Uninstall DUMB ransomware and Recover Encrypted Files

Investigation Report on DUMB ransomware

 

DUMB ransomware, a cryptomalware has been coded by Alfur – a member of GitHub registered under AlphaDelta nick name. The ransomware is coded into C# programming language and presented as a fast ransomware evidence of concept. During initial research, we found that DUMB ransomware appears to be created just for fun cause developers borrowed the codes from DUMB project and built Ramsomeer Cryptomalware. This ransomware has an user friendly interface but it displays needful information in two languages – English and Turkish. Though, it won’t be false, if we say the both ransomware is relevant to each other.

Furthermore, speaking of DUMB cryptomalware, it encodes your saved files using XOR pad generated via ISAAC CSPRNG instead using usual AES or RSA open source encryption standard. Surprisingly, the ransomware easily encrypts files larger than 4GB in size on the compromised Windows PC. These files can be unlocked using simple trick – you need to terminate ‘Main’ program that DUMB ransomware launches each time Windows starts. When it comes to ransom note, it inform that your files have been encrypted, in 48 hours the decryption key will be deleted from unless you deposit 100 didgeridoos into their private didgeridoos wallet with the heading ‘You have been stuck with DUMB’.

Experts’ suggestion to the victims of DUMB ransomware

First things first, if you are thinking that after ransom pay off, DUMB Ransomware attackers would provide you a working files decryption key then beware. Most of the victims have reported that either decryption key isn’t working or after getting paid they didn’t send any decryption key. Actually, they are con artists and cyber criminals, they just don’t care about what ever is happening with you. You can not take any legal action against them because of the lacks of evidence against the attacker.

Hence, security experts advises victims to utilize some alternative file recovery options like System Restore Point and Data Recovery software. System restore point allows you to restore your affected PC settings and files to an earlier date when your computer was not infected with DUMB Ransomware and files were not encrypted. While Data recovery software allows you to recover your files from local disk and removable drives easily. Above all, you are also advised to keep multi-layered security provider software installed on your PC if you want your important files to be safe.

What to do next?

Before utilizing data recovery options, you have to completely delete DUMB ransomware from your computer using either automatic or manual removal process. Manual process is for tech-person and Automatic removal is for inexperienced computer users. Though, follow the guide to delete DUMB Ransomware:

 

Helpful Video Removal Guide To Get Rid of DUMB ransomware

Free Scan your Windows PC to detect DUMB ransomware

Remove DUMB ransomware From Your PC

Step 1: Remove DUMB ransomware in Safe Mode with Command Prompt

• First of all disconnect your PC with network connection.
• Click restart button and keep pressing F8 key regularly while system restart.

• You will see “Windows Advanced Options Menu” on your computer screen.

• Select “Safe Mode with Command Prompt” and press Enter key.

• You must login your computer with Administrator account for full privilege.

• Once the Command Prompt appears then type rstrui.exe and press Enter

• Now follow the prompts on your screen to complete system restore.

Step 2: Remove DUMB ransomware using MSConfig in Safe Mode:

• Power off your computer and restart again.
• While booting press the “F8 key” continuously to open “Windows Advanced Options Menu”.

• Use the arrow keys to select “Safe Mode” option and press Enter key.

• Once system get started go to Start menu. Type “msconfig” in the search box and launch the application.

• Go to the Startup tab and look for files from %AppData% or %Temp% folders using rundll32.exe. See an example below:

C:\Windows\System32\rundll32.exe C:\Users\username\appdata\local\temp\regepqzf.dll,H1N1

• Disable all the malicious entries and save the changes.
• Now restart your computer normally.

Step 3 : Kill Malicious Process Related To DUMB ransomware

• Press Alt+Ctrl+Del buttons together.

• It will open the Task manager on your screen.
• Go to Process Tab and find DUMB ransomware related process.
• Click the End Process Now button to stop the running process.

Step 4 : Remove DUMB ransomware Virus From Registry Entry

• Press “Windows + R” key together to open Run Box.

• Type “regedit” and click OK button.

• Find and remove DUMB ransomware related entries.

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnceEx

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\RunServices

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\RunServicesOnce

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run

HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run

HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Runonce

HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\RunServices

HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\RunServicesOnce

HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run

Now hopefully you have completely removed the DUMB ransomware virus from your computer. If you are still get ransom message from the threat or unable to access your files, then it means that virus still remain into your computer. In such situation you don’t have any other option except removing this virus using any powerful malware removal tool.

Whereas if you have any backup of your infected or encrypted files, then you can also reinstall your Windows OS. This will erase all your files and data as along with the DUMB ransomware infection. You will get a completely empty computer system with no files. Now you can use your backup to get your files. If you don’t have any backup then using malware removal tool is a better option for you.

If you have any query or question regarding your computer, then you can easily ask your problem to our experts. Go to the Ask Any Question page and get the answer for your query directly from out experts.