There are plenty of other similar Trojans but this one has something more peculiar about it. CStealer utilizes a remote MongoDB database to stash the stolen passwords.
|Type||Malware, Trojan, Password Stealer|
|Short Description||A type of Trojan that tries to steal passwords stored in Google Chrome.|
|Symptoms||There may be no apparent systems of the infection.|
|Distribution Method||Common distribution tactics and direct web attacks.|
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|User Experience||Join Our Forum to Discuss CStealer Trojan.|
SectopRAT Trojan – Details
What sets aside this password-stealing Trojan from other similar threats is the fact that it uploads the harvested passwords from Chrome to a remote MongoDB database. The usual behavior of such a Trojan would be to compile the stolen data into a file, and then send it to a command-and-control server controlled by the malware operators.
CStealer includes hardcoded MongoDB credentials and uses the MongoDB C driver as a client library to connect to the database. Cybersecurity researcher James tested this and concluded that when the Trojan harvests Chrome passwords, it connects to the remote database with the idea to keep them for later retrieval.
This technique does serve the purse of stealing passwords but in the meantime, it creates an opportunity for other attackers to gain access to the stolen credentials. In fact, anyone analyzing the Trojan can retrieve the hardcoded credentials and use them to obtain access to the stolen data.
The exact distribution method of CStealer hasn’t been confirmed but Trojans are usually spread through the following tactics:
- Phishing Strategies — The criminals can send out email messages or make scam sites that will impersonate well-known services or companies. By interacting with them the recipients and site visitors will get infected with the NukeSped Trojan. They are commonly hosted on similar sounding domain names and may include stolen/fake design and self-signed security certificates.
- Macro-Infected Documents — The hacking collective will create documents that contain malware macros that when run will install the Trojan. They can be of all popular formats: presentations, databases, text files and spreadsheets.
- Application Installers — They are malware-infected setup of popular software which are often downloaded and installed by end users: productivity tools, office programs, creativity suites and etc.
- Social Networks — Using fake or hacked profiles links to the malware files or malware copies of the Trojan can be either publicly shared or posted in groups, private messages and on different pages.
- Web Browser Extensions — The other popular method is to create malware extensions for the most popular web browsers. They are commonly uploaded to their relevant repositories with fake user reviews and developer accounts. They are often accompanied with elaborate descriptions that will promise feature additions or performance updates.
NOTE. CStealer’s main purpose is to harvest passwords stored in the Chrome browser. However, there are more sophisticated Trojans. For example, an evolved Trojan can steal various credentials from the victim, among other malicious capabilities, such as the PyXie RAT which was just discovered by security researchers. We would like to remind our readers that the winter holidays are a preferred time of the year for malware campagns. Since most holiday shopping takes place online and individuals are increasingly using their credit cards and other online payment options, cybercriminals can include password-stealing components in their malware to harvest payment information. Thus, appropriate anti-malware protection is highly advisable.
CStealer Trojan – Removal
In order to fully remove the CStealer Trojan 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, 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 CStealer Trojan files and programs related to it and should protect your computer against similar attacks in the future.
- Guide 1: How to Remove CStealer Trojan from Windows.
- Guide 2: Get rid of CStealer Trojan on Mac OS X.
- Guide 3: Remove CStealer Trojan in Google Chrome.
- Guide 4: Erase CStealer Trojan from Mozilla Firefox.
- Guide 5: Uninstall CStealer Trojan from Microsoft Edge.
- Guide 6: Remove CStealer Trojan from Safari.
- Guide 7: Eliminate CStealer Trojan from Internet Explorer.
- Guide 8: Disable CStealer Trojan Push Notifications in Your Browsers.
About the CStealer Trojan Research
The content we publish on SensorsTechForum.com, this CStealer Trojan how-to removal guide included, is the outcome of extensive research, hard work and our team’s devotion to help you remove the specific, adware-related problem, and restore your browser and computer system.
How did we conduct the research on CStealer Trojan?
Please note that our research is based on independent investigation. We are in contact with independent security researchers, thanks to which we receive daily updates on the latest malware, adware, and browser hijacker definitions.
Furthermore, the research behind the CStealer Trojan threat is backed with VirusTotal https://www.virustotal.com/gui/home/upload.
To better understand this online threat, please refer to the following articles which provide knowledgeable details.
1.Browser Redirect – What Is It?
2.Adware Is Malicious, and It Uses Advanced Techniques to Infect
3.The Thin Red Line Between Potentially Unwanted Programs and Malware
4.The Pay-Per-Install Affiliate Business – Making Millions out of Adware
5.Malicious Firefox Extensions Installed by 455,000 Users Blocked Updates
How to Remove CStealer Trojan from Windows.
Step 1: Boot Your PC In Safe Mode to isolate and remove CStealer Trojan
Step 2: Uninstall CStealer 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 CStealer 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 CStealer Trojan there. This can happen by following the steps underneath:
1. Open the Run Window again, type "regedit" and click OK.
2. When you open it, you can freely navigate to the Run and RunOnce keys, whose locations are shown above.
3. You can remove the value of the virus by right-clicking on it and removing it.
Step 4: Scan for CStealer Trojan with SpyHunter Anti-Malware Tool
1. Click on the "Download" button to proceed to SpyHunter's download page.
2. After you have installed SpyHunter, wait for it to update automatically.
3. After the update process has finished, click on the 'Malware/PC Scan' tab. A new window will appear. Click on 'Start Scan'.
4. After SpyHunter has finished scanning your PC for any files of the associated threat and found them, you can try to get them removed automatically and permanently by clicking on the 'Next' button.
Video Removal Guide for CStealer Trojan (Windows).
Get rid of CStealer Trojan from Mac OS X.
Step 1: Uninstall CStealer 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:
2. Find Activity Monitor and double-click it:
3.In the Activity Monitor look for any suspicious processes, belonging or related to CStealer Trojan:
4.Click on the "Go" button again, but this time select Applications. Another way is with the ⇧+⌘+A buttons.
5.In the Applications menu, look for any suspicious app or an app with a name, similar or identical to CStealer Trojan. If you find it, right-click on the app and select “Move to Trash”.
6: Select Accounts, after which click on the Login Items preference.
Your Mac will then show you a list of items that start automatically when you log in. Look for any suspicious apps identical or similar to CStealer Trojan. Check the app you want to stop from running automatically and then select on the Minus (“-“) icon to hide it.
7: Remove any left-over files that might be related to this threat manually by following the sub-steps below:
- 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 CStealer 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:
1: Click on "Go" and Then "Go to Folder" as shown underneath:
2: Type in "/Library/LauchAgents/" and click Ok:
3: Delete all of the virus files that have similar or the same name as CStealer Trojan. If you believe there is no such file, do not delete anything.
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 CStealer Trojan files from your Mac
When you are facing problems on your Mac as a result of unwanted scripts and programs such as CStealer Trojan, 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.
Video Removal Guide for CStealer Trojan (Mac)
Remove CStealer 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 CStealer 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 CStealer 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 CStealer 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 CStealer Trojan will be removed.
Eliminate CStealer 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.
Remove Push Notifications caused by CStealer Trojan from Your Browsers.
Turn Off Push Notifications from Google Chrome
To disable any Push Notices from Google Chrome browser, please follow the steps below:
Step 1: Go to Settings in Chrome.
Step 2: In Settings, select “Advanced Settings”:
Step 3: Click “Content Settings”:
Step 4: Open “Notifications”:
Step 5: Click the three dots and choose Block, Edit or Remove options:
Remove Push Notifications on Firefox
Step 1: Go to Firefox Options.
Step 2: Go to “Settings”, type “notifications” in the search bar and click "Settings":
Step 3: Click “Remove” on any site you wish notifications gone and click “Save Changes”
Stop Push Notifications on Opera
Step 1: In Opera, press ALT+P to go to Settings.
Step 2: In Setting search, type “Content” to go to Content Settings.
Step 3: Open Notifications:
Step 4: Do the same as you did with Google Chrome (explained below):
Eliminate Push Notifications on Safari
Step 1: Open Safari Preferences.
Step 2: Choose the domain from where you like push pop-ups gone and change to "Deny" from "Allow".
CStealer Trojan FAQ
What is CStealer Trojan?
The CStealer Trojan threat is adware or browser redirect virus. It may slow your computer down siginficantly and display advertisements. The main idea is for your information to likely get stolen or more ads to appear on your device.
The creators of such unwanted apps work with pay-per-click schemes to get your computer to visit risky or different types of websites that may generate them funds. This is why they do not even care what types of websites show up on the ads. This makes their unwanted software indirectly risky for your OS.
What are the symptoms of CStealer Trojan?
There are several symptoms to look for when this particular threat and also unwanted apps in general are active:
Symptom #1: Your computer may become slow and has poor performance in general.
Symtpom #2: You have toolbars, add-ons or extensions on your web browsers that you don't remember adding.
Symptom #3: You see all types of ads, like ad-supported search results, pop-ups and redirects to randomly appear.
Symptom #4: You see installed apps on your Mac running automatically and you do not remember installing them.
Symptom #5: You see suspicious processes running in your Task Manager.
If you see one or more of those symptoms, then security experts reccomend that you check your computer for viruses.
What types of Unwanted Programs are there?
According to most malware researchers and cyber-security experts, the threats that can currently affect your Mac can be the following types:
- Rogue Antivirus programs.
- Browser hijackers.
- Fake optimizers.
What to do if I have a "virus" like CStealer Trojan?
Do not panic! You can easily get rid of most adware or unwanted program threats by firstly isolating them and then removing them from your browser and computer. One reccomended way to do that is by using a reputable malware removal software that can take care of the removal automatically for you. There are many anti-malware apps out there that you can choose from. SpyHunter is one of the reccomended anti-malware apps, that can scan your computer for free and detect any viruses, tracking cookies and unwanted adware apps and eliminate them quickly. This saves time when compared to doing the removal manually.
How to secure my passwords and other data from CStealer Trojan?
With few simple actions. First and foremost, it is imperative that you follow these steps:
Step 1: Find a safe computer and connect it to another network, not the one that your Mac was infected in.
Step 2: Change all of your passwords, starting from your e-mail passwords.
Step 3: Enable two-factor authentication for protection of your important accounts.
Step 4: Call your bank to change your credit card details (secret code, etc.) if you have saved your credit card for online shopping or have done online activiites with your card.
Step 5: Make sure to call your ISP (Internet provider or carrier) and ask them to change your IP address.
Step 6: Change your Wi-Fi password.
Step 7: (Optional): Make sure to scan all of the devices connected to your network for viruses and repeat these steps for them if they are affected.
Step 8: Install anti-malware software with real-time protection on every device you have.
Step 9: Try not to download software from sites you know nothing about and stay away from low-reputation websites in general.
If you follow these reccomendations, your network and all devices will become significantly more secure against any threats or information invasive software and be virus free and protected in the future too.
More tips you can find on our website, where you can also ask any questions and comment underneath the articles about your computer problems. We will try to respond as fast as possible.