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Remove Hermes837 ransomware (Virus Removal Instructions) - Recovery Instructions Included

removal by Lucia Danes - - | Type: Ransomware

Hermes837 ransomware is a crypto-malware which changes Windows registry and performs other system modifications

Hermes837 ransomware

Hermes837 ransomware is a type of malware that enters host machines in deceptive ways and alters the structure of all personal files like pictures, documents, music, videos, etc., to prevent victims from opening them. For that, a robust encryption algorithm is used, and each of the affected files receives a .hermes837 marker.

At that point, users are also presented with a ransom note !!!READ_ME!!!.txt which is dropped into each of the affected files' folder. This message from the hackers behind Hermes837 virus explains that all the personal files got encrypted and allegedly the only way to recover the access to them is by retrieving a unique key that is in malware authors' control. For communication purposes, users are provided a contact email –

However, victims should avoid contact with cybercriminals as they might not provide the necessary decryption tool – users will end up losing files and money. Thus, if you noticed your data is not accessible, you should listen to experts' advice[1] and avoid contacting threat actors behind Hermes837 ransomware.

Name Hermes837
Type Ransomware
File extension .hermes837
Ransom note !!!READ_ME!!!.txt
Infection means Spam emails, fake updates, software vulnerabilities, cracks, unprotected RDP, etc.
Related files
Removal Use anti-malware software like Reimage or SpyHunter 5Combo Cleaner 
File recovery Only available via backups or third-party recovery software

Ransomware is among the most devastating computer infections in the wild, as even Hermes837 ransomware removal will not bring the locked files back. The truth is, data is not actually corrupted in any way – it is simply locked by a unique password which is generated during the encryption process and send to the Command and Control server to hackers. As of now, it is not known whether symmetric or asymmetric encryption[2] is used by Hermes837 file virus.

To retrieve access to Hermes837 ransomware-locked files, victims need to get hold of the key which is created for each host individually. Therefore, file decryption using a key designed for another victim won't work. Besides, the malware is programmed to delete Shadow Volume Copies – and automatic Windows file backup system. Due to this scheme, Hermes837 and other ransomware viruses are so efficient.

How much will cyber criminals ask for the decryptor is unknown, although they always ask for the Bitcoins or another digital currency to be transferred to a specific wallet which is emailed via the contact address. The sums sometimes go as high as few thousands of dollars, although experts observed samples of ransomware that only ask for relatively low sums.

Hermes837 ransomware virus
Hermes837 is ransomware-type of malware which drops a ransom note !!!READ_ME!!!.txt after file encryption process is complete

To convince users to pay, Hermes837 ransomware developers also offer a free test decryption option, as stated in the ransom note:

Whats Happen?
Your files are encrypted, and currently unavailable. You can check it- all files on your computer has extension .hermes
By the way, everything is possible to restore, but you need to follow our instructions. Otherwise, you cant return your data (NEVER).
Free decryption as guarantee!
Before paying you send us up to 2 files for free decryption.
Send pictures, text files. (files no more than 1mb)
If you upload the database, your price will be doubled

While the Hermes837 virus authors may indeed send you they required decryptor, do not forget that you will be funding cybercriminal activities in the process – it will only make confirm that ransomware works as intended, and more victims will be infected.

Instead, remove Hermes837 ransomware and use alternative recovery methods we provide below if you had no backups ready. You should use reputable anti-malware software (such as Reimage or SpyHunter 5Combo Cleaner) and scan your system in Safe Mode with Networking if the virus is interfering with a security program.

Precautionary measures against ransomware is a worthy investment

The main reason why users get infected with ransomware and other severe malware is carelessness. In most of the cases, malware can be avoided if the correct prevention methods are used when browsing the web, opening emails, and performing other actions on the computer.

As a general rule, most of the infections appear when a computer is connected to the internet or a network, and most machines are nowadays. Therefore, follow these security tips to ensure that you avoid the deadly consequences of ransomware infection:

  • Make sure your machine is protected with comprehensive security software that uses real-time scanning feature;
  • Update your operating system and installed applications on a regular basis to avoid software vulnerabilities from being abused – malware can be installed automatically in such a case, without any interaction;
  • Install additional applications for more security. For example, a browser extension that prevents ads from being shown is a great solution to prevent JavaScript from being executed on malicious websites;
  • Never open email attachments that ask you to enable the macro feature (unless you know precisely why this type of file is sent to you via the email) or click on links provided inside spam emails. Also, don't forget that email spoofing[3] can be used in order to make the message seem legitimate;
  • Backup your files regularly to avoid the ramifications of ransomware infection.

Hermes837 encrypted files
Soon after the infection, users will notice their files appended with .hermes837 extension - they will no longer be able to open these files

Enter Safe Mode if Hermes837 ransomware prevents its removal

Once infected with Hermes837 virus, you should not panic, as not everything is lost. In the worst-case scenario, you could try buying the decryptor from the hackers, but, this option should only be used only as an absolute last resort. Remember, these people are cybercriminals and do not care about your well-being – they only want your money and might never provide the required tool after the payment.

Regardless if decide to pay or not, you need to remove Hermes837 ransomware before attempting file recovery, as all the decoded data will be immediately locked once again. To do that, you should employ anti-malware software like Reimage or SpyHunter 5Combo Cleaner and perform a full system scan. If the virus is tampering with anti-malware tools, make sure you access Safe Mode with Networking as explained below.

Note that manual Hermes837 ransomware removal is possible, but it requires advanced computer knowledge and is not recommended for any regular users.

Once you delete Hermes837 ransomware, you can then proceed with file recovery – there should be no troubles if you had backups ready. Alternatively, you can make use of third-party recovery tools which might be able to retrieve at least some of your data. Finally, you can make copies of all the encrypted files and wait till security experts create a tool specifically designed for this ransomware strain.

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Reimage (remover) Happiness
Compatible with Microsoft Windows Supported versions Compatible with OS X Supported versions
What to do if failed?
If you failed to remove virus damage using Reimage, submit a question to our support team and provide as much details as possible.
Reimage is recommended to remove virus damage. Free scanner allows you to check whether your PC is infected or not. If you need to remove malware, you have to purchase the licensed version of Reimage malware removal tool.
Alternative Software
Different security software includes different virus database. If you didn’t succeed in finding malware with Reimage, try running alternative scan with SpyHunter 5.
Alternative Software
Different security software includes different virus database. If you didn’t succeed in finding malware with Reimage, try running alternative scan with Combo Cleaner.

To remove Hermes837 virus, follow these steps:

Remove Hermes837 using Safe Mode with Networking

To access Safe Mode with networking and remove Hermes837 ransomware safely, perform the following actions:

  • Step 1: Reboot your computer to Safe Mode with Networking

    Windows 7 / Vista / XP
    1. Click Start Shutdown Restart OK.
    2. When your computer becomes active, start pressing F8 multiple times until you see the Advanced Boot Options window.
    3. Select Safe Mode with Networking from the list Select 'Safe Mode with Networking'

    Windows 10 / Windows 8
    1. Press the Power button at the Windows login screen. Now press and hold Shift, which is on your keyboard, and click Restart..
    2. Now select Troubleshoot Advanced options Startup Settings and finally press Restart.
    3. Once your computer becomes active, select Enable Safe Mode with Networking in Startup Settings window. Select 'Enable Safe Mode with Networking'
  • Step 2: Remove Hermes837

    Log in to your infected account and start the browser. Download Reimage or other legitimate anti-spyware program. Update it before a full system scan and remove malicious files that belong to your ransomware and complete Hermes837 removal.

If your ransomware is blocking Safe Mode with Networking, try further method.

Remove Hermes837 using System Restore

You can also terminate the infection with the help of System Restore:

  • Step 1: Reboot your computer to Safe Mode with Command Prompt

    Windows 7 / Vista / XP
    1. Click Start Shutdown Restart OK.
    2. When your computer becomes active, start pressing F8 multiple times until you see the Advanced Boot Options window.
    3. Select Command Prompt from the list Select 'Safe Mode with Command Prompt'

    Windows 10 / Windows 8
    1. Press the Power button at the Windows login screen. Now press and hold Shift, which is on your keyboard, and click Restart..
    2. Now select Troubleshoot Advanced options Startup Settings and finally press Restart.
    3. Once your computer becomes active, select Enable Safe Mode with Command Prompt in Startup Settings window. Select 'Enable Safe Mode with Command Prompt'
  • Step 2: Restore your system files and settings
    1. Once the Command Prompt window shows up, enter cd restore and click Enter. Enter 'cd restore' without quotes and press 'Enter'
    2. Now type rstrui.exe and press Enter again.. Enter 'rstrui.exe' without quotes and press 'Enter'
    3. When a new window shows up, click Next and select your restore point that is prior the infiltration of Hermes837. After doing that, click Next. When 'System Restore' window shows up, select 'Next' Select your restore point and click 'Next'
    4. Now click Yes to start system restore. Click 'Yes' and start system restore
    Once you restore your system to a previous date, download and scan your computer with Reimage and make sure that Hermes837 removal is performed successfully.

Bonus: Recover your data

Guide which is presented above is supposed to help you remove Hermes837 from your computer. To recover your encrypted files, we recommend using a detailed guide prepared by security experts.

If your files are encrypted by Hermes837, you can use several methods to restore them:

Data Recovery Pro might be useful when trying to recover encrypted data

Some of the files might be recovered by using Data Recovery Pro – a professional tool that can retrieve the copies of the files on the HDD if they were not overwritten with a piece of new information.

  • Download Data Recovery Pro;
  • Follow the steps of Data Recovery Setup and install the program on your computer;
  • Launch it and scan your computer for files encrypted by Hermes837 ransomware;
  • Restore them.

Make use of Windows Previous Versions feature

Windows Previous Versions feature would allow you to restore files to their previous (working) condition if System Restore was activated prior to ransomware infection.

  • Find an encrypted file you need to restore and right-click on it;
  • Select “Properties” and go to “Previous versions” tab;
  • Here, check each of available copies of the file in “Folder versions”. You should select the version you want to recover and click “Restore”.

ShadowExplorer might restore all your data in some cases

If Hermes837 file virus failed to delete Shadow Volume Copies for some reason, there is a high chance ShadowExplorer will be able to retrieve all encoded files.

  • Download Shadow Explorer (;
  • Follow a Shadow Explorer Setup Wizard and install this application on your computer;
  • Launch the program and go through the drop down menu on the top left corner to select the disk of your encrypted data. Check what folders are there;
  • Right-click on the folder you want to restore and select “Export”. You can also select where you want it to be stored.

No decryption tool is currently available

Finally, you should always think about the protection of crypto-ransomwares. In order to protect your computer from Hermes837 and other ransomwares, use a reputable anti-spyware, such as Reimage, SpyHunter 5Combo Cleaner or Malwarebytes

About the author

Lucia Danes
Lucia Danes - Virus researcher

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