Ransom.Win32.MRDEC.G

To terminate the malware/grayware/spyware process:

1. Scan your computer with your Trend Micro product and take note of the name of the malware/grayware/spyware detected.
2. Open Windows Task Manager. To do this, press CTRL+SHIFT+ESC.
3. View the list of all running programs. To do this:
   • For Windows 7 and Server 2008 (R2) users, click the Processes tab.
   • For Windows 8, 8.1, 10, and Server 2012 (R2) users, click the Details tab.
4. In the list of running programs, locate a malware/grayware/spyware file detected earlier.
5. Select the detected files, then press either the End Task or the End Process button, depending on the version of Windows you are using.
6. Do the same for the remaining detected malware/grayware/spyware files in the list of running programs.
7. To check if the malware/grayware/spyware process has been terminated, close Task Manager, and then open it again.
8. Close Task Manager.

To delete the registry key this malware/grayware created:

1. Open Registry Editor.
   » For Windows 7 and Windows Server 2008 (R2) users, click the Start button, type regedit in the Search input field then press Enter.
   » For Windows 8, Windows 8.1, Windows 10, and Windows Server 2012 (R2) users, right-click on the lower left corner of the screen, click Run, type regedit in the text box provided, and then press Enter.
2. In the left panel, double-click the following:
   HKEY_CLASSES_ROOT
3. Still in the left panel, locate and delete the key:
   .[ID]{random 16-character string}[ID]
4. Close Registry Editor.

To delete the registry value this malware/grayware created:

1. Open Registry Editor.
   » For Windows 7 and Windows Server 2008 (R2) users, click the Start button, type regedit in the Search input field then press Enter.
   » For Windows 8, Windows 8.1, Windows 10, and Windows Server 2012 (R2) users, right-click on the lower-left corner of the screen, click Run, type regedit in the text box provided, and then press Enter.
2. In the left panel, double-click the following:
   HKEY_LOCAL_MACHINE>SOFTWARE>Microsoft>Windows>CurrentVersion>Run
3. In the right panel, locate and delete the entry:
   unlock = %System Root%\Decoding help.hta
4. Again In the right panel, locate and delete the entry:
   searchfiles = %Windows%\searchfiles.exe
5. In the left panel, double-click the following:
   HKEY_LOCAL_MACHINE>SOFTWARE>Microsoft>Windows>CurrentVersion>DateTime
6. In the right panel, locate and delete the entry:
   rsa = "{binary value}"
7. Again In the right panel, locate and delete the entry:
   orsa = "{binary value}"
8. Close Registry Editor.

To restore the registry value this malware/grayware modified:

1. Open Registry Editor.
   » For Windows 7 and Server 2008 (R2) users, click the Start button, type regedit in the Search input field then press Enter.
   » For Windows 8, 8.1, 10, and Server 2012 (R2) users, right-click on the lower left corner of the screen, click Run, type regedit in the text box provided, and then press Enter.
2. In the left panel, double-click the following:
   HKEY_LOCAL_MACHINE>SOFTWARE>Microsoft>Windows>CurrentVersion>Policies>System
3. In the right panel, locate the registry value:
   EnableLUA = 0
4. Right-click on the value name and choose Modify. Change the value data of this entry to:
   EnableLUA = 1
5. Again In the right panel, locate the registry value:
   ConsentPromptBehaviorAdmin = 0
6. Right-click on the value name and choose Modify. Change the value data of this entry to:
   ConsentPromptBehaviorAdmin = 5
7. Again In the right panel, locate the registry value:
   PromptOnSecureDesktop = 0
8. Right-click on the value name and choose Modify. Change the value data of this entry to:
   PromptOnSecureDesktop = 1
9. Close Registry Editor.

To delete malware/grayware files:

For Windows 7 and Server 2008 (R2), 8, 8.1, 10, and Server 2012 (R2):

1. Open a Windows Explorer window.
   • For Windows 7 and Server 2008 (R2) users, click Start>Computer.
   • For Windows 8, 8.1, 10, and Server 2012 users, right-click on the lower left corner of the screen, then click File Explorer.
2. In the Search Computer/This PC input box, type:
    
   • %Windows%\searchfiles.exe
   • {Affected directory}\Decoding help.hta
3. Once located, select the file then press SHIFT+DELETE to delete it.
4. Repeat the said steps for all files listed.
   *Note: Read the following Microsoft page if these steps do not work on Windows 7 and Server 2008 (R2).