Diablo6 ransomware virus: what it is and how to remove it

Diablo6 virus operates as the latest version of the notorious Locky ransomware . It encodes data on victim's computer using a combination of RSA-2048 and AES-128 cryptography ciphers and attaches .diablo6 file extension to every file.

Facts checked October 6, 2026. Removal steps tested on Windows 11 (26H2) and checked against Microsoft's and the browser makers' current documentation. Sections marked as our earlier report are the original text: they describe the threat as it was then and have not been reviewed since. The 2026 status, the removal steps and the questions are current.

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Diablo6 ransomware virus: screenshot
Diablo6 ransomware virus as our 2017 report showed it.

Diablo6 ransomware virus: summary

Detection namesNo Microsoft detection name is known
Ransom noteNot recorded in our earlier report
ContactNot recorded in our earlier report
Encrypted file extension.docm
DecryptorNo free decryptor is known for this variant; check No More Ransom (nomoreransom.org) for updates
DistributionNot recorded in the old report
Removal

Scan the PC with security software to find and remove the malware and anything installed with it. Fortect scans Windows for malware and repairs the system files and settings it damaged.

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Show 9 more facts
DamageNot recorded in the old report
NameDiablo6 ransomware virus
TypeFile-encrypting ransomware
SymptomsFiles renamed with a new extension
Evidence5 write-ups by security sites; details still limited
Encrypted files.docm
Free decryptorNo free decryptor is known (checked 6 October 2026)
First seen14 August 2017
Facts checked6 October 2026
  • File extension: .docm

From our report of Aug 2017 · not reviewed since

More from our earlier report on Diablo6 ransomware virus

  • All of your files are encrypted with RSA-2048 and AES-128 ciphers.

How Diablo6 ransomware virus behaves

From our report of Aug 2017 · not reviewed since

Diablo6 virus rolls out its another malspam campaign

Diablo6 virus operates as the latest version of the notorious Locky ransomware .

It encodes data on victim's computer using a combination of RSA-2048 and AES-128 cryptography ciphers and attaches .diablo6 file extension to every file. Once the procedure is finished, the data becomes unreadable.

Finally, the malware creates a ransom note called diablo6.htm and replaces desktop's background with a diablo6.bmp image. Note that this malicious crypto-ransomware is not related to Diablo game in any way even though the authors seem to be its fans.

The virtual threat arrives in the form of an .ZIP email attachment that contains a VBS downloader. It hen connects to one of the malicious domains, downloads and executes the Locky Diablo6 ransomware.

During the encryption, Locky virus renames each file by swapping its original name with a set of characters. The new file name is created using such pattern: [8 first characters of the victim's ID]- -next 4 characters of the ID]-[4 random characters]-[12 random characters].diablo6.

Once data encryption is complete, the virus immediately launches the ransom note using victim's default browser. The ransom note starts with a straightforward explanation of what happened:

The virus urges the victim to install Tor browser and visit a provided .onion website to access Locky Decryptor page. The price of Diablo6 decryption tool is 0.5 Bitcoin, which is approximately 1642 US dollars.

At the moment, there are no ways to decrypt files encrypted by this dangerous virus. Speaking of its sophistication, it is very similar to Cerber. Despite that, it doesn't mean that you have to pay the ransom.

Paying the ransom doesn't guarantee efficient data recovery, either. The possibility of getting scammed is high, besides, obeying extortionists' demands simply motivates them to create even more malware .

If your files were corrupted by the latest Locky ransomware variant, remove Diablo6 using or . Your computer must be in a Safe Mode with Networking in order to complete the removal successfully.

After completing Diablo6 removal, use your data backup to restore damaged files. Many people do not have data backups, so if you are one of them, it might be impossible to restore your records.

Try to think of ways where you could find intact data copies (USBs, CDs, email or elsewhere) and transfer them to your computer after deleting the virus. You can find alternative data recovery options below the article.

Diablo6 ransomware virus: screenshot
Diablo6 ransomware virus in our 2017 report.
Diablo6 ransomware virus: locky
Diablo6 ransomware virus in our 2017 report.

From our report of Aug 2017 · not reviewed since

The ransomware now switches to .docm files

The Locky Diablo6 variant is distributed via malspam campaign that delivers emails with subject lines similar to E (random numbers).docx.

The malware-laden email contains an attachment that is named E (random numbers).zip. The message body lacks any explanation and contains three words only:

The ZIP file contains a VBS script that uses victim's Internet connection to download malware from a compromised domain. The script may include several domains to connect to in case one of them won't respond.

The script is designed to download Diablo6 ransomware to %TEMP% folder and launch it immediately. Note that the dates of the report might be earlier. It only implies that Locky authors have diligently working on the campaign.

The current analysis reveals that the threat now diverts to its old habit of fishing for users via .docm files. As its predecessor variation, which attempted to persuade unsuspecting users to open the infected .doc file and enable macros, Diablo6 functions the same. However, this case it employs .docm file as bait. This time, there is no message content except the subject line, the infected .docm is disguised within

This time, there is no message content except the subject line, the infected .docm is disguised within IMG_[4 digits].pdf. If you enable the macros of the file, you will face the severe consequences of the malware.

The perpetrators indeed polish their malware distribution campaigns which now looks more sophisticated. However, despite how elaborate such emails may look, note that you should not give in to curiosity and not to open any attachments received from unknown recipients.

On the other hand, if your friend gets infected with a computer worm, he or she might send the corrupted link unwillingly. In that case, contact them directly. If you scan the file, note that malware authors apply various "cloaking" techniques to prevent the anti-virus from detecting the infection.

To protect yourself from Locky Diablo, follow the provided tips:

According to experts, the first wave of ransomware hit Germany and US. If you are a German-speaking PC user, consider visiting DieViren.de for help .

  • Never open email attachments that were sent to you by someone you don't know. If the message looks vague or shady, never click on links or files attached to it;
  • Secure your computer system with anti-malware software. Keep it running at all times;
  • Dedicate some time to create a data backup. It is the only efficient tool that helps to restore crippled files after a ransomware attack;
  • Enable automatic software updates to always have the latest and most secure software versions on your PC.

How to remove Diablo6 ransomware virus

Tools you'll need

All of these are free except where noted. Download them on a clean device if the infected PC is offline.

  • A USB stick: to keep the ransom note, two or three encrypted files and screenshots off the infected PC.
  • Microsoft Defender Offline: built into Windows 11 and Windows 10; scans before Windows starts, so running malware cannot hide.
  • Microsoft Safety Scanner: a second, portable scanner with current signatures; each download works for 10 days.
  • ID Ransomware: identifies the family from the note and one encrypted file and says whether a decryptor exists.
  • No More Ransom: the free decryptors from police and security companies; check it again every few months.
  • Fortect (optional): scans Windows for malware and repairs the system files and settings it damaged. The free scan is in the box above.

How to remove Diablo6 ransomware virus and get your files back

Work in this order.

Disconnecting comes first, removal comes before any restore, and nothing here asks you to contact the attackers.

  1. Step 1: Disconnect the PC and unplug backup drives

    Diablo6 ransomware virus encrypts everything it can reach, including drives and shares you connect later. Cut the network first: cable out, or Wi-Fi off from the taskbar.

    Then unplug every USB stick and backup disk and pause cloud sync, so the encrypted versions do not replace your online copies. Do not reconnect any of them until the ransomware is removed from the Windows 11 or Windows 10 PC.

    Windows 11 quick settings with Wi-Fi turned off
    Windows 11: turn off Wi-Fi to take the PC offline.

    Full procedure with screenshots: Ransomware: first steps, finding a decryptor and recovering files

  2. Step 2: Save the ransom note and identify the family

    Find the ransom note, usually a .txt, .html or .hta file in every folder or on the desktop, and copy it with one or two encrypted files to a USB stick.

    From another device, upload them to ID Ransomware or No More Ransom's Crypto Sheriff, which name the family from the note and the file extension. Write down the contact address and your personal ID from the note for the report.

    Warning: Never contact the attackers from the infected Windows 11 or Windows 10 PC.

    A ransom note text file next to encrypted files in File Explorer
    Windows 11: the ransom note and encrypted files to copy for identification.

    Full procedure with screenshots: Ransomware: first steps, finding a decryptor and recovering files

  3. Step 3: Check for a free decryptor

    For Diablo6 ransomware virus, no free decryptor is known (checked 6 October 2026). Search the family name in the No More Ransom decryption tools list and in the free decryptors of Emsisoft, Avast and Kaspersky, because new tools appear years after an attack.

    Important: Keep the encrypted files even if nothing works today, and do not pay before every free option is ruled out: payment does not guarantee a working key.

    Decryptors run on Windows 11 and Windows 10, but only after the ransomware itself is removed.

    Full procedure with screenshots: Ransomware: first steps, finding a decryptor and recovering files

  4. Step 4: Remove the ransomware before you restore or decrypt

    Restoring or decrypting files while Diablo6 ransomware virus still runs lets it encrypt them again. Run a Full scan in Windows Security > Virus & threat protection > Scan options, then the Microsoft Defender Antivirus (offline scan).

    If the ransomware blocks Windows Security, start Safe Mode with Networking and scan from there. Some families install a password stealer as well, so let both scans finish on Windows 11 or Windows 10.

    Windows Security Scan options with Microsoft Defender Antivirus offline scan selected
    Windows 11: Windows Security > Virus & threat protection > Scan options.

    Full procedure with screenshots: Run a Microsoft Defender Offline scan

  5. Step 5: Look for shadow copies of the files

    Open Command Prompt as administrator and run vssadmin list shadows. If it lists copies dated before the attack, right-click a folder with encrypted files in File Explorer, choose Properties > Previous Versions, and open or restore a version from before that date.

    ShadowExplorer, a free tool, shows the same copies when the tab is empty or hidden. Most current families delete shadow copies, so an empty list is normal, but the check takes two minutes on Windows 11 or Windows 10.

    Command Prompt running vssadmin list shadows
    Windows 11: vssadmin list shadows shows whether shadow copies exist.

    Full procedure with screenshots: Ransomware: first steps, finding a decryptor and recovering files

  6. Step 6: Restore the files from a backup or recover deleted originals

    Restore from an external backup, File History or OneDrive's version history, choosing a date before the attack. Connect the backup drive only after the scans are clean, or the ransomware encrypts it too.

    If there is no backup, file recovery software can sometimes find the deleted originals, because some ransomware writes an encrypted copy and deletes the original file.

    Stop writing to the drive and try recovery on Windows 11 or Windows 10 before new files overwrite the space.

    Full procedure with screenshots: Recover deleted files (Recycle Bin, backups, OneDrive) On uGetFix

Instructions for each browser and system

The detailed steps for every browser and system this guide covers. Open the one you use.

Manual removal using Safe Mode

Important! →
Manual removal guide might be too complicated for regular computer users. It requires advanced IT knowledge to be performed correctly (if vital system files are removed or damaged, it might result in full Windows compromise), and it also might take hours to complete. Therefore, we highly advise using the automatic method provided above instead.

Step 1. Access Safe Mode with Networking

Manual malware removal should be best performed in the Safe Mode environment.

Windows 7 / Vista / XP

  1. Click Start > Shutdown > Restart > OK.
  2. When your computer becomes active, start pressing F8 button (if that does not work, try F2, F12, Del, etc. - it all depends on your motherboard model) multiple times until you see the Advanced Boot Options window.
  3. Select Safe Mode with Networking from the list.Windows 7/XP

Windows 10 / Windows 8

  1. Right-click on Start button and select Settings.
    Settings
  2. Scroll down to pick Update & Security.
    Update and security
  3. On the left side of the window, pick Recovery.
  4. Now scroll down to find Advanced Startup section.
  5. Click Restart now.
    Reboot
  6. Select Troubleshoot.Choose an option
  7. Go to Advanced options.Advanced options
  8. Select Startup Settings.Startup settings
  9. Press Restart.
  10. Now press 5 or click 5) Enable Safe Mode with Networking.Enable safe mode

Step 2. Shut down suspicious processes

Windows Task Manager is a useful tool that shows all the processes running in the background. If malware is running a process, you need to shut it down:

  1. Press Ctrl + Shift + Esc on your keyboard to open Windows Task Manager.
  2. Click on More details.
    Open task manager
  3. Scroll down to Background processes section, and look for anything suspicious.
  4. Right-click and select Open file location.
    Open file location
  5. Go back to the process, right-click and pick End Task.
    End task
  6. Delete the contents of the malicious folder.

Step 3. Check program Startup

  1. Press Ctrl + Shift + Esc on your keyboard to open Windows Task Manager.
  2. Go to Startup tab.
  3. Right-click on the suspicious program and pick Disable.
    Startup

Step 4. Delete virus files

Malware-related files can be found in various places within your computer. Here are instructions that could help you find them:

  1. Type in Disk Cleanup in Windows search and press Enter.
    Disk cleanup
  2. Select the drive you want to clean (C: is your main drive by default and is likely to be the one that has malicious files in).
  3. Scroll through the Files to delete list and select the following: Temporary Internet Files
    Downloads
    Recycle Bin
    Temporary files
  4. Pick Clean up system files.
    Delete temp files
  5. You can also look for other malicious files hidden in the following folders (type these entries in Windows Search and press Enter): %AppData%
    %LocalAppData%
    %ProgramData%
    %WinDir%

After you are finished, reboot the PC in normal mode.

From our report of Aug 2017 · not reviewed since

Eliminate Locky Diablo6 virus

Your computer will be secure only if you remove Diablo6 virus professionally.

Let us remind you that you are dealing with one of the most destructive ransomware-type programs which might be perceived inferior to another ransomware – Cerber.

It continuously changes its attack vectors and its own structure, so better assign Diablo6 removal for a professional anti-malware program developed by malware analysts. Do not forget that you must update the security program to the latest version of it in order to eliminate the ransomware fully. After deleting the virus, start testing available data decryption techniques.

[GI=method-1] Steps to remove Diablo6 ransomware virus:

[GI=method-2]If the method 1 didn't help you to remove the ransomware, try the second option.

The tool might fail to restore all of your files - be prepared for it.

Second method:. Try to recover some files using Previous Versions

This method works only if you created a system restore point in the past. To recover individual files, carry out the given instructions.

Third method: Try ShadowExplorer

ShadowExplorer is a tool that helps to detect available Volume Shadow Copies and use them for data recovery. If the virus failed to delete VSS backup, it will help you to recreate your files.

We do not recommend buying Locky Decryptor because it is a tool created by cybercriminals. It can contain spying tools, banking trojans or other forms of malware. Besides, it might fail to restore your files. Although an official decryption tool wasn't created by malware analysts yet, we do not recommend paying the ransom to cybercriminals.

  • Reboot your computer in Safe Mode with Networking;
  • Download or update anti-malware software;
  • Run a full system scan to find malicious files and eliminate them all at once.

Report it and recover your files

Report it

Report the attack even if you do not expect the files back: insurers and banks ask for the report number, and police use the contacts in the note to link cases.

United States
FBI IC3 · FTC ReportFraud

Give the victim ID, the note and the date the files were encrypted. A business that holds personal data may also have to notify its data protection authority, in the EU within 72 hours.

Protect the files you restore

Restore only after the scans are clean and the PC no longer shows files that end in .docm and no longer open; otherwise the restored copies can be damaged again.

Then build a backup that survives the next infection:

  • one copy in the cloud with version history
  • one on an external drive that is disconnected between backups
  • the working copy on the PC

Version history matters because a backup that syncs damaged files overwrites the good ones.

How to do this with the tools built into Windows: the 3-2-1 backup rule on Windows.

Choose a proper web browser and improve your safety with a VPN tool

Online spying has got momentum in recent years and people are getting more and more interested in how to protect their privacy online.

One of the basic means to add a layer of security - choose the most private and secure web browser. Although web browsers can't grant full privacy protection and security, some of them are much better at sandboxing, HTTPS upgrading, active content blocking, tracking blocking, phishing protection, and similar privacy-oriented features.

However, if you want true anonymity, we suggest you employ a powerful VPN - it can encrypt all the traffic that comes and goes out of your computer, preventing tracking completely.

Lost your files? Use data recovery software

While some files located on any computer are replaceable or useless, others can be extremely valuable.

Family photos, work documents, school projects - these are types of files that we don't want to lose. Unfortunately, there are many ways how unexpected data loss can occur:

  • power cuts
  • Blue Screen of Death errors
  • hardware failures
  • crypto-malware attack
  • even accidental deletion

To ensure that all the files remain intact, you should prepare regular data backups. You can choose cloud-based or physical copies you could restore from later in case of a disaster. If your backups were lost as well or you never bothered to prepare any, can be your only hope to retrieve your invaluable files.

Questions about Diablo6 ransomware virus

How do I open .docm files?

You cannot open them by renaming or with another program, because the content of files ending in .docm has been encrypted. The only ways back are a working decryptor for the family, or clean copies from elsewhere:

  • OneDrive versions
  • File History
  • an offline backup drive
  • Previous Versions if the ransomware did not delete them

Identify the family first by uploading the ransom note and one encrypted file to ID Ransomware or No More Ransom. Avoid websites and programs that promise to open any encrypted file; they do not work and some are scams.

When will a decryptor for Diablo6 ransomware virus be released?

Nobody can promise a date. When we last checked, on 6 October 2026, no free decryptor is known. Decryptors usually appear after one of three events:

  • police seize the attackers' servers and keys
  • the authors leak or publish the master keys
  • researchers find a mistake in how the ransomware generates keys

Some families got a tool within weeks, others never. Keep the encrypted files and the note on an external drive, check No More Ransom every few months, and follow news about the Diablo6 ransomware virus family. A decryptor may need an original file, so keep any unencrypted copies too.

Did Diablo6 ransomware virus steal my files or passwords?

We do not know yet. Nothing published so far shows data theft by Diablo6 ransomware virus, but the only confirmed sign is files that end in .docm and no longer open, which says nothing about what happened before. Many current ransomware attacks copy files or run a password stealer first, so it is wise to act as if they did.

From a clean device, change the passwords that were saved in the browsers on this PC, starting with e-mail and banking, sign out of all sessions and turn on two-step verification. Watch bank statements and account activity for the next few weeks.

Can a data-recovery company decrypt my files for a fee?

Only if a decryptor already exists or the company pays the attackers for you. Some "ransomware recovery" services advertise that they can decrypt families with no known flaw; in practice they negotiate with the attackers and add their own fee. Others use the same free tools listed on No More Ransom.

Before you hire anyone, ask in writing how they will recover the files, whether they will contact the attackers and what happens if they fail. A legitimate service answers clearly. If a free decryptor exists for your family, you can run it yourself.

Should I pay the ransom?

We advise against it, and so do the FBI, Europol and national cyber agencies. Payment does not guarantee a working tool: some attackers never reply, some tools damage files, and some variants have no decryptor at all. Paying also funds further attacks and can make you a target again.

Before considering payment, try every recovery option in this guide and report the attack. Companies must involve their legal adviser and insurer, because payments to sanctioned groups can be illegal. If files are truly irreplaceable, store the encrypted copies and wait; decryptors sometimes appear later.

How did Diablo6 ransomware virus get on my computer?

The way Diablo6 ransomware virus spreads has not been documented yet, so look at your own recent activity. On home PCs, ransomware most often comes with cracked programs, game cheats, key generators and fake updates, or with an e-mail attachment that was opened. On business networks, attackers usually log in through Remote Desktop with a stolen or guessed password.

Think back to what was downloaded or installed in the days before files that end in .docm and no longer open, and check the Downloads folder and Installed apps sorted by date. Keep anything suspicious for your report, but do not run it again.

Is Diablo6 ransomware virus the same as other ransomware with a similar name?

Not necessarily. Ransomware names come from the file extension, the note or a word in the code, so unrelated families often end up with similar names, and one family can appear under several names. The difference matters: a decryptor or advice for one family does not fit another and can damage files.

Compare the ending added to your files and the exact name of the note with the summary table at the top of this guide, then upload the note and one encrypted file to ID Ransomware from a clean device. If the result names another family, follow the guide for that family instead.

Will .docm spread to my other drives?

It can. Ransomware encrypts every drive and network share it can reach while it runs, so external disks, USB sticks and shared folders connected during the attack may also have files ending in .docm. Disconnect everything now, then check each device from a clean computer.

Do not plug a backup drive into the infected PC until the ransomware has been removed with an offline scan. Cloud folders such as OneDrive sync the encrypted versions, but they keep earlier versions you can usually restore.

If I delete Diablo6 ransomware virus, do my files come back?

Unfortunately not. Deleting the program only ends the attack; every file that already has the .docm ending stays encrypted, because decryption needs a key that only the attackers hold.

That is why this guide separates removal from recovery. First make sure Diablo6 ransomware virus is gone with an offline scan, then work through the recovery list:

  • backups
  • OneDrive history
  • Previous Versions
  • copies on other devices and
  • if one exists
  • a decryptor

Do not rename or edit the encrypted files in the meantime, and keep them even if nothing works today.

Will Fortect remove Diablo6 ransomware virus?

Fortect scans Windows for malware and unwanted programs and repairs the system files and settings they change, and its free scan shows what it finds on your PC before you decide anything.

For Diablo6 ransomware virus, follow the plan above as well: the browser steps take back permissions and settings that no scanner treats as a threat, and uninstalling the program that brought it removes the source.

Run Microsoft Defender's full scan and, if anything was found, its offline scan as a second opinion. If the symptoms are gone after the plan and both scans are clean, there is nothing more to do.

Sources

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