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Remove Gerosan ransomware (Easy Removal Guide) - Recovery Instructions Included

removal by Gabriel E. Hall - - | Type: Ransomware

Gerosan ransomware is a file locking threat that demands $980 payment for the decryption tool in hackers' possession

Gerosan ransomware
Gerosan ransomware is a file locking virus that locks personal files and asks victims to pay ransom of $980 for the decryption key

Gerosan ransomware is a crypto-malware that first started attacking users in mid-June 2019. The virus belongs to STOPDjvu family – one of the most prominent ransomware strings currently, and new variants are released regularly.

As soon as Gerosan ransomware enters the machine, it starts looking for files to encrypt. All the detected pictures, videos, images, documents, and others get locked with a secure encryption algorithm, such as AES and receive a .gerosan extension. While the data is not damaged, being able to use it again does require a specific key that is stored on a remote server that is controlled by hackers.

Due to the Gerosan virus infection, threat actors can then blackmail users into making them pay $980 or $490 in Bitcoin for the unique decryptor that would be able to unlock all the encrypted files. Hackers also provide contact information (gorentos@bitmessage.ch, gorentos@firemail.cc or @datarestore Telegram account) inside the ransom note _readme.txt, which is dropped into each affected folder.

Name Gerosan 
Type Ransomware, cryptovirus
Infiltration  Spam emails, exploits, cracked software, fake updates, web injects, etc.
Malware family STOP-Djvu
Cipher AES, RSA, or other
Contact gorentos@bitmessage.ch, gorentos@firemail.cc or @datarestore 
Ransom note  _readme.txt
Ransom size $980 or $490 in Bitcoin
Virus removal Use reputable anti-malware software like SpyHunterCombo Cleaner or Malwarebytes Malwarebytes
Recovery Scan your computer with Reimage to fix virus damage
File decryption Might be possible with the help of STOPDecrypter [download link]. Otherwise, third-party recovery software can be used

Before Gerosan ransomware encrypts files, it performs a variety of the operating system modifications, including:

  • Downloading and extracting a variety of files to ensure smooth operation of the virus;
  • Loading Runtime modules;
  • Deleting Shadow Volume Copies[1] to prevent data restore;
  • Modifying Windows registry to increase persistence;
  • Elevating privileges to those of admin account, etc.

These changes can sometimes complicate Gerosan ransomware removal. However, entering Safe Mode can temporarily disable malware's functions and allow the security software to delete it without interruptions. Additionally, users should also scan their device with Reimage for prompt system file recovery.

As soon as Gerosan ransomware virus encrypts all personal files, it drops a ransom note which reads:

ATTENTION!

Don't worry, you can return all your files!
All your files like photos, databases, documents and other important are encrypted with strongest encryption and unique key.
The only method of recovering files is to purchase decrypt tool and unique key for you.
This software will decrypt all your encrypted files.
What guarantees you have?
You can send one of your encrypted file from your PC and we decrypt it for free.
But we can decrypt only 1 file for free. File must not contain valuable information.
You can get and look video overview decrypt tool:
https://we.tl/t-hvv30uAtTY
Price of private key and decrypt software is $980.
Discount 50% available if you contact us first 72 hours, that's price for you is $490.
Please note that you'll never restore your data without payment.
Check your e-mail “Spam” or “Junk” folder if you don't get answer more than 6 hours.

To get this software you need write on our e-mail:
gorentos@bitmessage.ch

Reserve e-mail address to contact us:
gorentos@firemail.cc

Our Telegram account:
@datarestore

Do not be convinced by cybercriminals, as them offering a free test decryption does not make it any less risky when paying the ransom, and they might simply take your money and never send you the decryption key.

Instead, remove Gerosan ransomware using anti-malware software and then use alternative data recovery methods we described below if you had no backups prepared. Additionally, experts[2] recommend using repair software like Reimage to fix altered Windows registry and remediate infected Windows system files.

Ways you could avoid ransomware virus infections

Ransomware viruses are among the most dangerous malware families out there, as the damage done by them might be tremendous. Losing the irreplaceable pictures, losing hours spent on the working document is pretty devastating. Nevertheless, ransomware also managed to wreak havoc in high-profile organizations and cause millions of dollars of damages in IT system restoration costs.[3]

Additionally, while some ransomware viruses are decryptable due to security experts' research, some viruses might lock your files forever, and you will never get them back. If you have a backup, however, you can negate most of the negative impact on the system.

While no method would protect you 100%, you can reduce the probability of ransomware infection to a minimum if you follow these tips:

  • Install anti-malware software and enable the Firewall;
  • Update your system and all the installed programs regularly;
  • Install ad-blocker (however, do not forget to add exclusions to sites you want to support);
  • Do not download pirated software and its cracks;
  • Stay away from spam email attachments and hyperlinks;
  • Adequately protect your Remote Desktop connection when using (do not use a default port);
  • Backup your files!

Remove Gerosan ransomware by using anti-malware software and only then attempt file recovery

Gerosan ransomware removal might be easy, as long as anti-malware software you are using is capable of recognizing the threat. Nevertheless, even the potent software might fail due to ransomware interfering with its operation. For that reason, you should enter Safe Mode with Networking – this environment will temporarily disable the process of the virus.

Once you remove Gerosan virus from your computer entirely, you can connect your backup device to recover your files or upload them from Google Drive or similar virtual storage. If you had no backups prepared, you can make use of third-party recovery applications or try using STOPDecrypter, a special tool that was crafted by security researcher Michael Gillespie. If nothing works, you should make a copy of your files and wait for other tools to be created for this particular version of STOP ransomware.

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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.
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 Gerosan virus, follow these steps:

Remove Gerosan using Safe Mode with Networking

Before you proceed with the file recovery process, you need to ensure a full Gerosan ransomware removal. If the virus is tampering with your security software, access Safe Mode environment as explained below:

  • 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 Gerosan

    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 Gerosan removal.

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

Remove Gerosan using System Restore

An alternative way to delete the virus is by using 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 Gerosan. 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 Gerosan removal is performed successfully.

Bonus: Recover your data

Guide which is presented above is supposed to help you remove Gerosan from your computer. To recover your encrypted files, we recommend using a detailed guide prepared by 2-spyware.com security experts.

You should avoid paying cybercriminals, even if your files are extremely important to you. Instead, make use of alternative data recovery methods we provide below.

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

Data Recovery Pro is a professional tool

This software might be capable of restoring at least some of your data:

  • 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 Gerosan ransomware;
  • Restore them.

Windows Previous Versions feature might be useful when trying to recover files encrypted by Gerosan

This method could allow you to retrieve files one-by-one if you had System Restore enabled before the virus struck.

  • 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 is valuable in some situations

If you were lucky and the ransomware failed to delete Shadow Volume Copies, you can use ShadowExplorer to retrieve your data.

  • Download Shadow Explorer (http://shadowexplorer.com/);
  • 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.

Try STOPDecrypter to restore your files

Download STOPDecrypter [download link] – it might work for certain versions of STOP ransomware.

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

About the author

Gabriel E. Hall
Gabriel E. Hall - Passionate web researcher

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