How to remove Gesd ransomware form the operating system?

Also Known As: Gesd virus
Distribution: Low
Damage level: Severe

Gesd ransomware removal instructions

What is Gesd?

Gesd is a piece of malicious software, belonging to the Djvu ransomware family. Credit for discovery belongs to Michael Gillespie. Devices infected with this malware - have their data encrypted by it. The purpose is for the cyber criminals behind the infection to then demand payment (ransom) for decryption tools/software. As Gesd encrypts data, all affected files are retitled with the ".gesd" extension. For example, a filename like "1.jpg" would appear as "1.jpg.gesd", and so forth. After this process is complete, a text file named "_readme.txt" is dropped into every compromised folder.

The text file contains the ransom note, which informs users that their data has been encrypted with strongest encryption and unique key. It reassures victims that the encrypted files are not lost and they can be retrieved. It claims that the only way of recovery is is to purchase decryption tools/keys from developers of Gesd. Free decryption of one file is offered as proof that it is possible. However this file cannot contain valuable information, likely implying that it must not be a database, backup, larger excel sheet and similar. The price of the necessary decryption tools is stated to be $980. This sum can be halved, should users contact the individuals behind the ransomware within 72 hours. Victims are told to establish contain via email. If a response from the criminals does not arrive in 6 hours, users can try checking their "Spam/Junk" email folders for it. Unfortunately, in most cases of such infections - decryption with third party decryption software is impossible. It may be a viable solution, if the malicious program in question is still in development and/or has certain flaws/bugs. Regardless, it is expressly advised against contacting and/or paying cyber criminals. Often, despite meeting the ransom demands - victims do not receive the promised tools/keys. Therefore, their files remain encrypted and worthless. To prevent Gesd from further encryptions, it is necessary to remove it from the operating system. However, removal will not restore already encrypted data. The only solution is recovering it from a backup. Provided, if a backup was made prior to the infection and was stored in different location.

Screenshot of a message encouraging users to pay a ransom to decrypt their compromised data:

Gesd decrypt instructions (_readme.txt)

Ransomware is designed to encrypt files and to demand a ransom to be paid for decryption. There are some key differences, such as the cryptographic algorithm (symmetric or asymmetric) used for the encryption and the size of the requested payment. Typically, ransoms range between three and four digits (in USD). Digital currencies (primarily, cryptocurrencies) are used for these payments, this is due to the transactions being difficult/impossible to trace. MMDecrypt, Righ, NEMTY 2.2 REVENGE, Tor+ are a few examples of other ransomware. Backups are recommended to ensure data safety. They should be kept in unplugged storage devices and/or remote servers. Ideally, several backup copies should be stored in different locations.

How did ransomware infect my computer?

The main proliferation modes of ransomware and other malware include - spam campaigns, trojans, untrustworthy download channels, illegal program activation ("cracking") tools and fake updaters. Spam campaign is a term used to describe deceptive emails sent on a mass scale. Usually, the letters are disguised as "official", "important", "priority", etc. and they contain infectious attachments (or links leading to virulent files). The attachments come in a variety of formats (e.g. archive and executable files, PDF and Microsoft Office documents, JavaScript and so on), when these files are opened - it initiates the infection. In other words, once they are run, executed or otherwise opened - they are triggered to start downloading/installing malware. Trojans are malicious programs, capable of causing chain infections. Peer-to-Peer sharing networks (BitTorrent, eMule, Gnutella, etc.), unofficial and free file-hosting websites, third party downloaders and similar sources are considered to be untrustworthy. Unreliable download channels are far more likely to offer malicious content for downloading (e.g. under the guise of ordinary products and/or bundled with them). Rather than activating licensed software, illegal activation tools ("cracks") can download/install malware. Fake updaters infect systems by abusing weaknesses of outdated programs and/or install malware instead of the promised updates.

Threat Summary:
Name Gesd virus
Threat Type Ransomware, Crypto Virus, Files locker
Detection Names Avast (FileRepMalware), BitDefender (Trojan.GenericKD.42095141), ESET-NOD32 (A Variant Of Win32/GenKryptik.DZOZ), Kaspersky (Trojan.Win32.Agent.xacsxr), Full List (VirusTotal)
Encrypted Files Extension .gesd
Ransom Demanding Message _readme.txt
Ransom Amount $980/$490
Cyber Criminal Contact helprestore@firemail.cc and datarestore@iran.ir
Symptoms Cannot open files stored on your computer, previously functional files now have a different extension (for example, my.docx.locked). A ransom demand message is displayed on your desktop. Cyber criminals demand payment of a ransom (usually in bitcoins) to unlock your files.
Additional Information This malware is designed to show a fake Windows Update window and modify the Windows "hosts" file to prevent users from accessing cyber security websites (more information below).
Distribution methods Infected email attachments (macros), torrent websites, malicious ads, unofficial activation and updating tools.
Damage All files are encrypted and cannot be opened without paying a ransom. Additional password-stealing trojans and malware infections can be installed together with a ransomware infection.
Removal

To eliminate Gesd virus our malware researchers recommend scanning your computer with Spyhunter.
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Free scanner checks if your computer is infected. To remove malware, you have to purchase the full version of Spyhunter.

How to protect yourself from ransomware infections?

Suspicious and/or irrelevant emails should not be opened. Any attachments (or links) present in suspect mail - must never be opened, as these files are the origin of a potential infection. It is advised to only use official and verified download sources. Software should be activated and updated using functions/tools, provided by legitimate developers. Illegal activation tools ("cracks") and third party updaters carry a high risk of malware installation; therefore, they should not be used. It is paramount to have a dependable anti-virus/anti-spyware suite installed and updated. Furthermore, these programs are to be used for regular system scans and removal of detected threats/issues. If your computer is already infected with Gesd, we recommend running a scan with Spyhunter for Windows to automatically eliminate this ransomware.

Text presented in Gesd ransomware's text file ("_readme.txt"):

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:
hxxps://we.tl/t-063L4ferhE
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:
helprestore@firemail.cc

Reserve e-mail address to contact us:
datarestore@iran.ir

Your personal ID:
-

Screenshot of files encrypted by Gesd (".gesd" extension):

Files encrypted by Gesd ransomware (.gesd extension)

Screenshot of fake Windows update pop-up displayed during the encryption:

Fake Windows pop-up displayed by Gesd during the encryption

IMPORTANT NOTE! - As well as encrypting data, ransomware-type infections from the Djvu malware family also add a number of entries to the Windows "hosts" file. The entries contain URLs of various websites, most of which are related to malware removal. This is done to prevent users from accessing malware security websites and seeking help. Our website (PCrisk.com) is also on the list. Removing these entries, however, is simple - you can find detailed instructions in this article (note that, although the steps are shown in the Windows 10 environment, the process is virtually identical on all versions of the Microsoft Windows operating system).

Screenshot of websites added to Windows hosts file:

Tro Ransomware adding websites to Windows Hosts file

There are currently two versions of Djvu ransomware infections: old and new. The old versions were designed to encrypt data by using a hard-coded "offline key" whenever the infected machine had no internet connection or the server was timing out/not responding. Therefore, some victims were able to decrypt data using a tool developed by cyber security researcher, Michael Gillespie, however, since the encryption mechanism has been slightly changed (hence the new version, released in August, 2019), the decrypter no longer works and it is not supported anymore. If your data has been encrypted by an older version, you might be able to restore it with the another tool developed by Emsisoft and Michael Gillespie. It supports a total of 148 Djvu's variants and you can find more information, as well as download link and decryption instructions in Emsisoft's official page.

Screenshot of Djvu decryption tool by Emsisoft and Michael Gillespie:

Djvu ransomware decrypter by Michael Gillespie and Emsisoft

Additionally, Emsisoft is now providing a service that allows to decrypt data (again, only if it was encrypted by Djvu variants released before August, 2019) for those victims who have a pair of the same file before and after the encryption. All victims have to do is upload a pair of original and encrypted file to Emsisoft's Djvu decryption page and download the aforementioned decryption tool (the download link will be provided after uploading files). Note that the file processing may take some time so be patient. It is also worth mentioning that the system must have an Internet connection during the entire decryption process, otherwise it will fail.

Screenshot of Emsisoft's Djvu decryption service page:

Djvu ransomware decryption service by Emsisoft

Gesd ransomware removal:

Instant automatic removal of Gesd virus: Manual threat removal might be a lengthy and complicated process that requires advanced computer skills. Spyhunter is a professional automatic malware removal tool that is recommended to get rid of Gesd virus. Download it by clicking the button below:
▼ DOWNLOAD Spyhunter By downloading any software listed on this website you agree to our Privacy Policy and Terms of Use. Free scanner checks if your computer is infected. To remove malware, you have to purchase the full version of Spyhunter.

Quick menu:

Step 1

Windows XP and Windows 7 users: Start your computer in Safe Mode. Click Start, click Shut Down, click Restart, click OK. During your computer start process, press the F8 key on your keyboard multiple times until you see the Windows Advanced Option menu, and then select Safe Mode with Networking from the list.

Safe Mode with Networking

Video showing how to start Windows 7 in "Safe Mode with Networking":

Windows 8 users: Start Windows 8 is Safe Mode with Networking - Go to Windows 8 Start Screen, type Advanced, in the search results select Settings. Click Advanced startup options, in the opened "General PC Settings" window, select Advanced startup. Click the "Restart now" button. Your computer will now restart into the "Advanced Startup options menu". Click the "Troubleshoot" button, and then click the "Advanced options" button. In the advanced option screen, click "Startup settings". Click the "Restart" button. Your PC will restart into the Startup Settings screen. Press F5 to boot in Safe Mode with Networking.

Windows 8 Safe Mode with networking

Video showing how to start Windows 8 in "Safe Mode with Networking":

Windows 10 users: Click the Windows logo and select the Power icon. In the opened menu click "Restart" while holding "Shift" button on your keyboard. In the "choose an option" window click on the "Troubleshoot", next select "Advanced options". In the advanced options menu select "Startup Settings" and click on the "Restart" button. In the following window you should click the "F5" button on your keyboard. This will restart your operating system in safe mode with networking.

windows 10 safe mode with networking

Video showing how to start Windows 10 in "Safe Mode with Networking":

Step 2

Log in to the account infected with the Gesd virus. Start your Internet browser and download a legitimate anti-spyware program. Update the anti-spyware software and start a full system scan. Remove all entries detected.

If you cannot start your computer in Safe Mode with Networking, try performing a System Restore.

Video showing how to remove ransomware virus using "Safe Mode with Command Prompt" and "System Restore":

1. During your computer start process, press the F8 key on your keyboard multiple times until the Windows Advanced Options menu appears, and then select Safe Mode with Command Prompt from the list and press ENTER.

Boot your computer in Safe Mode with Command Prompt

2. When Command Prompt mode loads, enter the following line: cd restore and press ENTER.

system restore using command prompt type cd restore

3. Next, type this line: rstrui.exe and press ENTER.

system restore using command prompt rstrui.exe

4. In the opened window, click "Next".

restore system files and settings

5. Select one of the available Restore Points and click "Next" (this will restore your computer system to an earlier time and date, prior to the Gesd ransomware virus infiltrating your PC).

select a restore point

6. In the opened window, click "Yes".

run system restore

7. After restoring your computer to a previous date, download and scan your PC with recommended malware removal software to eliminate any remaining Gesd ransomware files.

To restore individual files encrypted by this ransomware, try using Windows Previous Versions feature. This method is only effective if the System Restore function was enabled on an infected operating system. Note that some variants of Gesd are known to remove Shadow Volume Copies of the files, so this method may not work on all computers.

To restore a file, right-click over it, go into Properties, and select the Previous Versions tab. If the relevant file has a Restore Point, select it and click the "Restore" button.

Restoring files encrypted by CryptoDefense

If you cannot start your computer in Safe Mode with Networking (or with Command Prompt), boot your computer using a rescue disk. Some variants of ransomware disable Safe Mode making its removal complicated. For this step, you require access to another computer.

To regain control of the files encrypted by Gesd, you can also try using a program called Shadow Explorer. More information on how to use this program is available here.

shadow explorer screenshot

To protect your computer from file encryption ransomware such as this, use reputable antivirus and anti-spyware programs. As an extra protection method, you can use programs called HitmanPro.Alert and EasySync CryptoMonitor, which artificially implant group policy objects into the registry to block rogue programs such as Gesd ransomware.

Note that Windows 10 Fall Creators Update includes a "Controlled Folder Access" feature that blocks ransomware attempts to encrypt your files. By default, this feature automatically protects files stored in the Documents, Pictures, Videos, Music, Favorites, and Desktop folders.

Controll Folder Access

Windows 10 users should install this update to protect their data from ransomware attacks. Here is more information on how to get this update and add an additional protection layer from ransomware infections.

HitmanPro.Alert CryptoGuard - detects encryption of files and neutralises any attempts without need for user-intervention:

hitmanproalert ransomware prevention application

Malwarebytes Anti-Ransomware Beta uses advanced proactive technology that monitors ransomware activity and terminates it immediately - before reaching users' files:

malwarebytes anti-ransomware

  • The best way to avoid damage from ransomware infections is to maintain regular up-to-date backups. More information on online backup solutions and data recovery software Here.

Other tools known to remove Gesd ransomware:

About the author:

Tomas Meskauskas

Tomas Meskauskas - expert security researcher, professional malware analyst.

I am passionate about computer security and technology. I have an experience of over 10 years working in various companies related to computer technical issue solving and Internet security. I have been working as an author and editor for pcrisk.com since 2010. Follow me on Twitter and LinkedIn to stay informed about the latest online security threats. Contact Tomas Meskauskas.

PCrisk security portal is brought by a company RCS LT. Joined forces of security researchers help educate computer users about the latest online security threats. More information about the company RCS LT.

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Malware activity

Global malware activity level today:

Medium threat activity

Increased attack rate of infections detected within the last 24 hours.

QR Code
Gesd virus QR code
A QR code (Quick Response Code) is a machine-readable code which stores URLs and other information. This code can be read using a camera on a smartphone or a tablet. Scan this QR code to have an easy access removal guide of Gesd virus on your mobile device.
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