hosts_opt (1)

    You may contact us by commenting below if you detect any IP addresses related with virus creators, as seen in the image above. We’ll check the suspicious-looking IPs and give you advice.


    *Assm is a variant of Stop/DJVU. Source of claim SH can remove it.

    It is common for malicious files to be introduced to your computer’s Registry as a result of a ransomware infection. What’s more important is that you search the Registry for harmful entries and remove everything you suspect is connected to the infection.

    To access the Registry Editor, type Regedit into the Windows search box and hit Enter. Then, write the ransomware’s name into the Editor’s Find dialog box, which will open by pressing CTRL and F simultaneously. Then, to see whether there are any entries with that name, click on the Find Next button and start a search. The malware may be related to anything identified in the search results, so it’s best to remove that.

    Attention! If an untrained user doesn’t know which files to delete from the registry, they might do serious harm to the system. In such a case, a professional removal tool should be used to eliminate any hazards and harmful files from the system and the registry.

    After you are certain that the Registry is clean, you can close it and go to the Windows search bar to perform some more manual search for malicious entries in these five locations:

    1. %AppData%
    2. %LocalAppData%
    3. %ProgramData%
    4. %WinDir%
    5. %Temp%

    Use the search field to type each of the following lines (including the percent sign) and open them by clicking Enter to check whether any new files and folders have been added there.

    If you see any suspicious, don’t hesitate to remove it. When you open Temp, select and delete all the temporary files stored there. This will also remove any temporary files that the ransomware may have created.


    How to Decrypt Assm files

    When it comes to decrypting Ransomware encrypted data, victims may need to employ a variety of tools and approaches. An important thing to make sure is that you know the variant of the ransomware that has locked your data before following the instructions below. To figure this out, look at the file extensions that have been added to the encrypted files.

    New Djvu Ransomware

    As of the time of this writing, STOP Djvu ransomware is the latest Djvu ransomware variant that is actively trying to infect computers all around the world. The end of all encoded files by this ransomware variant come with the .Assm suffix added to them. Currently, the only chance to decode STOP Djvu-encoded files is if those files have been encrypted with an offline key. To help you decrypt your data, below we have provided a link for a decryptor tool that may be of use:

    Open the URL and click the Download button in the top right corner of the window to save the STOPDjvu.exe file to your computer.

    To open the file, you need to select Run as an administrator and then hit the Yes button. The decrypting process may begin once you’ve read the license agreement and the brief instructions for use. Clicking the Decrypt button will start the process. This decryptor does not support decryption of files encrypted with unknown offline keys or online encryption, so please be aware of this before using it.

    Assm and other malware may be removed from your computer using a professional anti-virus tool or a powerful online virus scanner. Please don’t hesitate to contact us if you have any questions or concerns while you travel.


    About the author


    Lidia Howler

    Lidia is a web content creator with years of experience in the cyber-security sector. She helps readers with articles on malware removal and online security. Her strive for simplicity and well-researched information provides users with easy-to-follow It-related tips and step-by-step tutorials.

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