How to uninstall Gomer ransomware?

Also Known As: Gomer virus
Distribution: Moderate
Damage level: Severe

Gomer ransomware removal instructions

What is Gomer?

Gomer is a new variant of Outsider ransomware, it was discovered by dnwls0719. It renames encrypted files by appending the ".gomer" extension. For example, it changes a file named "1.jpg" to "1.jpg.gomer", "2.jpg" to "2.jpg.gomer". etc. Also, it drops the "GOMER-README.txt" text file (ransom note) in each folder that contains encrypted files.

As explained in the "GOMER-README.txt" ransom note, victims can decrypt encrypted files only with a certain decryption tool which can be purchased from Gomer's developers for a certain amount of money (Bitcoin cryptocurrency). Instructions on how to pay for a decryption tool can be received by writing an email to support-gomer@pm.me. As a proof that cyber criminals behind Gomer have the decryption tool they offer a free decryption of one encrypted file that can be sent to them via the provided email address. Unfortunately, there are no other tools that could be capable of decrypting files encrypted by Gomer, at least not at the moment. However, it is strongly recommended not to pay any money neither to Gomer's developers or any other cyber criminals behind such malware - it is because victims who trust them tend to get scammed, they do not receive a decryption tool and/or key even after a payment. In such cases the only way to recover files for free is to restore them from a backup. Also, malware like Gomer can be prevented from encrypting any unencrypted files by uninstalling it from the operating system. Although, files that are already encrypted remain encrypted even when ransomware is no longer installed.

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

Gomer decrypt instructions (GOMER-README.txt)

To sum up, ransomware is a type of malware that is designed to make sure that victims could not decrypt their files without having to purchase a decryption tool and/or key from its developers. Also, most programs of this type create and/or display some ransom note that contains instructions on how to contact their developers. Usually the only main variables are encryption algorithm (symmetric or asymmetric) that ransomware uses to encrypt data and size of a ransom. Most of the times decryptions without tools that only cyber criminals have are possible when ransomware has some bugs, flaws (it is not finished). Unfortunately, it does not happen often. Therefore, it is recommended to always have data backed up and keep it stored on a remote server (e.g., Cloud) and/or unplugged storage device. A couple of examples of other ransomware are Dungeon, Vawe and Base.

How did ransomware infect my computer?

In most cases users infect computers with malware through spam campaigns, Trojans, fake software updaters, questionable software download sources/channels and unofficial updaters ('cracking' tools). It is common that cyber criminals attempt to trick users into installing malware by sending emails that contain malicious attachments or web links designed to download malicious files. Malware installation is caused when users execute/open a malicious file. Some examples of files that cyber criminals attach to their emails are malicious Microsoft Office, PDF documents, archive files (like RAR, ZIP), executable files (.exe), and JavaScript files. Trojans are malicious programs that infect computers by simply installing some other malware. In other words, programs of this type often are designed to cause chain infections. Fake (unofficial) updaters cause damage by installing malicious programs instead of the updating installed software. Also, they can designed cause it by exploiting bugs, flaws of outdated software that is installed on the operating system. Examples of questionable software download channels are Peer-to-Peer networks like torrent clients, eMule, free file hosting websites, freeware download pages, third party downloaders. Cyber criminals attempt to trick users into installing malware by disguising malicious files as regular, harmless. When users download and execute them, they cause installation of malicious software. Software 'cracking' tools are programs that supposed to bypass activation of certain licensed software. Although, quite often they not activate any software and install some malicious software, e.g., ransomware instead.

Threat Summary:
Name Gomer virus
Threat Type Ransomware, Crypto Virus, Files locker
Encrypted Files Extension .gomer
Ransom Demanding Message GOMER-README.txt
Cyber Criminal Contact support-gomer@pm.me
Detection Names Avast (FileRepMetagen [Malware]), BitDefender (Gen:Variant.Fugrafa.14822), ESET-NOD32 (A Variant Of Win32/Filecoder.Outsider.H), Kaspersky (HEUR:Trojan.Win32.Generic), Full List Of Detections (VirusTotal)
Rogue Process Name Edab Service (its name may vary)
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.
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?

Software should be downloaded only from official pages and via direct links. Other sources, channels that are mentioned in the previous paragraph should not be trusted.  Operating system and software that is installed on it must be updated with implemented functions and/or tools that are designed by the official software developers. Various unofficial tools often are used by cyber criminals as tools to proliferate various malware. Besides, it is not legal to activate licensed software with various third party tools ('cracking' tools/activators). Attachments and/or links in irrelevant emails that are received from suspicious, unknown addresses should not be opened: it is common that such emails are sent by cyber criminals who attempt to trick recipients into installing malware. It is worthwhile to mention that such emails often are disguised as important, official, and so on. And finally, any operating system is safer if it is being regularly scanned with a reputable antivirus or anti-spyware software. If your computer is already infected with Gomer, we recommend running a scan with Malwarebytes for Windows to automatically eliminate this ransomware.

Text presented in Gomer ransomware's text file ("GOMER-README.txt"):

!   ATTENTION   !

----------------------------------

! STRICTLY FORBIDDEN TO USE THIRD-PARTY DECRYPTION SOFTWARE - FILES WILL BE LOST !

----------------------------------

Due vulnerability in your system all files have been protected with strong private key to safe them from unathorized access.

To RESTORE your files, follow this instructions:

1. Gomer service charges a payment for file decryption tool

2. Contact us with attached Gomer-readme.txt

3. Receive Gomer file decryption tool

4. Run the tool and successfully RESTORE all your files!

We guarantee:

100% Successful restoring all of your files

100% Satisfaction guarantee

100% Fast and secure service

As a proof of our trusted service, you can send us 1 file and get it decrypted for free!

----------------------------------

! ONLY ORIGINAL GOMER DECRYPTION TOOL CAN RESTORE YOUR FILES !  

----------------------------------

Contacts: support-gomer@pm.me

Payments accepted: Bitcoin (BTC)

ID KEY:
-
~ GOMER ~
=

Screenshot of files encrypted by Gomer (".gomer" extension):

Files encrypted by Gomer ransomware (.gomer extension)

Malicious Gomer's ("Edab Service") process running in Task Manager (its name may vary):

gomer edab service malicious process in task manager

Update June 26, 2020 - CERT Polska has recently discovered a way to decrypt data encrypted by Gomer ransomware for free. Thus, those who need help can contact them asking for help.

Gomer 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:
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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 Gomer 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 Gomer 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 Gomer 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 Gomer 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 Gomer, 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 Gomer 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 Gomer 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
Gomer virus QR code
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