Protect your system from infection by GoRansom PoC ransomware

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

GoRansom PoC ransomware removal instructions

What is GoRansom PoC?

Discovered by GrujaRS, GoRansom PoC is a malicious program classified as ransomware. Typically, programs of this type prevent victims from accessing their files by encrypting them with strong encryption algorithms. To regain access, victims must pay a ransom (purchase a decryption tool) from the cyber criminals who designed the program. In fact, this ransomware differs, since GoRansom PoC developers do not demand to be paid. It encrypts files, renames them by adding the ".gore" extension (for example, "1.jpg" becomes "1.jpg.gore"), and creates a text file named "GoRansom.txt".

The "GoRansom.txt" text file states that the decryption key that can supposedly unlock files is "hardcoded in the binary" and there are only 255 possible keys. It is unknown exactly what cyber criminals mean by this statement, however, it seems that they suggest victims try to decrypt files manually. It is likely that they launched this ransomware simply to test it. Unfortunately, they might launch an upgraded version and force victims to pay a ransom. In any case, cyber criminals/ransomware developers should never be trusted, since they often provide no decryption tools and/or keys even if their demands are met. Furthermore, most ransomware-type programs perform encryptions that are uncrackable. Therefore, the only way to decrypt files is to use a tool held only by the cyber criminals who designed ransomware. In most cases, the only free way to recover files without having to pay ransoms or contact cyber criminals is to restore them from an 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 online. Some examples are StuardRitchi, encryptedRSA, and WannaCash. Typically, these programs share two similarities: they encrypt data and ensure that victims cannot access their files unless they purchase a tool/key from cyber criminals. Common differences are cost of decryption and cryptographic algorithm (symmetric or asymmetric) used to encrypt data. Only the ransomware developers have tools/keys and it is impossible to decrypt files without their help, unless the ransomware is incomplete or contains bugs/flaws, etc. To avoid possible data and/or financial loss caused by ransomware, have your data backed up and store it on a remote server or unplugged storage device.

How did ransomware infect my computer?

Many cyber criminals try to trick people into installing ransomware and other malware through spam campaigns, unofficial updating tools, dubious software download channels, unofficial software activation tools, and other malicious programs categorized as Trojans. Using spam campaigns, they send emails that include malicious attachments or website links that lead to malicious files. Attached files are usually Microsoft Office documents, archive files (ZIP, RAR, and others), PDF documents, JavaScript files, executable files such as .exe files, and so on. When opened, these attachments install malicious software - in this case, ransomware. Another way to proliferate malware is using fake software updaters. If used to update software, these download and install malware rather than updates, or they exploit bugs/flaws of outdated software installed on the computer. Untrustworthy software download channels upload malicious files and trick people into downloading them by disguising them as legitimate. When downloaded and opened, these files infect computers with a malicious program. Examples of sources used to download dubious software are Peer-to-Peer networks such as torrent clients, eMule, free file hosting, freeware download websites, unofficial websites, and other similar channels. Software 'cracking' tools supposedly activate licensed software free of charge, however, rather than activating any software, these tools download and install ransomware-type or other malicious software. Trojans are malicious programs that, if installed, proliferate other software of this kind.

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 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 Cyber criminals do not provide any details about how to contact them and suggest victims decrypt files manually. This ransomware is likely to be 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.
Malware Removal (Windows)

To eliminate possible malware infections, scan your computer with legitimate antivirus software. Our security researchers recommend using Malwarebytes.
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How to protect yourself from ransomware infections

To avoid having computer infections with malware, do not trust emails that are irrelevant and/or emails that are received from unknown, suspicious addresses. If an email of this type contains a web link or attachment, it should not be opened. Furthermore, unofficial software activation tools are illegal and can proliferate malware - do not activate any software with them. The same applies to update of installed programs. Update them through implemented functions or tools provided by official software developers. The only trustworthy download channels are official websites. The other tools mentioned above can be used to distribute malicious files/programs. Have reputable anti-virus or anti-spyware software installed and scan the operating system with it regularly. This software should also be updated regularly. If your computer is already infected with GoRansom PoC, we recommend running a scan with Malwarebytes for Windows to automatically eliminate this ransomware.

Text presented in GoRansom PoC ransomware 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 an email to us stating that he is providing a free decryption tool and a bruteforce tool, which can supposedly help victims to restore their data. These tools can be found in the developer's GitHub page (click here). Please note that we are not responsible for the possible consequences (e.g., additional security issues) of using these tools. I.e., you use them at your own risk.

GoRansom PoC ransomware removal:

Instant automatic malware removal: Manual threat removal might be a lengthy and complicated process that requires advanced computer skills. Malwarebytes is a professional automatic malware removal tool that is recommended to get rid of malware. Download it by clicking the button below:
▼ DOWNLOAD Malwarebytes By downloading any software listed on this website you agree to our Privacy Policy and Terms of Use. To use full-featured product, you have to purchase a license for Malwarebytes. 14 days free trial available.

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 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 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 malware activity level today:

Medium threat activity

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

QR Code
GoRansom PoC virus QR code
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