Rombertik, a new piece of malware has been detected in the wild recently. What makes the threat unique is its aggressive behavior towards any attempts to be monitored. If Rombertik recognizes that it is being analyzed, it tries to overwrite the MBR (master boot record) of the hard drive.
Once installed Rombertik acts as typical data-collecting malware. But the threat’s method to inspect if it’s operating in a VM-provided sandbox and its behavior in case it does, are unique.
Rombertik contains a large amount of information, which purpose is to make it look genuine. Researchers at Cisco report that about 97% of the packed files are in fact never used by the malware.
As soon as Rombertik starts operating, the executable writes around 960 million bytes of memory, which aim to flood any application that tries to trace the threat by 100GB log files.
As Rombertik completes its mission, it checks for certain errors that are typically suppressed by VM.
If Rombertik does not detect a Sandbox environment, the threat unpacks itself. The malware’s code is obfuscated with numerous jumps, functions and needles bloat on purpose.
Rombertik’s anti-analysis code is a relatively simple flowchart with a large number of iterations. The executable, on the other hand, is quite messy. Its primary goal is to stop researchers from discovering what is being written.
As this process is finished, the malware computes a 32-bit hash and compares it to an unpacked sample. In case, Rombertik detects that it runs in VM it tries to overwrite the MBR of the victim’s hard drive. If the threat can’t access the drive, it starts encrypting all the files in the Administrator directory. For this action, Rombertik uses an RC4 key. If Rombertik cannot damage the MBR, the partition data gets overwritten with null bytes, which makes restoring the drive almost impossible.
Rombertik apparently combines different malware elements, which make sure that the threat is delivered and activated. Experts express various opinions about the authors of this complex Trojan and compare its obfuscation technique as a feature that can only be designed by state actors.
Spy Hunter scanner will only detect the threat. If you want the threat to be automatically removed, you need to purchase the full version of the anti-malware tool.Find Out More About SpyHunter Anti-Malware Tool / How to Uninstall SpyHunter
- Guide 1: How to Remove Malware from Windows.
- Guide 2: Get rid of Malware from Mac OS X.
- Guide 3: Remove Malware from Google Chrome.
- Guide 4: Erase Malware from Mozilla Firefox.
- Guide 5: Uninstall Malware from Microsoft Edge.
- Guide 6: Remove Malware from Safari.
- Guide 7: Eliminate Malware from Internet Explorer.
How to Remove Malware from Windows.
Step 1: Boot Your PC In Safe Mode to isolate and remove Malware
Step 2: Uninstall Malware and related software from Windows
Here is a method in few easy steps that should be able to uninstall most programs. No matter if you are using Windows 10, 8, 7, Vista or XP, those steps will get the job done. Dragging the program or its folder to the recycle bin can be a very bad decision. If you do that, bits and pieces of the program are left behind, and that can lead to unstable work of your PC, errors with the file type associations and other unpleasant activities. The proper way to get a program off your computer is to Uninstall it.
Step 3: Clean any registries, created by Malware on your computer.
The usually targeted registries of Windows machines are the following:
You can access them by opening the Windows registry editor and deleting any values, created by Malware there. This can happen by following the steps underneath:
Get rid of Malware from Mac OS X.
Step 1: Uninstall Malware and remove related files and objects
1. Hit the ⇧+⌘+U keys to open Utilities. Another way is to click on “Go” and then click “Utilities”, like the image below shows:
- Go to Finder.
- In the search bar type the name of the app that you want to remove.
- Above the search bar change the two drop down menus to “System Files” and “Are Included” so that you can see all of the files associated with the application you want to remove. Bear in mind that some of the files may not be related to the app so be very careful which files you delete.
- If all of the files are related, hold the ⌘+A buttons to select them and then drive them to “Trash”.
In case you cannot remove Malware via Step 1 above:
In case you cannot find the virus files and objects in your Applications or other places we have shown above, you can manually look for them in the Libraries of your Mac. But before doing this, please read the disclaimer below:
You can repeat the same procedure with the following other Library directories:
Tip: ~ is there on purpose, because it leads to more LaunchAgents.
Step 2: Scan for and remove Malware files from your Mac
When you are facing problems on your Mac as a result of unwanted scripts and programs such as Malware, the recommended way of eliminating the threat is by using an anti-malware program. SpyHunter for Mac offers advanced security features along with other modules that will improve your Mac’s security and protect it in the future.
Remove Malware from Google Chrome.
Step 1: Start Google Chrome and open the drop menu
Step 2: Move the cursor over "Tools" and then from the extended menu choose "Extensions"
Step 3: From the opened "Extensions" menu locate the unwanted extension and click on its "Remove" button.
Step 4: After the extension is removed, restart Google Chrome by closing it from the red "X" button at the top right corner and start it again.
Erase Malware from Mozilla Firefox.
Step 1: Start Mozilla Firefox. Open the menu window
Step 2: Select the "Add-ons" icon from the menu.
Step 3: Select the unwanted extension and click "Remove"
Step 4: After the extension is removed, restart Mozilla Firefox by closing it from the red "X" button at the top right corner and start it again.
Uninstall Malware from Microsoft Edge.
Step 1: Start Edge browser.
Step 2: Open the drop menu by clicking on the icon at the top right corner.
Step 3: From the drop menu select "Extensions".
Step 4: Choose the suspected malicious extension you want to remove and then click on the gear icon.
Step 5: Remove the malicious extension by scrolling down and then clicking on Uninstall.
Remove Malware from Safari.
Step 1: Start the Safari app.
Step 2: After hovering your mouse cursor to the top of the screen, click on the Safari text to open its drop down menu.
Step 3: From the menu, click on "Preferences".
Step 4: After that, select the 'Extensions' Tab.
Step 5: Click once on the extension you want to remove.
Step 6: Click 'Uninstall'.
A pop-up window will appear asking for confirmation to uninstall the extension. Select 'Uninstall' again, and the Malware will be removed.
Eliminate Malware from Internet Explorer.
Step 1: Start Internet Explorer.
Step 2: Click on the gear icon labeled 'Tools' to open the drop menu and select 'Manage Add-ons'
Step 3: In the 'Manage Add-ons' window.
Step 4: Select the extension you want to remove and then click 'Disable'. A pop-up window will appear to inform you that you are about to disable the selected extension, and some more add-ons might be disabled as well. Leave all the boxes checked, and click 'Disable'.
Step 5: After the unwanted extension has been removed, restart Internet Explorer by closing it from the red 'X' button located at the top right corner and start it again.