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OhNo! ransomware virus. How to remove? (Uninstall guide)

removal by Julie Splinters - - | Type: Ransomware
12

OhNo! ransomware is after your files

The screenshot of OhNo! message

OhNo! virus operates as ransomware which is designed to encode files. Currently, it is still under development as not all samples of the malware encrypt data. Nonetheless, the virus appends .ohno file extension. It still manages to infiltrate systems and demands ransom. Here are the key features of the threat: 

  • functions via GoogleChrome.exe
  • opens Mount Point Manager
  • deletes certain files[1]
  • asks ransom in XMR currency (Monero)
  • detectable as Trojan.Ransom.OhNo, Trojan.Win32.Generic.pak!cobra, Ransom_CRYPTOLOCKER.USDL, etc

Though the virus does not function at its full power, remove OhNO! virus right away. Reimage or Malwarebytes Anti Malware will be helpful in this situation.

Misleading veneer?

While the virtual infection does not operate as a full-fledged malware yet, it surely contains the potential to become such. After the infiltration, OhNo! virus generates multiple system and shell processses[2], such as:

  • kernel32.dll
  • gdi32.dll
  • ole32.dll
  • shell32.dll
  • msvcrt.dll
  • comctl32.dll

Later on, it reads system registry files and further technical information about the system. It also launches Mount Point Manager and looks for other malware present on the system.  Additionally, the malware connects to Local Procedure Call (LPC ) port. It may hide in [random number].rar older.  

Naturally, due to its activity, the overall PC performance highly deteriorates. Such behavior lets us assume that the malware currently performs the role of data collector rather than attempts to inflict damage.  Nonetheless, the crypto-malware also has a tendency to delete some files. After it completes its preparations, the error message called “OhNo!” pops up. Here is a short extract from it:

You have been infected with OhNo! ALL your Documents, Downloads, and Desktop have been Encrypted with a Unique Key to your System.(…) Please Pay 2.XMR to the specified address below and you will receive a Email with your Key.

Currently, the threat demands 2 XMR which approximately amounts to 276 USD. Since it is still under development, we discourage you from transmitting the money. Instead, focus on OhNo! removal.

Ways to get infected with a file-encrypting threat

Regarding the features of the malware, it tends to target systems with weak Remote Desktop Protocols (RDP). However, since it may also come into a system in .rar file, it suggests that spam emails are an additional distribution option. 

You should not also exclude the possibility that the malware may dwell in a corrupted application. Thus, in order to lower the possibility of OhNo! malware hijack, make sure to update your security application, regularly scan the device and beware of the visited websites as well as downloaded software. 

Terminate OhNo! virus and delete its components

As most of ransomware threats, this threat also targets Windows. You should be able to remove OhNo! virus with the assistance of anti-virus and malware elimination utilities. However, due to the activity of the threat, it is not surprising if you will not be able to launch the tools.

If you encounter OhNo! removal problems, launch the operating system in Safe Mode, Further instructions are displayed below. Try to terminate its processes via Task Manager as well. Note that OhNo! ransomware targets non-native English speakers, such as Danish[3] users as well.

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What to do if failed?
If you failed to remove infection using Reimage, submit a question to our support team and provide as much details as possible.
Reimage is recommended to uninstall OhNo! ransomware virus. Free scanner allows you to check whether your PC is infected or not. If you need to remove malware, you have to purchase the licensed version of Reimage malware removal tool.

More information about this program can be found in Reimage review.

More information about this program can be found in Reimage review.

Manual OhNo! virus Removal Guide:

Remove OhNo! using Safe Mode with Networking

Reimage is a tool to detect malware.
You need to purchase Full version to remove infections.
More information about Reimage.

Reboot the system in Safe Mode and then launch an anti-malware tool to get rid of OhNo! malware. Since the malware may not encypt files, make haste to eradicate it.

  • Step 1: Reboot your computer to Safe Mode with Networking

    Windows 7 / Vista / XP
    1. Click Start Shutdown Restart OK.
    2. When your computer becomes active, start pressing F8 multiple times until you see the Advanced Boot Options window.
    3. Select Safe Mode with Networking from the list Select 'Safe Mode with Networking'

    Windows 10 / Windows 8
    1. Press the Power button at the Windows login screen. Now press and hold Shift, which is on your keyboard, and click Restart..
    2. Now select Troubleshoot Advanced options Startup Settings and finally press Restart.
    3. Once your computer becomes active, select Enable Safe Mode with Networking in Startup Settings window. Select 'Enable Safe Mode with Networking'
  • Step 2: Remove OhNo!

    Log in to your infected account and start the browser. Download Reimage or other legitimate anti-spyware program. Update it before a full system scan and remove malicious files that belong to your ransomware and complete OhNo! removal.

If your ransomware is blocking Safe Mode with Networking, try further method.

Remove OhNo! using System Restore

Reimage is a tool to detect malware.
You need to purchase Full version to remove infections.
More information about Reimage.

  • Step 1: Reboot your computer to Safe Mode with Command Prompt

    Windows 7 / Vista / XP
    1. Click Start Shutdown Restart OK.
    2. When your computer becomes active, start pressing F8 multiple times until you see the Advanced Boot Options window.
    3. Select Command Prompt from the list Select 'Safe Mode with Command Prompt'

    Windows 10 / Windows 8
    1. Press the Power button at the Windows login screen. Now press and hold Shift, which is on your keyboard, and click Restart..
    2. Now select Troubleshoot Advanced options Startup Settings and finally press Restart.
    3. Once your computer becomes active, select Enable Safe Mode with Command Prompt in Startup Settings window. Select 'Enable Safe Mode with Command Prompt'
  • Step 2: Restore your system files and settings
    1. Once the Command Prompt window shows up, enter cd restore and click Enter. Enter 'cd restore' without quotes and press 'Enter'
    2. Now type rstrui.exe and press Enter again.. Enter 'rstrui.exe' without quotes and press 'Enter'
    3. When a new window shows up, click Next and select your restore point that is prior the infiltration of OhNo!. After doing that, click Next. When 'System Restore' window shows up, select 'Next' Select your restore point and click 'Next'
    4. Now click Yes to start system restore. Click 'Yes' and start system restore
    Once you restore your system to a previous date, download and scan your computer with Reimage and make sure that OhNo! removal is performed successfully.

Bonus: Recover your data

Guide which is presented above is supposed to help you remove OhNo! from your computer. To recover your encrypted files, we recommend using a detailed guide prepared by 2-spyware.com security experts.

If your files are encrypted by OhNo!, you can use several methods to restore them:

The benefits of Data Recovery Pro

This tool is designed to help you restore damaged and lost files. It might come in handy recovering files affected by ransomware.

The usefulness of Shadow Explorer

It is another alternative to restore encrypted data as the program uses volume shadow copies automatically generated by the operating system and, likewise, recreates the copies of the original files. 

  • Download Shadow Explorer (http://shadowexplorer.com/);
  • Follow a Shadow Explorer Setup Wizard and install this application on your computer;
  • Launch the program and go through the drop down menu on the top left corner to select the disk of your encrypted data. Check what folders are there;
  • Right-click on the folder you want to restore and select “Export”. You can also select where you want it to be stored.

Finally, you should always think about the protection of crypto-ransomwares. In order to protect your computer from OhNo! and other ransomwares, use a reputable anti-spyware, such as Reimage, Plumbytes Anti-MalwareWebroot SecureAnywhere AntiVirus or Malwarebytes Anti Malware

About the author

Julie Splinters
Julie Splinters - Malware removal specialist

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