The COMpfun Trojan is a malware remote access tool which is currently being used in an attack against European diplomatic entities. This is actually an updated version of a previously released Trojan, according to security researches it might be organized by the Turla hacking group, one of the famous criminal collectives.
This updated COMpfun Trojan includes much improved functionality when compared with previous versions. This is the reason why a whole new malware analysis was performed on the collected samples. It also contains some code similarities with other high-profile malware tools used by hackers.
|Short Description||A dangerous malware which can launch different components and start a Trojan module.|
|Symptoms||The victims may notice performance issues and can get infected with other malware.|
|Distribution Method||Common distribution tactics and direct web attacks.|
|Detection Tool|| See If Your System Has Been Affected by malware |
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|User Experience||Join Our Forum to Discuss COMpfun Trojan.|
COMpfun Trojan — What Is It?
The discovery of the COMpfun Trojan in a highly sophisticated attack targeting mainly European diplomatic entities was a surprise. The first factor is that this appears to be a heavily updated version of the original threat, only through some of the unchanged code the identification was made. The original discovery of the malware dates back to 2014, since then there have been probably numerous changes.
The COMpfun Trojan is also being spread by the infamous group called Turla which have been responsible for numerous devastating attacks over the years. In some of their campaigns they have used custom tools and have carefully researched the target network in order to maximize the damage potential. The Trojan with updated code was confirmed in November 2019 and includes updated capabilities that add in many more features as compared to previous releases.
COMpfun Trojan — How It Infects?
At the moment of writing this article it is not known which infection strategy is being used to deliver the Trojan. What we know for sure is that this is done via a several stage infection approach. What we know is that the first-stage payload dropper contains both a legitimate application (probably part of an infected setup bundle or file) and will drop the Trojan code. There are several ways through which this can be done:
- Phishing Strategies — The files can be sent via phishing messages and sites that impersonate well-known company and service notifications. The files can be attached or linked in them.
- File-Sharing Networks — The files can be uploaded to file-sharing networks like BitTorrent and other places where pirate and legitimate data is shared.
- Direct Network Attacks — This particular threat can propagate in a worm-like manner across a compromised network.
The COMpfun Trojan has been found to feature an aggressive infection mechanism — once a given machine is infected with it the virus can spread to connected removable devices and network shares.
COMpfun Trojan — What Does It Do?
Once the Trojan is installed on a given computer it will be deployed in an encrypted form. The initial loader will decrypt the module and uncompressed it. The files will then be placed on the target system as either a DOC or strong>PDF file. This is followed by a prompt asking the users to run the files with administrative privileges. If they accept the Trojan will be installed in the right architecture — 32 or 64-bit.
One of the first actions which are run by the engine is to launch the infecting removable devices which are connected to the host system. The preparatory stage is to evade the security systems which are used to detect viruses and malware. This is done by bypassing the detection engines of active anti-virus programs, firewalls and other related applications. This Trojan will also act against sandbox environments and virtual machine hosts which are used to capture viruses. The next step is to escalate the privileges so that the malware engine can run actions as administrators. The main Trojan will then launch other mechanisms making sure that they will run undetected. Being a remote access Trojan like other advanced tools used by the Turla hackers group it can also hijack mouse movement and keyboard input. This will result in the gathering of both personal user information and system data.
The Trojan connection will be to a hacker-controlled server using a network connection which uses both HTTP and HTTPS packets. This means that both raw and encrypted messages can be used to communicate with the servers. This is done to drive the local malware performing the common Trojan actions:
- Persistent Installation> — This means that the virus will install itself in a way which will make start the relevant virus as soon as the computer is powered on. The engine will also maintain its running condition by stopping processes that attempt to remove it.
- System Data Gathering — The virus will also generate an unique identification value that is assigned to every individual computer. This is done by using an algorithm that calculates it based on the installed hardware components and operating system conditions.
- Further Devices Infectionstrong> — The COMpfun Trojan will be driven to infect available network shares and removable devices in an attempt to contaminate as many computers as possible.
COMpfun Trojan — What Are Its Unique Features?
What’s distinctive about this malware is that it is programmed send out valid HTTP(S) status code — they are implemented in the RFC specifications of the network protocols. This means that they will not be analyzed by security systems as they are trusted to be part of the whole network stack implementation.
The COMPfun malware analysis reveals how these status messages are utilized by the Trjan:
- HTTP Status 200 (OK) — This will make the local client send out all collected information to the hacker-controlled server.
- HTTP STATUS 402 (Payment Required) — This status will manipulate the system to process the received commands.
- HTTP STATUS 422 (Unprocessable Entiy) — This will delete the Trojan, all associated files and disable the persistence mechanism.
- HTTP STATUS 423 (Locked) — This will initiate the installation of the COMpfun Trojan, drops all relevant files and starts the persistent mechanism.
- HTTP STATUS 424 (Failed Dependency) — This will start the collection of sensitive user files, geolocation data and network information.
- HTTP STATUS 427 (Undefined HTTP Status) — This will retrieve new commands and save them to a local file called IEA94E3.tmp located in the %TEMP% folder which will then be run.
- HTTP STATUS 428 (Precondition Required) — This will trigger the USB devices infection.
- HTTP STATUS 229 (Too Many Requests) — This option will enumerate all available network devices on the network and send out the information to the hackers.
The Trojan is fully capable of injecting itself in various processes — from user-installed applications to system services. This allows the malware to hijack user data from them and also monitor the user interactions.
How to Remove COMpfun Trojan
In order to fully remove COMpfun from your computer system, we recommend that you follow the removal instructions underneath this article. If the first two manual removal steps do not seem to work and you still see COMpfun or programs, related to it, we suggest what most security experts advise – to download and run a scan of your computer with a reputable anti-malware program. Downloading this software will not only save you some time, but will remove all of COMpfun files and programs related to it and will protect your computer against such intrusive apps and malware in the future.
- Guide 1: How to Remove COMpfun Trojan from Windows.
- Guide 2: Get rid of COMpfun Trojan from Mac OS X.
- Guide 3: Remove COMpfun Trojan from Google Chrome.
- Guide 4: Erase COMpfun Trojan from Mozilla Firefox.
- Guide 5: Uninstall COMpfun Trojan from Microsoft Edge.
- Guide 6: Remove COMpfun Trojan from Safari.
- Guide 7: Eliminate COMpfun Trojan from Internet Explorer.
How to Remove COMpfun Trojan from Windows.
Step 1: Boot Your PC In Safe Mode to isolate and remove COMpfun Trojan
Step 2: Uninstall COMpfun Trojan 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 COMpfun Trojan 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 COMpfun Trojan there. This can happen by following the steps underneath:
Get rid of COMpfun Trojan from Mac OS X.
Step 1: Uninstall COMpfun Trojan 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 COMpfun Trojan 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 from your Mac
When you are facing problems on your Mac as a result of unwanted scripts, programs and malware, the recommended way of eliminating the threat is by using an anti-malware program. Combo Cleaner offers advanced security features along with other modules that will improve your Mac’s security and protect it in the future.
Remove COMpfun Trojan 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 COMpfun Trojan 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 COMpfun Trojan 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 COMpfun Trojan 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 COMpfun Trojan will be removed.
Eliminate COMpfun Trojan 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.