Remove Rungbu.b (Removal Guide)

Rungbu.b is a Visual Basic-based virus that infects MS Office documents

Rungbu.b

Rungbu.b is a virus that replaces Microsoft Word documents with copies of itself. Upon infiltration, it does not delete the original file that it is about to infect but rather hides its presence on the device. Also, it changes the extension of such a file to .SCR and uses Microsoft Word icon to increase obfuscation.

Name	Rungbu.b
Type	Virus
Distribution	Malicious spam emails, removable drives, malicious websites, etc.
Dangers	Damage to personal and system files
Removal	Perform a full system scan with powerful antivirus software
System fix	To revert system file destruction on a Windows machine, use Fortect Intego repair tool

The virus can spread in a few ways, for example, via the contaminated MS Word or other Office documents attached to a malicious email. Alternatively, users might also infect their devices after accessing a suspicious website and clicking on a malicious link.

Once installed, the parasite copies itself and attaches to various locations of Windows folders. It uses the following names for the placed files:

CTFMON.EXE
SPOOLSV.EXE
SVCHOST.EXE
SMSS.EXE

It is important to note that these names are commonly used by Windows and initially are not malicious. However, malware often uses the names of common system or application files in order to disguise its presence on the computer. Luckily, this trick does not work for most modern security applications, and the virus would be detected upon executing malicious actions.

As soon as the malicious files are placed, Rungbu.b will start infecting all the .DOC files as soon as they are opened. This way, the virus spreads even further. Also, it drops “desktop.ini” and “flu burung.txt” files on the system. The text file reads the following:

======= FLU BURUNG =======

Bugs Bunny say “What's up doc?”
Duffy Duck say “I'm infected doc”
So at the end of story they save the screen.

Removal options

While it is possible to remove Rungbu.b manually, it is definitely not recommended. Viruses can spread automatically and infect some system files in the process. This allows them resurface if the process of elimination is not performed correctly.

Therefore, we highly recommend you avoid manual removal at all costs. Instead, you should perform a full system scan with a security tool (just make sure that it has the latest updates for the malware definitions). This way, you will ensure that all virus files are deleted automatically and no other infections are present on the device.

Uninstall from Windows

Uninstall from Windows 10/8:

Type Control Panel into the Windows search box and open the result.
Under Programs, select Uninstall a program.

Uninstall from Windows 7/XP:

Click on Windows Start > Control Panel (Windows XP users should click on Add/Remove Programs).
In Control Panel, select Programs > Uninstall a program.

Remove the unwanted program:

In the Programs and Features window, look for any recently installed suspicious entries, select them, and click Uninstall.
If User Account Control appears, click Yes to confirm, then complete the removal.

Delete from macOS

Remove the unwanted application:

From the menu bar, select Go > Applications.
In the Applications folder, look for any suspicious entries, then drag them to Trash (or right-click and pick Move to Trash).

Delete leftover files and folders:

Select Go > Go to Folder.
Enter /Library/Application Support and remove any suspicious folders related to the unwanted program.
Repeat the same check in the /Library/LaunchAgents and /Library/LaunchDaemons folders, deleting any suspicious entries.
Finally, empty the Trash to permanently remove the leftovers.

Remove from Microsoft Edge

Delete unwanted extensions from MS Edge:

Select Menu (three horizontal dots at the top-right of the browser window) and pick Extensions.
From the list, pick the extension and click on the Gear icon.
Click Remove.

Clear cookies and other browser data:

Click on the Menu (three horizontal dots at the top-right of the browser window) and select Settings > Privacy, search, and services..
Under Clear browsing data, pick Choose what to clear.
Select Cookies and other site data and Cached images and files. (apart from passwords, although you might want to include Media licenses as well, if applicable) and click on Clear.

Restore new tab and homepage settings:

Click the menu icon and choose Settings.
Then find On startup section.
Click Remove next to any suspicious startup page.

Reset MS Edge if the above steps did not work:

Press on Ctrl + Shift + Esc to open Task Manager.
Click on More details arrow at the bottom of the window.
Select Details tab.
Now scroll down and locate every entry with Microsoft Edge name in it. Right-click on each of them and select End Task to stop MS Edge from running.

Instructions for Chromium-based Edge

Delete extensions from MS Edge (Chromium):

Open Edge and click select Settings > Extensions.
Delete unwanted extensions by clicking Remove.

Clear cache and site data:

Click on Menu and go to Settings.
Select Privacy, search and services.
Under Clear browsing data, pick Choose what to clear.
Under Time range, pick All time.
Select Clear now.

Reset Chromium-based MS Edge:

Click on Menu and select Settings.
On the left side, pick Reset settings.
Select Restore settings to their default values.
Confirm with Reset.
This will disable extensions and reset startup pages but will not delete bookmarks, saved passwords, or browsing history.

Remove from Mozilla Firefox (FF)

Remove dangerous extensions:

Open Mozilla Firefox browser and click on the Menu (three horizontal lines at the top-right of the window).
Select Add-ons.
In here, select the unwanted extension and click Remove.

Reset the homepage:

Click three horizontal lines at the top right corner to open the menu.
Choose Settings.
Under Home, set your preferred homepage and new tab settings.

Clear cookies and site data:

Click Menu and pick Settings.
Go to Privacy & Security section.
Scroll down to locate Cookies and Site Data.
Click on Clear Data...
Select Cookies and Site Data and Temporary cached files and pages, then click Clear.

Reset Mozilla Firefox

If clearing the browser as explained above did not help, reset Mozilla Firefox:

Open Mozilla Firefox browser and click the Menu.
Go to Help and then choose Troubleshooting Information.
Under Give Firefox a tune up section, click on Refresh Firefox...
Once the pop-up shows up, confirm the action by pressing on Refresh Firefox.

Remove from Google Chrome

Delete malicious extensions from Google Chrome:

Open Google Chrome, click on the Menu (three vertical dots at the top-right corner) and select More tools > Extensions.
In the newly opened window, you will see all the installed extensions. Uninstall all suspicious extensions related to the unwanted program by clicking Remove.

Clear cache and web data from Chrome:

Click on Menu and pick Settings.
Under Privacy and security, select Clear browsing data.
Select Browsing history, Cookies and other site data, as well as Cached images and files.
Click Clear data.

Change your homepage:

Click menu and choose Settings.
Look for a suspicious site in the On startup section.
Click on Open a specific or set of pages and click on three dots to find the Remove option.

Reset Google Chrome:

If the previous methods did not help you, reset Google Chrome to eliminate all the unwanted components:

Click on Menu and select Settings.
In the Settings, scroll down and click Advanced.
Scroll down and locate Reset and clean up section.
Now click Restore settings to their original defaults.
Confirm with Reset settings.

Delete from Safari

Remove dangerous extensions:

Open Safari, click Safari in the menu at the top-left of the screen, and select Preferences.
Go to the Extensions tab, look for any suspicious entries, and click Uninstall to remove them.

Clear history and website data:

Click Safari in the menu and pick Clear History.
Set Clear to all history and confirm with Clear History.

Reset Safari:

Click Safari in the menu and select Preferences > Advanced.
Enable Show Develop menu in menu bar.
From the menu bar, click Develop and select Empty Caches.

How to remove Rungbu.b

Rungbu.b is a Visual Basic-based virus that infects MS Office documents