HMDL Ransomware Virus: Removal and Encrypted Files Recovery Guide 2026

Your files still have their familiar names, yet documents and photographs suddenly refuse to open. A note called !!README_HMDL!!.txt appears nearby with an unfamiliar payment demand.

That combination points to a disruptive ransomware infection that needs careful handling. Rushing to pay or randomly renaming files can make an already stressful situation harder.

Files encrypted by HMDL ransomware with their original filenames and an opening error

Overview

HMDL encrypts data without adding a new file extension

HMDL is file-encrypting ransomware. It changes the contents of accessible files so ordinary programs cannot interpret them, then demands cryptocurrency for the alleged recovery key.

Unlike many ransomware families, the examined HMDL sample does not append a distinctive extension. A damaged document may keep the same name, icon, and apparent file type.

This detail can cause confusion. Windows may still label a file as a photograph or spreadsheet even though the underlying encrypted data is unusable.

The ransom note is named !!README_HMDL!!.txt

HMDL creates a text note named !!README_HMDL!!.txt in locations where victims are likely to notice it. The message assigns the victim an identification code.

The reviewed note asks for 0.05 BTC and directs the victim to contact an address hosted by Proton Mail. Payment supposedly buys a private decryption key.

A payment request does not prove the attackers possess a working recovery tool. It only proves somebody wants cryptocurrency sent to a wallet they control.

Containment must come before cleanup or file recovery

An infected computer may remain capable of encrypting attached drives, shared folders, or synchronized cloud data. Isolate it before investigating individual files.

Keep copies of the ransom note, suspicious files, and security logs. These details may help an incident responder identify the variant and judge available recovery options.

  • Disconnect the infected device from wired and wireless networks.
  • Unplug backup drives that are not already affected.
  • Do not delete the ransom note or encrypted originals.
  • Record the displayed victim ID and cryptocurrency address.
  • Remove the malware before restoring clean data.

How to Recognize an HMDL Ransomware Infection

Normal-looking filenames conceal unreadable content

A missing extension change makes HMDL less visually obvious than ransomware that renames every file. The strongest clue is a sudden wave of opening errors.

A photograph viewer may report an unsupported or corrupted image. Word processing software may say a document is damaged, encoded incorrectly, or not a recognized format.

Several unrelated file types failing at the same time is more significant than one broken document. It suggests a system-wide event rather than ordinary file corruption.

Changing a filename or extension will not reverse encryption. The readable label is separate from the scrambled data stored inside the file.

The note describes encryption and a private key

The HMDL note claims the malware used ChaCha20-Poly1305 for file encryption and protected its symmetric key with RSA-2048-OAEP.

Those technical claims cannot be trusted simply because criminals wrote them. However, modern ransomware commonly combines fast symmetric encryption with protected per-victim key material.

The note uses cryptographic language to discourage experimentation and make payment feel inevitable. Victims should treat its promises as coercion, not customer service.

The sample note includes a victim identifier, payment amount, Bitcoin address, and contact email. Preserve all four before security software removes surrounding artifacts.

HMDL ransomware note demanding 0.05 BTC and displaying a fictional victim identification code

How HMDL Ransomware Can Reach a Computer

A ransomware executable must run before it can encrypt local data. The initial file may arrive through email, a compromised download, pirated software, or exposed remote access.

The exact entry point varies between incidents. Finding HMDL on one computer does not prove that every victim received the same attachment or visited the same website.

Investigators should preserve browser history, email headers, download records, and Windows event logs. These can reveal how the infection began and whether other devices were exposed.

Malicious email attachments and download links

An unexpected invoice, delivery notice, payroll document, or legal complaint can carry an executable directly. It may also link to a password-protected archive on a file host.

Attackers use archive passwords to bypass automated scanning and create curiosity. The extracted file may imitate a PDF while actually being a script or executable.

Windows can hide known extensions by default. A file named Invoice.pdf.exe may appear as Invoice.pdf, especially when its icon is chosen to resemble a document.

Cracked software and fake installers

Key generators, unofficial activators, game cheats, and repackaged software are common malware delivery vehicles. Their instructions often tell users to disable antivirus protection first.

A fake update can use the same tactic. The installer may display a normal progress window while silently launching ransomware in the background.

Software should come from the developer’s official website, Microsoft Store, or another verified distribution channel. Search advertisements are not proof that a download is authentic.

Stolen passwords and exposed remote services

Some ransomware intrusions begin when criminals obtain remote desktop, VPN, or administrator credentials. They may explore the network before deploying encryption across multiple systems.

Review successful and failed sign-ins, newly created accounts, remote administration tools, and changed security policies. A single encrypted endpoint may be part of a broader compromise.

Change exposed passwords from a clean device. Reusing the infected computer for account recovery can hand the replacement credentials to remaining malware.

Software vulnerabilities and compromised websites

Unpatched internet-facing software can provide another path inside. Vulnerable gateways, remote management panels, and outdated plugins deserve immediate review during a business incident.

A compromised advertising chain or website may redirect visitors toward deceptive downloads. AdGuard can reduce malicious advertising exposure, but it cannot disinfect an encrypted computer.

Security updates, application allowlisting, restricted administrator access, and offline backups provide stronger protection than relying on browser filtering alone.

What HMDL Does After It Runs

Ransomware normally enumerates drives and searches for file types that matter to the victim. Documents, databases, archives, photographs, projects, and business records are common targets.

System files may be skipped so Windows remains usable enough to display the ransom demand. That apparent stability should not be mistaken for a minor infection.

The encryption process can consume noticeable processor, disk, or network resources. On fast systems, however, substantial damage may occur before the user notices unusual activity.

Local files and connected storage may be affected

Any writable location visible to the infected account can be at risk. This includes external disks, mapped drives, network shares, and folders synchronized to cloud services.

Cloud synchronization can upload encrypted versions and replace healthy copies. Version history may help, but only after the infected endpoint is disconnected and cleaned.

Do not attach a clean backup merely to test one file. If HMDL or another loader remains active, the backup could be encrypted as well.

Security settings and recovery features may be targeted

Ransomware sometimes attempts to delete shadow copies, disable recovery services, stop database processes, or weaken security tools. Success depends on the privileges obtained.

Failure of System Restore or missing shadow copies does not identify HMDL by itself. Those conditions can have legitimate causes or result from other malware.

Review changes rather than guessing. A qualified incident responder can compare timestamps, services, scheduled tasks, persistence entries, and event logs across affected machines.

Other malware may remain after encryption stops

The ransomware payload may be only the final stage. An information stealer, remote access trojan, or credential dumping tool could have operated earlier.

Removing the visible ransom note does not remove those components. A complete scan and account review are necessary before the system can be trusted again.

For a business, assume exposed credentials may include email, cloud storage, financial systems, and remote access until evidence shows otherwise.

Security scan detecting and quarantining an HMDL ransomware component

Should You Pay the HMDL Ransom?

Paying is risky. Criminals can accept the Bitcoin and disappear, provide a broken tool, demand more money, or target the same victim again.

Even a functioning decryptor may be slow, unstable, or unable to restore every file. Damaged databases and large archives can remain unusable after partial recovery.

Payment also reveals that the victim can obtain cryptocurrency under pressure. That information may increase future extortion attempts rather than end them.

Organizations should consult legal counsel, their insurer, incident responders, and law enforcement before making any payment decision. Reporting requirements vary by location and exposed data.

The FBI does not support paying a ransom because payment does not guarantee recovery and encourages the ransomware economy. Reporting still matters even when no payment occurs.

Home users should resist direct negotiation. Preserve evidence, remove the malware, check trusted recovery resources, and restore from a verified clean backup when possible.

What to Do if HMDL Ransomware Infected Your Computer

  1. Disconnect the device. Remove Ethernet, disable Wi-Fi, and disconnect shared storage without shutting down other unaffected systems.
  2. Protect clean backups. Keep backup disks detached and pause cloud synchronization until the infected computer has been isolated.
  3. Preserve evidence. Photograph the note, record the victim ID and Bitcoin address, and copy relevant logs when it is safe.
  4. Notify the right people. Contact your administrator, insurer, incident responder, or law enforcement according to the situation.
  5. Secure accounts elsewhere. From a clean device, change exposed passwords and enable multifactor authentication, starting with email and administrator accounts.
  6. Scan before restoring. Use Malwarebytes and additional reputable scanners to remove ransomware, loaders, stealers, and persistence mechanisms.
  7. Check recovery options. Search trusted decryptor projects and test copies of encrypted files, never the only originals.
  8. Rebuild when trust is lost. Businesses and heavily compromised systems may require a clean Windows installation before restoring verified data.

Remove HMDL Ransomware and Recover the Files

The following process separates malware removal from data recovery. Removing HMDL prevents additional damage, but removal alone does not decrypt files already transformed.

Keep the original encrypted files on separate storage before attempting repair. Future research may produce a decryptor even when no suitable tool exists today.

If this is a company device or multiple computers are affected, stop here and involve an incident response professional. Evidence can be lost through well-intentioned cleanup.

Step 1: Restart Windows in Safe Mode with Networking

Safe Mode loads a reduced set of services and drivers. This can make active malware easier to detect, although sophisticated threats may still persist.

Windows 11Windows 10Windows 7
Safe Mode with Networking starts Windows with only the essential drivers and services, which stops most malware from loading — making it much easier to remove. First, we’ll open the Windows Recovery Environment (winRE):

  1. Press Windows key + I to open Settings. If that doesn’t work, right-click the Start button and select Settings. Then, in the right-hand pane, click Recovery.
    Go to Windows Settings
  2. Under Advanced startup, click Restart now. Save any open work first — your PC will restart immediately.
    Recovery window in Windows 10

Your PC will restart into the Windows Recovery Environment. From there, follow these steps to reach Safe Mode:

  1. On the Choose an option screen, select Troubleshoot.
    Windows 11 - Start in Safe Mode with Network
  2. On the Troubleshoot screen, click Advanced Options.
    Windows 11 - Start in Safe Mode with Network - Step 2
  3. On the Advanced Options page, click Startup Settings.
    Windows 11 - Start in Safe Mode with Network - Step 3
  4. On the Startup Settings page, click Restart.
    Windows 11 - Start in Safe Mode with Network - Step 4
  5. After your PC restarts, you’ll see a list of startup options. Press 5 or F5 to start Safe Mode with Networking.
    Boot in Safe Mode Windows 11
  6. You’ll know you’re in Safe Mode when “Safe Mode” appears in the corners of the screen. Now continue with the next step of this guide — downloading and running Malwarebytes (explained in Step 2).
Safe Mode with Networking starts Windows with only the essential drivers and services, which stops most malware from loading — making it much easier to remove. First, we’ll open the Windows Recovery Environment (winRE):

  1. Press Windows key + I to open Settings. If that doesn’t work, click the Start button and select Settings (the gear icon).
    Go to Windows Settings
  2. In the Windows Settings window, select Update & Security, then click Recovery.
    Recovery window in Windows 10
  3. Under Advanced startup, click Restart now. Save any open work first — your PC will restart immediately.
    Open Advance Startup

Your PC will restart into the Windows Recovery Environment. From there, follow these steps to reach Safe Mode:

  1. On the Choose an option screen, select Troubleshoot.
    Windows 10 - Start in Safe Mode with Network
  2. On the Troubleshoot screen, click Advanced Options.
    Windows 10 - Start in Safe Mode with Network - Step 2
  3. On the Advanced Options page, click Startup Settings. (On Windows 8, this option is labeled Windows Startup Settings.)
    Windows 10 - Start in Safe Mode with Network - Step 3
  4. On the Startup Settings page, click Restart.
    Windows 10 - Start in Safe Mode with Network - Step 4
  5. After your PC restarts, you’ll see a list of startup options. Press 5 or F5 to start Safe Mode with Networking.
    Boot in Safe Mode Windows 10
  6. You’ll know you’re in Safe Mode when “Safe Mode” appears in the corners of the screen. Now continue with the next step of this guide — downloading and running Malwarebytes (explained in Step 2).
Safe Mode with Networking starts Windows with only the essential drivers and services, which stops most malware from loading — making it much easier to remove. Here’s how to get there on Windows 7:

  1. Remove any CDs, DVDs, or USB drives from your computer, then restart it.
  2. As soon as the computer starts (when the hardware information appears on screen), press the F8 key repeatedly until the Advanced Boot Options menu appears. If Windows starts normally instead, you pressed F8 too late — restart and try again.
    F8 Safe Mode
  3. On the Advanced Boot Options screen, use the arrow keys to highlight Safe Mode with Networking, then press Enter.
    Safe Mode with Networking screen
  4. Once you’re in Safe Mode with Networking, continue with the next step of this guide — downloading and running Malwarebytes (explained in Step 2).
    Can’t get into Safe Mode with Networking? No problem — you can run the Malwarebytes scan in normal mode instead and continue the guide from there.

Step 2: Scan the computer with Malwarebytes

Malwarebytes can identify ransomware components, downloaders, and related threats. Update its definitions, perform a thorough scan, and quarantine everything confirmed as malicious.

Malwarebytes is one of the most popular and trusted anti-malware tools for Windows — and it’s completely free for removing infections. It catches threats that many antivirus programs miss, including adware, browser hijackers, and trojans. Follow the steps below to scan and clean your PC in just a few minutes.

  1. Download Malwarebytes

    Click the button below to download the latest version of Malwarebytes for Windows from the official source. The free version is all you need — it will scan your computer and remove adware, browser hijackers, and other malicious software at no cost.

    DOWNLOAD MALWAREBYTES FOR WINDOWS (FREE)

    (The link opens in a new page where your download will start)
  2. Install Malwarebytes

    When the download finishes, open your Downloads folder and double-click the MBSetup file. If Windows shows a User Account Control pop-up, click “Yes” to allow the installation.

    MBAM1
  3. Follow the On-Screen Prompts to Install Malwarebytes

    The setup wizard will walk you through a few quick screens:

    • Choose where you’re installing the program — “Personal Computer” or “Work Computer” — then click Next.

      MBAM3 1
    • Malwarebytes will now install on your device. This usually takes under a minute.

      MBAM4
    • When installation is complete, the “Welcome to Malwarebytes” screen will open automatically.

      MBAM6 1
    • On the final screen, click Open Malwarebytes to launch the program.

      MBAM5 1
  4. Enable “Scan for Rootkits”

    Before scanning, turn on rootkit detection so Malwarebytes can find even the most hidden threats. Click the Settings gear icon on the left side of the screen.

    MBAM8

    In the settings menu, find “Scan for rootkits” and click the toggle so it turns blue.

    MBAM9

    Done? Click “Dashboard” in the left pane to return to the main screen.

  5. Start the Scan

    Click the blue Scan button. Malwarebytes will automatically update its virus database and start checking your computer for malware.

    MBAM10
  6. Wait for the Scan to Finish

    The scan checks your entire system for browser hijackers and other malicious programs, so it can take several minutes. Feel free to do something else — just check back occasionally to see the progress.

    MBAM11
  7. Quarantine the Detected Threats

    When the scan is done, you’ll see a list of everything Malwarebytes found — malware, adware, and potentially unwanted programs. Click the “Quarantine” button to remove all of them at once.

    MBAM12

    Malwarebytes will now remove the malicious files and registry entries and move them safely into quarantine.

    MBAM13

  8. Restart Your Computer

    Some threats can only be fully removed after a reboot. If Malwarebytes asks you to restart, click Yes. Once you’re logged back in, your PC is clean and you can continue with the next steps in this guide.

    MBAM14

Step 3: Run a second-opinion scan with HitmanPro

A second scanner can catch remnants missed by the first pass. Review detections carefully, especially on business systems containing custom administrative tools.

HitmanPro is a second-opinion scanner — it’s designed to catch what your main antivirus might have missed. Instead of relying on a single detection engine, it checks the behavior of files in the locations where malware usually hides. Anything suspicious gets sent to the cloud, where it’s analyzed by two of the best antivirus engines available: Bitdefender and Kaspersky.

Good news: scanning is completely free, with no limits. You only need a license when it’s time to remove what was found — and even then, you can activate a free one-time 30-day trial to clean your PC at no cost. (A full license is $24.95 per year for 1 PC.)

  1. Download HitmanPro

    Click the button below to download HitmanPro. Remember — the scan is free, so you have nothing to lose by checking your PC.

    DOWNLOAD HITMANPRO (FREE SCAN)
    (The link opens in a new page where your download will start)
  2. Install HitmanPro

    When the download finishes, open your Downloads folder and double-click the file: “hitmanpro.exe” on 32-bit Windows, or “hitmanpro_x64.exe” on 64-bit Windows.

    Double-click on the HitmanPro file

    If a User Account Control pop-up asks whether HitmanPro can make changes to your device, click “Yes” to continue.

    Windows asking for permissions to run the HitmanPro setup

  3. Follow the On-Screen Prompts

    On the HitmanPro start screen, click “Next” to begin the system scan. No lengthy setup required — it goes straight to work.

    Click Next to install HitmanPro on your PC

    HitmanPro final installer screen

  4. Wait for the Scan to Finish

    HitmanPro will now check your computer for malicious programs. This usually takes just a few minutes thanks to its cloud-based scanning.
    HitmanPro scans your computer for any infections, adware, or potentially unwanted programs that may be present

  5. Review the Results and Click “Next”

    When the scan is done, HitmanPro will show you everything it found. Click “Next” to remove the detected threats.

    HitmanPro scan summary. Click Next to remove malware

  6. Click “Activate Free License”

    To remove the malicious files, click the “Activate free license” button. This starts your free 30-day trial — no payment details needed — and unlocks the full cleanup.
    Click on the Activate free license button

    When the removal is complete, HitmanPro will show a summary of everything it cleaned. Click Next, then click Reboot if prompted. If there’s no reboot prompt, just click Close — your PC is clean.

Step 4: Check for remaining threats with ESET

An additional ESET scan helps confirm that no active payload or related malware remains. Do not reconnect backups until the system is considered clean.

ESET Online Scanner is a free second-opinion scanner that performs a deep, full-system check for viruses, trojans, rootkits, and other malware. We use it as the final step because it’s thorough — if anything slipped past the previous scans, ESET will find it. A clean result here means your computer is malware-free.

  1. Download ESET Online Scanner

    Click the button below to download ESET Online Scanner.

    DOWNLOAD ESET ONLINE SCANNER (FREE)

    (The link opens in a new page where your download will start)
  2. Run the Installer

    When the download finishes, open your Downloads folder and double-click “esetonlinescanner.exe“.
    Image - Double-click on the ESET Online Scanner setup file

  3. Install ESET Online Scanner

    On the start screen, select your language from the drop-down menu and click Get started.

    Image - Click Get Started to install ESET Online Scanner

    On the Terms of use screen, click Accept.
    Image - Accept Terms to Install ESET Online Scanner

    Choose your preferences for the Customer Experience Improvement Program and the Detection feedback system (either choice is fine), then click Continue.
    Image - Follow the on-screen prompts

  4. Start a Full Scan

    Click Full Scan — this checks your entire computer, not just the common hiding spots.

    Start a Full Scan with ESET Online Scanner

    Select Enable for Detection of Potentially Unwanted Applications — this lets ESET catch adware and bundled junk programs, not just viruses. Then click Start scan.

    Image - Enable PUA Detection and Start Scan

  5. Wait for the Scan to Finish

    ESET will now check every file on your computer. Because it’s a full scan, this can take a while — often an hour or more, depending on how much data you have. Leave it running in the background and check on it from time to time.

    Image- Wait for the ESET Online Scanner scan to finish

  6. Review the Results

    When the scan completes, the Found and resolved detections screen appears. Any threats found were automatically cleaned and quarantined — there’s nothing extra you need to do. Click View detailed results if you want to see exactly what was removed.
    Image - ESET Online Scanner malware removal

    If ESET found nothing — congratulations, your computer has passed the final check and is malware-free.

Step 5: Attempt recovery only after the infection is removed

Start with a verified offline backup. If none exists, check cloud version history, trusted decryptor databases, and recovery methods on copies of the encrypted files.

Unfortunately, in most cases, it’s not possible to recover the files encrypted by this ransomware virus because the private key which is needed to unlock the encrypted files is only available through the attackers. However, below we’ve listed three options you can use to try and recover your files.

Make sure you remove the malware from your computer first, otherwise, it will repeatedly lock your system or encrypt files. If you suspect that your computer is still infected with malware, you can run a free scan with Emsisoft Emergency Kit.

Option 1: Search a decryption tool for this ransomware

The cybersecurity community is constantly working to create ransomware decryption tools, so you can try to search these sites for updates:

Option 2: Use EaseUS Data Recovery Wizard Free to recover the encrypted files

EaseUS Data Recovery Wizard Free can restore files and repair corrupted files with simple clicks. Its powerful scanning algorithms can identify and retrieve huge file type library, including all of the popular video files, audio files, photos, and document formats.
While the free version only allows you to recover 2 GB of data, this can be helpful to see if the recovery is possible and restore back the most important files from your computer.

  1. Download EaseUS Data Recovery Wizard Free.

    You can download EaseUS Data Recovery Wizard Free by clicking the link below.

    EASEUS DATA RECOVERY WIZARD FREE DOWNLOAD LINK

    (The above link will open a new page from where you can download EaseUS Data Recovery Wizard)
  2. Double-click on the EaseUS Data Recovery Wizard Free setup file.

    When EaseUS Data Recovery Wizard Free has finished downloading, double-click on the setup file to install EaseUS Data Recovery Wizard on your computer. In most cases, downloaded files are saved to the Downloads folder.

    Image: EaseUS Data Recovery Wizard Free Installer

    You may be presented with a User Account Control pop-up asking if you want to allow EaseUS to make changes to your device. If this happens, you should click “Yes” to continue with the EaseUS Data Recovery Wizard Free installation.

  3. Follow the on-screen prompts to install EaseUS Data Recovery Wizard.

    When the EaseUS Data Recovery Wizard installation begins, click on the “Install Now” as seen in the image below.
    EaseUS Data Recovery Wizard Free Install Now

    When your EaseUS Data Recovery Wizard installation completes, click the “Start Now” button to start the program.
    Image: Click Start Now

  4. Select a location to start recovering the encrypted files.

    Choose the drive or folder where you are the encrypted files that you want to recover and click “Scan“.
    Select a location to start recovering the encrypted files

  5. Wait for the EaseUS Data Recovery Wizard scan to complete.

    EaseUS Data Recovery Wizard will now scan your computer files that can be restored. This process can take a few minutes, so we suggest you do something else and periodically check on the status of the scan to see when it is finished.
    Image: Wait for the EaseUS Data Recovery Wizard scan to complete.

  6. Find the files you want to recover.

    When the EaseUS Data Recovery Wizard scan is finished scanning it will show a screen that displays the files that can be recovered. This tool can recover a lot of data, use the “Filter” button to quickly filter specific file types and find the files that you want to recover.
    Filter the Files by Type

    Click the “Preview” button or double-click on a file for a full preview.
    Image: Click Preview to view the file

  7. Select your files and click “Recover”.

    Finally, select the the files you want to recover and click “Recover“.
    Select your files and click Recover
    Choose a safe location to save all the files.
    Select a safe location
    The free version only allow you to recover 2 GB of data, however, this will allow you to recover the most important files and see if EaseUS Data Recovery Wizard can correctly recover them.
    Image: View Recovered Files

Option 3: Try to restore your files with ShadowExplorer

This ransomware will attempt to delete all shadow copies when you first start any executable on your computer after becoming infected. Thankfully, the infection is not always able to remove the shadow copies, so you should continue to try restoring your files using this method.

  1. Download ShadowExplorer.

    You can download ShadowExplorer from the below link.

    SHADOW EXPLORER DOWNLOAD LINK
    (This link will open a new web page from where you can download “ShadowExplorer”)
  2. Install ShadowExplorer.

    Double-click on the ShadowExplorer-x.x-setup file to start the installation process, then follow the on-screen promts to install this program.
    Install Shadow Defender

  3. Select snapshot date.

    Open ShadowExplorer and then from the top bar select the drive where the files that you want to save are located, then select from the snapshot available one previous to this infection.

    Select drive and date to recover the files encrypted by this ransomware

  4. Export the files that you want to recover.

    Once you have found a copy of the original file or folder, right-click on it and the select “Export”. A window will prompt you where you want to save the file or folder.
    Find copy then click on Expor to recover the files encrypted by this ransomware

How to Protect Your Files From Another Ransomware Attack

A recovery plan is strongest when it assumes one device will eventually fail or become compromised. Keep multiple copies rather than trusting a single external drive.

Use the 3-2-1 principle: three copies, on two storage types, with one copy offline or offsite. Test restoration instead of assuming the backup works.

Versioned cloud storage can help with accidental replacement, but it should complement an offline backup. Synchronized folders alone are not a ransomware strategy.

Reduce the chance that an unknown file can run

Show file extensions in Windows, block macros from internet documents, and avoid cracked software. Standard user accounts limit damage compared with routine administrator use.

Keep Windows, browsers, document readers, remote access tools, and internet-facing applications updated. Remove software that no longer receives security fixes.

AdGuard can help block malicious advertising and known harmful destinations during browsing. Keep endpoint protection enabled because filtering cannot inspect every downloaded or locally launched file.

Harden remote access and important accounts

Disable unused remote services. Place necessary access behind a VPN, require multifactor authentication, restrict source addresses, and monitor unsuccessful sign-ins.

Use unique passwords for email, backup administration, and remote management. A password manager prevents one stolen credential from unlocking several critical systems.

Business networks should separate ordinary workstations from servers and backup repositories. Segmentation can limit how far one compromised account can reach.

Practice recovery before an emergency

Choose several representative files and restore them periodically. Confirm their contents open correctly rather than accepting a backup program’s successful status.

Document who can isolate systems, contact providers, authorize restoration, and notify affected people. A written plan reduces hesitation during a fast-moving incident.

Keep recovery instructions somewhere ransomware cannot encrypt. Printed contact details and an offline copy of the response plan can be invaluable.

HMDL Ransomware FAQ

Does HMDL add an extension to encrypted files?

The examined HMDL sample leaves filenames and extensions unchanged. Files can therefore look normal in Explorer while their encrypted contents remain unreadable.

Can renaming an HMDL file restore it?

No. Renaming changes only the label Windows displays. It does not reverse the cryptographic transformation applied to the file’s contents.

Is there a free HMDL decryptor?

No confirmed public HMDL decryptor was identified during this review. Availability can change, so check trusted recovery projects without uploading confidential originals.

Will Malwarebytes decrypt HMDL files?

Malwarebytes is intended to detect and remove malicious software. It does not automatically decrypt data that HMDL already encrypted.

Should I delete the !!README_HMDL!!.txt note?

Keep a copy. The note contains identifiers and payment details that may help researchers, incident responders, insurers, or law enforcement connect related cases.

Can I restore files immediately after disconnecting the computer?

Wait until the malware is removed and the system is trustworthy. Restoring too early can expose a clean backup to remaining ransomware or another active loader.

The Bottom Line

HMDL is dangerous because encrypted files may keep their original names. The ransom note and widespread opening errors reveal damage that ordinary icons can conceal.

Isolate the computer, preserve evidence, remove every malicious component, then restore from verified backups or trusted recovery methods. Never treat a cryptocurrency demand as guaranteed support.

If your current antivirus allowed this malicious program on your computer, you may want to consider purchasing the full-featured version of Malwarebytes Anti-Malware to protect against these types of threats in the future.
If you are still having problems with your computer after completing these instructions, then please follow one of the steps:

10 Rules to Avoid Online Scams

Here are 10 practical safety rules to help you avoid malware, online shopping scams, crypto scams, and other online fraud. Each tip includes a quick “if you already got hit” action.

  1. Stop and verify before you click, log in, download, or pay.

    warning sign

    Most scams win by creating urgency. Verify using a trusted method: type the website address yourself, use the official app, or call a known number (not the one in the message).

    If you already clicked: close the page, do not enter passwords, and run a malware scan.

  2. Keep your operating system, browser, and apps updated.

    updates guide

    Updates patch security holes used by malware and malicious ads. Turn on automatic updates where possible.

    If you saw a scary “update now” pop-up: close it and update only through your device settings or the official app store.

  3. Use layered protection: antivirus plus an ad blocker.

    shield guide

    Antivirus helps block malware. An ad blocker reduces scam redirects, phishing pages, and malvertising.

    If your browser is acting weird: remove unknown extensions, reset the browser, then run a full scan.

  4. Install apps, software, and extensions only from official sources.

    install guide

    Avoid cracked software, “keygens,” and random downloads. During installs, choose Custom/Advanced and decline bundled offers you do not recognize.

    If you already installed something suspicious: uninstall it, restart, and scan again.

  5. Treat links and attachments as untrusted by default.

    cursor sign

    Phishing often impersonates delivery services, banks, and popular brands. If it is unexpected, do not open attachments or log in through the message.

    If you entered credentials: change the password immediately and enable 2FA.

  6. Shop safely: research the store, then pay with protection.

    trojan horse

    Be cautious with brand-new stores, “closing sale” stories, and prices that make no sense. Prefer credit cards or PayPal for dispute options. Avoid wire transfers, gift cards, and crypto payments.

    If you already paid: contact your card issuer or PayPal quickly to dispute the transaction.

  7. Crypto rule: never pay a “fee” to withdraw or recover money.

    lock sign

    Common patterns include fake profits, then “tax,” “gas,” or “verification” fees. Another is a “recovery agent” who demands upfront crypto.

    If you already sent crypto: stop paying, save evidence (wallet addresses, TXIDs, chats), and report the scam to the platform used.

  8. Secure your accounts with unique passwords and 2FA (start with email).

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    Use a password manager and unique passwords for every account. Enable 2FA using an authenticator app when possible.

    If you suspect an account takeover: change passwords, sign out of all devices, and review recent logins and recovery settings.

  9. Back up important files and keep one backup offline.

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    Backups protect you from ransomware and device failure. Keep at least one backup on an external drive that is not always connected.

    If you suspect infection: do not connect backup drives until the system is clean.

  10. If you think you are a victim: stop losses, document evidence, and escalate fast.

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    Move quickly. Speed matters for disputes, account recovery, and limiting damage.

    • Stop payments and contact: do not send more money or respond to the scammer.
    • Call your bank or card issuer: block transactions, replace the card if needed, and start a dispute or chargeback.
    • Secure your email first: change the email password, enable 2FA, and remove unfamiliar recovery options.
    • Secure other accounts: change passwords, enable 2FA, and log out of all sessions.
    • Scan your device: remove suspicious apps or extensions, then run a full malware scan.
    • Save evidence: screenshots, emails, order pages, tracking pages, wallet addresses, TXIDs, and chat logs.
    • Report it: to the payment provider, marketplace, social platform, exchange, or wallet service involved.

These rules are intentionally simple. Most online losses happen when decisions are rushed. Slow down, verify independently, and use payment methods and account controls that give you recourse.

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