How to avoid data loss caused by Decrypme ransomware

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

Decrypme ransomware removal instructions

What is Decrypme?

Decrypme is a new variant of MedusaLocker ransomware. This malicious program was discovered by dnwls0719. Like most ransomware-type programs, Decrypme is designed to prevent victims from accessing their files by encrypting them. Typically, it is impossible to decrypt files without specific tools (decryption software and/or keys). To obtain them, victims are forced to pay a ransom. Instructions about how to recover files are provided in the "HOW_TO_OPEN_FILES.html" file. This ransomware also appends the ".decrypme" extension to all encrypted files. For example, "1.jpg" becomes "1.jpg.decrypme".

The "HOW_TO_OPEN_FILES.HTML" file is opened in a browser window and states that it is possible to recover (decrypt) files with a decryption tool held only by the developers of Decrypme. To contact these cyber criminals, victims must send an email to mrromber@cock.li or mrromber@tutanota.com. The criminals should then provide instructions about how to make payment. Victims are asked to provide a personal ID and are offered free decryption of one file, which can be attached to the email message. They are warned not to attempt to decrypt files using third party tools, since this will cause permanent data loss. It is impossible to restore files without valid tools provided by the developers. Despite this, never trust or pay these people - they often send no decryption keys/software, even if victims meet all demands. Typically, the only way to recover files is to restore them from a backup created before the ransomware attack. Removal of this malware only prevents it from causing further encryption - all previously-encrypted files remain in this state.

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

Decrypme decrypt instructions

Most ransomware-type programs are all similar - they lock (encrypt) data and provide victims with instructions about how to pay ransoms and other details. Some examples of other software of this type include JayTHL, Nakw, and Xda. Main differences are usually cost of decryption software/key and cryptographic algorithm (symmetric or asymmetric) used to block access to data. Unfortunately, most of these programs perform encryption that is impossible to 'crack'. Therefore, victims cannot decrypt their files without tools held only by the cyber criminals (developers of specific ransomware). Typically, the only way to recover files free of charge is to restore them from a backup. Therefore, have your data backed up and store it on a remote server (Cloud) or unplugged storage device.

How did ransomware infect my computer?

Common ways to proliferate malicious programs are spam campaigns, Trojans, dubious file and software download channels, unofficial software activation tools and fake updaters. When cyber criminals use spam campaigns, they send emails that contain malicious attachments. They attach files such as Microsoft Office or PDF documents, archive files (ZIP, RAR), executable files (.exe) and JavaScript files. Their main aim is to trick recipients opening a malicious file that, once opened, installs high-risk malware. Trojan is a type of malware that causes chain infections: when installed, these programs install other malicious programs. Examples of dubious software download sources are websites that offer download of free software, free file hosting pages, Peer-to-Peer networks such as torrent clients, eMule, third party downloaders, unofficial pages, and others. Cyber criminals use them to proliferate malware by uploading malicious files disguised as legitimate and harmless. People who open files downloaded from/through these sources cause installation of malware, including ransomware. Unofficial software activation ('cracking') tools supposedly bypass paid activation of licensed software, however, they are often used to proliferate/install ransomware and other malware rather than activating already installed software. Unofficial updating tools infect operating systems by installing malicious programs rather than updating outdated software, or by exploiting bugs/flaws of already installed software.

Threat Summary:
Name Decrypme virus
Threat Type Ransomware, Crypto Virus, Files locker.
Encrypted Files Extension .decrypme
Ransom Demanding Message HOW_TO_OPEN_FILES.html
Cyber Criminal Contact mrromber@cock.li, mrromber@tutanota.com
Detection Names AVG (FileRepMetagen [Malware]), BitDefender (Gen:Heur.Ransom.Imps.1), ESET-NOD32 (A Variant Of Win32/Filecoder.MedusaLocker.C), Kaspersky (Trojan.Win32.DelShad.bmq), 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.
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

Do not download or install any programs or files using third party software downloaders, installers, or other such tools (other examples are provided above). The safest way is to use official and trustworthy websites. Update installed software through implemented functions or tools designed by official developers. Website links and/or files included in irrelevant emails should not be opened. Typically, these emails are sent from unknown, suspicious addresses and disguised as important, official. Licensed (paid) software should be activated properly. It is illegal to use third party ('cracking') tools and they often cause damage to computers by installing malware. Scan operating systems with reputable antivirus or anti-spyware software and keep it up-to-date. If your computer is already infected with Decrypme, we recommend running a scan with Malwarebytes for Windows to automatically eliminate this ransomware.

Appearance of "HOW_TO_OPEN_FILES.html" file (GIF):

decrypme ransomware appearance in gif

Text presented in this file:

All your data are encrypted!
What happened?
Your files are encrypted, and currently unavailable.
You can check it: all files on you computer has new expansion.
By the way, everything is possible to recover (restore), but you need to buy a unique decryptor.
Otherwise, you never cant return your data.

For purchasing a decryptor contact us by email:
mrromber@cock.li
If you will get no answer within 24 hours contact us by our alternate emails:
mrromber@tutanota.com

What guarantees?
Its just a business. If we do not do our work and liabilities - nobody will not cooperate with us.
To verify the possibility of the recovery of your files we can decrypted 1 file for free.
Attach 1 file to the letter (no more than 10Mb). Indicate your personal ID on the letter:
-
Attention!
- Attempts of change files by yourself will result in a loose of data.
- Our e-mail can be blocked over time. Write now, loss of contact with us will result in a loose of data.
- Use any third party software for restoring your data or antivirus solutions will result in a loose of data.
- Decryptors of other users are unique and will not fit your files and use of those will result in a loose of data.
- If you will not cooperate with our service - for us, its does not matter. But you will lose your time and data, cause just we have the private key.

Screenshot of files encrypted by Decrypme (".decrypme" extension):

Files encrypted by Decrypme

Decrypme 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 Decrypme 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 Decrypme 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 Decrypme 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 Decrypme 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 Decrypme, 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 Decrypme 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 Decrypme 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
Decrypme 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 Decrypme virus on your mobile device.
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