GusCrypter Ransomware

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

GusCrypter ransomware removal instructions

What is GusCrypter?

GusCrypter virus is a high-risk ransomware-type virus that was discovered by S!Ri. Once it has infiltrated, the virus encrypts most files stored on the system, rendering them unusable. GusCrypter adds the ".GUSv2" extension to every affected file. For example, after encryption, "sample.jpg" is renamed to "sample.jpg.GUSv2", and so on. The GusCrypter virus also places the "DECRYPT.html" file in every folder that contains encrypted files.

When opened, "DECRYPT.HTML" displays a browser window that contains further information regarding the current situation following infection. GusCrypter developers claim that all files are locked, and to retrieve them, users must make contact using an email address provided. According to these cyber criminals, an email must be sent with the personal ID that was assigned to the individual user, who must then wait for a reply. Most ransomware-type developers/cyber criminals make ransom demands. In this case, to retrieve your files, you will be encouraged to transfer Bitcoins. Criminals associated with GusCrypter warn of the consequences if you try to decrypt the files manually. They state that, you might lose them permanently. No other information regarding the cryptography type used, size of ransom, or time limit for payment, is provided. Note, however, that cyber criminals should never be trusted. They often ignore victims, regardless of whether ransoms are paid or demands are met. Sending money (Bitcoins) to them will not result in decryption of your files. Unfortunately, there are no tools currently able to decrypt your files free of charge. The only possible way to retrieve compromised files is to restore them using a backup.

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

GusCrypter decrypt instructions

A few examples of other ransomware-type viruses similar to GusCrypter are Betta, SOLO, and Charm. These are just some examples from many more available. Generally, viruses are developed by different cyber criminals, but most ransomware-type viruses are very similar: their purpose is to encrypt files and make ransom demands. The only differences are the encryption algorithm used and size of ransom (usually in a cryptocurrency). Furthermore, most cyber criminals employ cryptographies that generate individual/unique decryption keys, thus manual decryption (without involvement of cyber criminals) is virtually impossible. Therefore, it is important to maintain periodic data backups. You are strongly advised to keep these stored on a remote server or unplugged storage device, otherwise cyber criminals might encrypt backups with regular data.

How did ransomware infect my computer?

It is difficult to determine exactly what causes infection by GusCrypter ransomware, however, common ways to distribute these viruses are via spam email campaigns, trojans, fake software update tools/software updaters, and untrustworthy (unofficial) software download sources. Spam email campaigns usually include malicious attachments, often Microsoft Office documents. If opened, these allow viruses to be proliferate - malware is downloaded and installed. Trojans are virus infections that are already present and cause chain infections. Therefore, they proliferate one virus using another. Various unofficial download sources such as P2P (peer-to-peer) networks, eMule, torrents, and so on, present malicious software as legitimate. Thus, users often install malware rather than trustworthy software. Fake software updaters often infect systems by exploiting bugs or flaws of outdated software or downloading (and installing) malware rather than updates or fixes.

Threat Summary:
NameGusCrypter virus
Threat TypeRansomware, Crypto Virus, Files locker
SymptomsCan't open files stored on your computer, previously functional files now have a different extension, for example my.docx.locked. A ransom demanding message is displayed on your desktop. Cyber criminals are asking to pay a ransom (usually in bitcoins) to unlock your files.
Distribution methodsInfected email attachments (macros), torrent websites, malicious ads.
DamageAll 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.

To eliminate GusCrypter 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?

Never open files (such as attachments) that seem suspicious or has been received from a suspicious/unkwnown email addresses. Download your applications from official sources only, using direct download links. Third party downloaders/installers should not be used, since they often include various rogue applications. The same applies to software updates. It is important to keep installed software and the entire operating system up-to-date, but use only implemented functions or tools provided by the official developers. Finally, have a reputable anti-virus/anti-spyware suite installed and keep it enabled. If your computer is already infected with GusCrypter, we recommend running a scan with Spyhunter for Windows to automatically eliminate this ransomware.

Text presented in GusCrypter ransomware text file :

YOUR PID: 512064768

Email us
Write your ID at title of mail and country at body of mail and wait answer.
You have to pay some bitcoins to unlock your files!

If you try to unlock your files, you may lose access to them!

No one can guarantee you a 100% unlock except us!
How to buy bitcoin

Screenshot of files encrypted by GusCrypter (".GUSv2" extension):

Files encrypted by GusCrypter

GusCrypter ransomware removal:

Instant automatic removal of GusCrypter 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 GusCrypter 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 GusCrypter 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 GusCrypter 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 GusCrypter 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 GusCrypter 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 GusCrypter, 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 GusCrypter 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 as well as 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 GusCrypter 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 since 2010. Follow me on Twitter and LinkedIn to stay informed about the latest online security threats. Contact Tomas Meskauskas.

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Malware activity

Global virus and spyware activity level today:

Medium threat activity

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

QR Code
GusCrypter 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 GusCrypter virus on your mobile device.
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Platform: Windows

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