Keep systems safe from being infected with GoRansom PoC ransomware

Also Known As: GoRansom PoC virus
Distribution: Low
Damage level: Severe

GoRansom PoC ransomware removal instructions

What is GoRansom PoC?

GoRansom PoC is a malicious program that is classified as ransomware. Typically, programs of this type prevent victims from accessing their files by encrypting them with strong encryption algorithms. In order to be able to access them, victims must pay a ransom/purchase a decryption tool from cyber criminals who designed the program. However, this ransomware is different because GoRansom PoC developers do not demand to be paid. It encrypts files, renames them by adding the ".gore" extension (for example, it renames "1.jpg" to "1.jpg.gore", and so on), and creates a text file named "GoRansom.txt". This ransomware-type program was discovered by GrujaRS.

As stated in the "GoRansom.txt" text file, decryption key that supposed to unlock files is hardcoded in the binary and there are only 255 possible keys. It is unknown what exactly these cyber criminals mean by that, but it seems that they suggest victims to try to decrypt files by themselves. It is very likely that they launched this ransomware only to test it. Unfortunately, they might launch an upgraded version and force victims to pay them a ransom. Either way, it is worth mentioning that cyber criminals/ransomware developers should not be trusted, quite often they do not provide decryption tools or/and keys even if all their demands are met. Another problem is that mot ransomware-type programs are designed to perform encryptions that are uncrackable. In other words, the only way to decrypt files usually is to use a tool that can be provided only by cyber criminals who designed ransomware. In most cases the only free way to recover files without having to pay any money or contact cyber criminals is to restore them from a created (existing) backup.

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

GoRansom PoC decrypt instructions

There are many ransomware-type programs out there, a couple of examples are StuardRitchi, encryptedRSA and WannaCash. Typically, these programs share two main similarities: they are designed to encrypt data and make sure that victims could not access their files unless they buy a tool or/and key from cyber criminals. Two main and most common differences are price of decryption and cryptographic algorithm (symmetric or asymmetric) that is used to encrypt data. Most of the times the only people who have the right tools/keys are ransomware developers and it is impossible to decrypt files without their help, unless ransomware is not finished/contains bugs, flaws, etc. In order to be able to avoid possible data and/or financial loss caused using ransomware we advise to always have data backed up and store it on a remote server or unplugged storage device.

How did ransomware infect my computer?

Most cyber criminals try to trick people into installing ransomware and other malware through spam campaigns, unofficial updating tools, questionable software download channels, unofficial software activation tools and other malicious programs that are categorized as Trojans. To infect systems through spam campaigns they send emails that include malicious attachments or website links that lead to malicious files. Attached files usually are Microsoft Office documents, archive files (like ZIP, RAR and others), PDF documents, JavaScript files, executable files like .exe files, and so on. When opened, these attachments install malicious software, in this case ransomware. Another way to spread malware is using fake software updaters. If used to update software, they download and install malware instead of updates, or exploit bugs, flaws of outdated software that is installed on a computer. Untrustworthy software download channels are used to upload malicious files and trick people into downloading them by disguising them as legitimate. When downloaded and opened, these files infect computers with one or another malicious program. Some examples of unreliable sources to download software are Peer-to-Peer networks like torrent clients, eMule, various free file hosting, freeware download websites, unofficial websites and other similar channels. Software 'cracking' tools supposed to activate licensed software for free. Nevertheless, instead of activating it these tools can download and install ransomware-type or other malicious software. Trojans are malicious programs that, if installed on a system, spread other software of this kind. However, Trojans are dangerous only when they are installed on the system.

Threat Summary:
Name GoRansom PoC virus
Threat Type Ransomware, Crypto Virus, Files locker
Encrypted Files Extension .gore
Ransom Demanding Message GoRansom.txt
Ransom Amount GoRansom PoC developers do not ask for a ransom.
Detection Names Avast (FileRepMetagen [Malware]), BitDefender (Gen:Variant.Razy.546521), McAfee (Artemis!5A22AB886F3F), Microsoft (Ransom:Win32/Genasom), Full List Of Detections (VirusTotal)
Symptoms Can'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.
Additional Information Cyber criminals do not provide any details on how to contact them and suggest victims to decrypt files by themselves. This ransomware is very likely to be still in development/test mode.
Distribution methods Infected email attachments (macros), torrent websites, malicious ads.
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 GoRansom PoC virus our malware researchers recommend scanning your computer with Spyhunter.
▼ Download Spyhunter
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?

To avoid having a computer infected with various malware, we recommend not to trust emails that are irrelevant, or/and emails that are received from unknown, suspicious addresses. If an email of this type contains some web link or attachment, it should not be opened. Furthermore, unofficial software activation tools are not legal and can be used to spread malware, it is strongly recommended not to activate any software with them. The same applies to updating of installed programs. They should be updated through implemented functions or tools that are provided by official software developers. The only trustworthy download channels are official websites. Other tools that we mentioned above can be used to distribute malicious files/programs. And finally, it is important to have a reputable anti-virus or anti-spyware software installed and scan the operating system with it regularly. Besides, software of this type should be updated regularly too. If your computer is already infected with GoRansom PoC, we recommend running a scan with Spyhunter for Windows to automatically eliminate this ransomware.

Text presented in GoRansom PoC ransomware's text file ("GoRansom.txt"):

Files have been encrypted by The GoRansom POC Ransomware.
  Decryption Key is hardcoded in the binary.
  Uses XOR encryption with an 8bit (byte) key.
  Only 255 possible keys.
  Run the ransomware in the command line with one argument, decrypt.
  Example: GoRansom.exe decrypt

Screenshot of files encrypted by GoRansom PoC (".gore" extension):

Files encrypted by GoRansom PoC

Update September 23, 2019 - The developer of GoRansom PoC ransomware sent us an email stating that he's providing a free decryption tool and a bruteforce tool which supposedly can help victims restore their data. These tools can be found in developer's GitHub page (click here). However, we must note that we are not responsible for the possible consequences (e.g., tools causing additional security issues) of using these tools. In other words, use them at your own risk.

GoRansom PoC ransomware removal:

Instant automatic removal of GoRansom PoC 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 GoRansom PoC 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 GoRansom PoC 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 GoRansom PoC 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 GoRansom PoC 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 GoRansom PoC 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 GoRansom PoC, 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 GoRansom PoC ransomware.

Note that Windows 10 Fall Creators Update includes "Controlled Folder Access" feature that blocks ransomware attempts to encrypt your files. By default this feature automatically protects files stored in 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's more information on how to get this update and add 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 GoRansom PoC 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 virus and spyware activity level today:

Medium threat activity
Medium

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

QR Code
GoRansom PoC virus QR code
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Platform: Windows

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