Gergana has completed a bachelor degree in Marketing from the University of National and World Economy. She has been with the STF team for three years, researching malware and reporting on the latest infections.
Gergana has completed a bachelor degree in Marketing from the University of National and World Economy. She has been with the STF team for three years, researching malware and reporting on the latest infections.
This article explains the issues that occur when .USA files virus infects a target system. It also provides a step-by-step guide on how to remove malicious files and how to potentially recover files encrypted by this ransomware.
A data locker ransomware dubbed after the extension it uses to mark corrupted files .USA files virus has been spotted in the wild. As identified by security researchers it belongs to the infamous Dharma ransomware family. In case of infection with this threat, you all your important files will remain inaccessible until their code is reverted back to original state. Once they are encrypted they will appear with the specific extension .USA at the end of their names. In addition, a ransom message will load on the screen to extort a ransom fee.
Threat Summary
Name
.USA Files Virus
Type
Ransomware, Cryptovirus
Short Description
A version of the CrySyS/Dharma ransomware that is designed to encrypt valuable files stored on infected computers and then extort a ransom from victims.
Symptoms
Important files are encrypted and renamed with the extension .USA A ransom note appears on PC screen to present ransom payment instructions.
Distribution Method
Spam Emails, Email Attachments
Detection Tool
See If Your System Has Been Affected by .USA Files Virus
Windows Data Recovery by Stellar Phoenix Notice! This product scans your drive sectors to recover lost files and it may not recover 100% of the encrypted files, but only few of them, depending on the situation and whether or not you have reformatted your drive.
.USA Files Virus (Dharma) – Distribution
Security researchers’ reports indicate that this .USA Dharma ransomware is currently circling around the net in active attack campaigns. Attack campaigns could be set against users worldwide. As of the distribution channels used by hackers they are likely to be some of the most common ones such as malspam, malvertising, freeware installers, corrupted web pages, fake software updates, and other.
The most probable one remains the malspam. It is a technique that enables hackers to deliver their malicious code on users’ devices with the help of specially crafted emails. Such emails usually contain one or more of the following components:
A link to compromised web page that is set to download and execute infection files directly on the PC. The URL address to this page may be presented in the form of an in-text link, banner, image, button or full URL address.
A malicious file attachment that is presented as legitimate document by the text message. It could be uploaded in a .rar or .zip archive. Such a file could be set to evade active security measures and trick you into running the ransomware on your PC.
Additional spread techniques that may be currently spreading this sample of Dharma ransomware are fake software installers, fake update notifications, compromised software setups, files shared on forums and other techniques may download and activate the ransomware module.
.USA Files Virus (Dharma) – Overview
The .USA files virus is a nasty ransomware infection that plagues computer systems in order to reach users’ files and encode them with the help of sophisticated cipher algorithm. According to analyses conducted by security researchers, it is a strain of the infamous Dharma ransomware.
In order that the infection process with .USA cryptovirus could begin, the ransomware payload should be started on the system. The moment this happens, the threat becomes able to contaminate various system settings that will eventually help it to reach data encryption stage. In addition to the payload file that contains a set of different commands, several other malicious files are likely to be established during the attack. The locations of these files may be some of the following system folders:
%AppData%
%Local%
%LocalLow%
%Roaming%
%Temp%
Beware that if you choose to remove this ransomware manually, you may not be able to find all malicious files and objects created on your infected system. On one hand, .USA files virus could name some of its files after legitimate system files. On the other hand, after acquiring administrative rights it could hide them somewhere deep on the system. And in case that some of its associated files remain on the system, they will continue endangering the security of your device and data.
By executing its malicious files in a strictly defined order, .USA Dharma ransomware becomes able to manipulate the functionalities of various system components which eventually enables it to evade detection while passing through its different infection stages. One system component that is probably set as a target of this ransomware is the Registry Editor or its Run and RunOnce keys in particular. This could be explained by the fact that these registry keys manage the automatic execution of all files listed under their directories:
So once .USA files virus has its malicious values there, it starts loading them on every next system power on. Another reason for the contamination of the registry key RunOnce is the automatic display of a ransom note. This usually happens at the end of the attack.
The purpose of this note is to extort a ransom payment for the recovery of encrypted files. At this point, it is only clear that hackers present the email usacode@aol.com for contact. No matter of the amount of the demanded ransom, we advise you to avoid transferring it to hackers as this action does not guarantee the recovery of .USA files. Keep reading to find some alternative methods that are secure and may be useful as well.
.USA Files Virus (Dharma) – Encryption Process
Like some previous versions of Dharma ransomware (
.bkp, etc.), Dharma .USA crypto virus primary goal is to reach data encryption stage. During this stage it activates a built-in encryption module that utilizes a single cipher algorithm or a combination of two cipher algorithms to encode target types of files.
Following encryption, valuable files become inaccessible due to significant changes in their original code. Unfortunately, all of your important files could be affected by the ransomware including all your:
Documents.
Audio files.
Videos.
Image files.
Databases.
Archives.
Banking files.
Corrupted files could be recognized by the distinctive extension .USA appended to their names. Your access to information stored by .USA files is restricted and that’s why hackers attempt to blackmail you into paying a ransom for decryption tool. However, there is no guarantee that they could provide you with a working solution as the code of their threat could be broken. So what we could recommend you is the help of alternative data recovery methods some of which are available in our removal guide.
Remove .USA Files Virus and Restore Data
This Dharma ransomware strain associated with .USA extension is a threat with highly complex code that plagues not only your files but your whole system. So you should properly clean and secure your infected system before you could use it regularly again. Below you could find a step-by-step removal guide that may be helpful in attempting to remove this ransomware. Choose the manual removal approach if you have previous experience with malware files. If you don’t feel comfortable with the manual steps select the automatic section from the guide. Steps there enable you to check the infected system for ransomware files and remove them with a few mouse clicks.
In order to keep your system safe from ransomware and other types of malware in future, you should consider the installation of a reliable anti-malware program. As an additional security layer that could prevent the occurrence of ransomware attacks you could install an
If you want to understand how to potentially fix encrypted files with the help of alternative data recovery approaches, make sure to read carefully all details mentioned in the step “Restore files”. We remind you that before you begin with the data recovery process, you should back up all encrypted files to an external drive as this will help you to prevent their irreversible loss.
Gergana has completed a bachelor degree in Marketing from the University of National and World Economy. She has been with the STF team for three years, researching malware and reporting on the latest infections.
Gergana has completed a bachelor degree in Marketing from the University of National and World Economy. She has been with the STF team for three years, researching malware and reporting on the latest infections.
Gergana has completed a bachelor degree in Marketing from the University of National and World Economy. She has been with the STF team for three years, researching malware and reporting on the latest infections.
.USA Files Virus may remain persistent on your system and may re-infect it. We recommend you to download SpyHunter and run free scan to remove all virus files on your PC. This saves you hours of time and effort compared to doing the removal yourself.
Keep in mind, that SpyHunter’s scanner is only for malware detection. If SpyHunter detects malware on your PC, you will need to purchase SpyHunter’s malware removal tool to remove the malware threats. Read our SpyHunter 5 review. Click on the corresponding links to check SpyHunter’s EULA, Privacy Policy and Threat Assessment Criteria.
Preparation before removing .USA Files Virus.
Before starting the actual removal process, we recommend that you do the following preparation steps.
Make sure you have these instructions always open and in front of your eyes.
Do a backup of all of your files, even if they could be damaged. You should back up your data with a cloud backup solution and insure your files against any type of loss, even from the most severe threats.
Be patient as this could take a while.
Step 1: Boot Your PC In Safe Mode to isolate and remove .USA Files Virus
OFFER
Manual Removal Usually Takes Time and You Risk Damaging Your Files If Not Careful!
We Recommend To Scan Your PC with SpyHunter
Keep in mind, that SpyHunter’s scanner is only for malware detection. If SpyHunter detects malware on your PC, you will need to purchase SpyHunter’s malware removal tool to remove the malware threats. Read our SpyHunter 5 review. Click on the corresponding links to check SpyHunter’s EULA, Privacy Policy and Threat Assessment Criteria
1. Hold Windows key()+ R
2. The “Run” Window will appear. In it, type “msconfig” and click OK.
3. Go to the “Boot” tab. There select “Safe Boot” and then click “Apply” and “OK”.
Tip: Make sure to reverse those changes by unticking Safe Boot after that, because your system will always boot in Safe Boot from now on.
4. When prompted, click on “Restart” to go into Safe Mode.
5. You can recognise Safe Mode by the words written on the corners of your screen.
Step 2: Clean any registries, created by .USA Files Virus 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 .USA Files Virus 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.
Tip: To find a virus-created value, you can right-click on it and click “Modify” to see which file it is set to run. If this is the virus file location, remove the value.
Step 3: Find files created by .USA Files Virus
For Windows 8, 8.1 and 10. For Windows XP, Vista, and 7.
For Newer Windows Operating Systems
1: On your keyboard press + R and write explorer.exe in the Run text box and then click on the Ok button.
2: Click on your PC from the quick access bar. This is usually an icon with a monitor and its name is either “My Computer”, “My PC” or “This PC” or whatever you have named it.
3: Navigate to the search box in the top-right of your PC’s screen and type “fileextension:” and after which type the file extension. If you are looking for malicious executables, an example may be “fileextension:exe”. After doing that, leave a space and type the file name you believe the malware has created. Here is how it may appear if your file has been found:
N.B. We recommend to wait for the green loading bar in the navination box to fill up in case the PC is looking for the file and hasn’t found it yet.
For Older Windows Operating Systems
In older Windows OS’s the conventional approach should be the effective one:
1: Click on the Start Menu icon (usually on your bottom-left) and then choose the Search preference.
2: After the search window appears, choose More Advanced Options from the search assistant box. Another way is by clicking on All Files and Folders.
3: After that type the name of the file you are looking for and click on the Search button. This might take some time after which results will appear. If you have found the malicious file, you may copy or open its location by right-clicking on it.
Now you should be able to discover any file on Windows as long as it is on your hard drive and is not concealed via special software.
IMPORTANT! Before starting “Step 4”, please boot back into Normal mode, in case you are currently in Safe Mode. This will enable you to install and use SpyHunter 5 successfully.
Step 4: Scan for .USA Files Virus with SpyHunter Anti-Malware Tool
1. Click on the “Download” button to proceed to SpyHunter’s download page.
It is recommended to run a scan before purchasing the full version of the software to make sure that the current version of the malware can be detected by SpyHunter. Click on the corresponding links to check SpyHunter’s EULA, Privacy Policy and Threat Assessment Criteria.
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.
If any threats have been removed, it is highly recommended to restart your PC.
Step 5 (Optional): Try to Restore Files Encrypted by .USA Files Virus.
Ransomware infections and .USA Files Virus aim to encrypt your files using an encryption algorithm which may be very difficult to decrypt. This is why we have suggested several alternative methods that may help you go around direct decryption and try to restore your files. Bear in mind that these methods may not be 100% effective but may also help you a little or a lot in different situations.
Method 1: Scanning your drive’s sectors by using Data Recovery software. Another method for restoring your files is by trying to bring back your files via data recovery software. Here are some suggestions for preferred data recovery software solutions:
Method 2: Trying Kaspersky and EmsiSoft’s decryptors. If the first method does not work, we suggest trying to use decryptors for other ransomware viruses, in case your virus is a variant of them. The two primary developers of decryptors are Kaspersky and EmsiSoft, links to which we have provided below:
To restore your data in case you have backup set up, it is important to check for Volume Shadow Copies, if ransomware has not deleted them, in Windows using the below software:
Method 4: Finding the decryption key while the cryptovirus sends it over a network via a sniffing tool.
Another way to decrypt the files is by using a Network Sniffer to get the encryption key, while files are encrypted on your system. A Network Sniffer is a program and/or device monitoring data traveling over a network, such as its internet traffic and internet packets. If you have a sniffer set before the attack happened you might get information about the decryption key. See how-to instructions below:
Gergana has completed a bachelor degree in Marketing from the University of National and World Economy. She has been with the STF team for three years, researching malware and reporting on the latest infections.
.USA Files Virus may remain persistent on your system and may re-infect it. We recommend you to download SpyHunter and run free scan to remove all virus files on your PC. This saves you hours of time and effort compared to doing the removal yourself.
Keep in mind, that SpyHunter’s scanner is only for malware detection. If SpyHunter detects malware on your PC, you will need to purchase SpyHunter’s malware removal tool to remove the malware threats. Read our SpyHunter 5 review. Click on the corresponding links to check SpyHunter’s EULA, Privacy Policy and Threat Assessment Criteria.
Preparation before removing .USA Files Virus.
Before starting the actual removal process, we recommend that you do the following preparation steps.
Make sure you have these instructions always open and in front of your eyes.
Do a backup of all of your files, even if they could be damaged. You should back up your data with a cloud backup solution and insure your files against any type of loss, even from the most severe threats.
Be patient as this could take a while.
Step 1: Boot Your PC In Safe Mode to isolate and remove .USA Files Virus
OFFER
Manual Removal Usually Takes Time and You Risk Damaging Your Files If Not Careful!
We Recommend To Scan Your PC with SpyHunter
Keep in mind, that SpyHunter’s scanner is only for malware detection. If SpyHunter detects malware on your PC, you will need to purchase SpyHunter’s malware removal tool to remove the malware threats. Read our SpyHunter 5 review. Click on the corresponding links to check SpyHunter’s EULA, Privacy Policy and Threat Assessment Criteria
1. Hold Windows key()+ R
2. The “Run” Window will appear. In it, type “msconfig” and click OK.
3. Go to the “Boot” tab. There select “Safe Boot” and then click “Apply” and “OK”.
Tip: Make sure to reverse those changes by unticking Safe Boot after that, because your system will always boot in Safe Boot from now on.
4. When prompted, click on “Restart” to go into Safe Mode.
5. You can recognise Safe Mode by the words written on the corners of your screen.
Step 2: Clean any registries, created by .USA Files Virus 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 .USA Files Virus 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.
Tip: To find a virus-created value, you can right-click on it and click “Modify” to see which file it is set to run. If this is the virus file location, remove the value.
Step 3: Find files created by .USA Files Virus
For Windows 8, 8.1 and 10. For Windows XP, Vista, and 7.
For Newer Windows Operating Systems
1: On your keyboard press + R and write explorer.exe in the Run text box and then click on the Ok button.
2: Click on your PC from the quick access bar. This is usually an icon with a monitor and its name is either “My Computer”, “My PC” or “This PC” or whatever you have named it.
3: Navigate to the search box in the top-right of your PC’s screen and type “fileextension:” and after which type the file extension. If you are looking for malicious executables, an example may be “fileextension:exe”. After doing that, leave a space and type the file name you believe the malware has created. Here is how it may appear if your file has been found:
N.B. We recommend to wait for the green loading bar in the navination box to fill up in case the PC is looking for the file and hasn’t found it yet.
For Older Windows Operating Systems
In older Windows OS’s the conventional approach should be the effective one:
1: Click on the Start Menu icon (usually on your bottom-left) and then choose the Search preference.
2: After the search window appears, choose More Advanced Options from the search assistant box. Another way is by clicking on All Files and Folders.
3: After that type the name of the file you are looking for and click on the Search button. This might take some time after which results will appear. If you have found the malicious file, you may copy or open its location by right-clicking on it.
Now you should be able to discover any file on Windows as long as it is on your hard drive and is not concealed via special software.
IMPORTANT! Before starting “Step 4”, please boot back into Normal mode, in case you are currently in Safe Mode. This will enable you to install and use SpyHunter 5 successfully.
Step 4: Scan for .USA Files Virus with SpyHunter Anti-Malware Tool
1. Click on the “Download” button to proceed to SpyHunter’s download page.
It is recommended to run a scan before purchasing the full version of the software to make sure that the current version of the malware can be detected by SpyHunter. Click on the corresponding links to check SpyHunter’s EULA, Privacy Policy and Threat Assessment Criteria.
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.
If any threats have been removed, it is highly recommended to restart your PC.
Gergana has completed a bachelor degree in Marketing from the University of National and World Economy. She has been with the STF team for three years, researching malware and reporting on the latest infections.
.USA Files Virus may remain persistent on your system and may re-infect it. We recommend you to download SpyHunter and run free scan to remove all virus files on your PC. This saves you hours of time and effort compared to doing the removal yourself.
Keep in mind, that SpyHunter’s scanner is only for malware detection. If SpyHunter detects malware on your PC, you will need to purchase SpyHunter’s malware removal tool to remove the malware threats. Read our SpyHunter 5 review. Click on the corresponding links to check SpyHunter’s EULA, Privacy Policy and Threat Assessment Criteria.
Preparation before removing .USA Files Virus.
Before starting the actual removal process, we recommend that you do the following preparation steps.
Make sure you have these instructions always open and in front of your eyes.
Be patient as this could take a while.
Step 1: Uninstall .USA Files Virus and related software from Windows
OFFER
Manual Removal Usually Takes Time and You Risk Damaging Your Files If Not Careful!
We Recommend To Scan Your PC with SpyHunter
Keep in mind, that SpyHunter’s scanner is only for malware detection. If SpyHunter detects malware on your PC, you will need to purchase SpyHunter’s malware removal tool to remove the malware threats. Read our SpyHunter 5 review. Click on the corresponding links to check SpyHunter’s EULA, Privacy Policy and Threat Assessment Criteria
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. To do that:
1. Hold the Windows Logo Button and “R” on your keyboard. A Pop-up window will appear.
2. In the field type in “appwiz.cpl” and press ENTER.
3. This will open a window with all the programs installed on the PC. Select the program that you want to remove, and press “Uninstall”
Follow the instructions above and you will successfully uninstall most programs.
Step 2: Clean your Browsers from .USA Files Virus.
Remove an extension from Mozilla FirefoxRemove an extension from Google Chrome Remove an extension from Internet Explorer Remove an extension from Microsoft Edge
1. Start Mozilla Firefox. Open the menu window
2. Select the “Add-ons” icon from the menu.
3. Select the unwanted extension and click “Remove“
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.
1. Start Google Chrome and open the drop menu
2. Move the cursor over “Tools” and then from the extended menu choose “Extensions“
3. From the opened “Extensions” menu locate the unwanted extension and click on its “Remove” button.
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.
1. Start Internet Explorer: 2. Click on the gear icon labeled ‘Tools’ to open the drop menu and select ‘Manage Add-ons’
3. In the ‘Manage Add-ons’ window.
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’.
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.
1. Start Edge
2. Open the drop menu by clicking on the icon at the top right corner.
3. From the drop menu select “Extensions”.
4. Choose the suspected malicious extension you want to remove and then click on the gear icon.
5. Remove the malicious extension by scrolling down and then clicking on Uninstall.
Step 3: Clean any registries, created by .USA Files Virus 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 .USA Files Virus 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.
Tip: To find a virus-created value, you can right-click on it and click “Modify” to see which file it is set to run. If this is the virus file location, remove the value.
IMPORTANT! Before starting “Step 4”, please boot back into Normal mode, in case you are currently in Safe Mode. This will enable you to install and use SpyHunter 5 successfully.
Step 4: Scan for .USA Files Virus with SpyHunter Anti-Malware Tool
1. Click on the “Download” button to proceed to SpyHunter’s download page.
It is recommended to run a scan before purchasing the full version of the software to make sure that the current version of the malware can be detected by SpyHunter. Click on the corresponding links to check SpyHunter’s EULA, Privacy Policy and Threat Assessment Criteria.
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.
If any threats have been removed, it is highly recommended to restart your PC.
Gergana has completed a bachelor degree in Marketing from the University of National and World Economy. She has been with the STF team for three years, researching malware and reporting on the latest infections.
.USA Files Virus may remain persistent on your system and may re-infect it. We recommend you to download Combo Cleaner and run free scan to remove all virus files on your Mac. This saves you hours of time and effort compared to doing the removal yourself.
Combo Cleaner’s scanner is free but the paid version is needed to remove the malware threats. Read Combo Cleaner’s EULA and Privacy Policy
Preparation Phase:
Before starting to follow the steps below, be advised that you should first do the following preparations:
Backup your files in case the worst happens.
Make sure to have a device with these instructions on standy.
Arm yourself with patience.
Step 1: Uninstall .USA Files Virus and remove related files and objects
OFFER
Manual Removal Usually Takes Time and You Risk Damaging Your Files If Not Careful!
We Recommend To Scan Your Mac with Combo Cleaner
Keep in mind, that Combo Cleaner needs to purchased to remove the malware threats. Click on the corresponding links to check Combo Cleaner’s EULA and Privacy Policy
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 .USA Files Virus:
Tip: To quit a process completely, choose the “Force Quit” option.
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 .USA Files Virus. 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 .USA Files Virus. 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”.
Step 2: Remove .USA Files Virus – related extensions from your Mac’s browsers
Remove a toolbar from Mozilla FirefoxRemove a toolbar from Google Chrome Remove an extension from Safari and reset it.
1. Start Mozilla Firefox. Open the menu window
2. Select the “Add-ons” icon from the menu.
3. Select the Extension and click “Remove“
4. After the extension is removed, restart Mozilla Firefox by closing it from the red “X” in the top right corner and start it again.
1. Start Google Chrome and open the drop menu
2. Move the cursor over “Tools” and then from the extended menu choose “Extensions“
3. From the opened “Extensions” menu locate the add-on and click on the garbage bin icon on the right of it.
4. After the extension is removed, restart Google Chrome by closing it from the red “X” in the top right corner and start it again.
1. Start Safari
2. After hovering your mouse cursor to the top of the screen, click on the Safari text to open its drop down menu.
3. From the menu, click on “Preferences“
4. After that, select the ‘Extensions’ Tab
5. Click once on the extension you want to remove.
6. Click ‘Uninstall’
A pop-up window will appear asking for confirmation to uninstall the extension. Select ‘Uninstall’ again, and the .USA Files Virus will be removed.
How to Reset Safari
IMPORTANT: Before resetting Safari make sure you back up all your saved passwords within the browser in case you forget them.
Start Safari and then click on the gear leaver icon.
Click the Reset Safari button and you will reset the browser.
Step 3: Scan for and remove .USA Files Virus files from your Mac
When you are facing problems on your Mac as a result of unwanted scripts and programs such as .USA Files Virus, 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.
Gergana has completed a bachelor degree in Marketing from the University of National and World Economy. She has been with the STF team for three years, researching malware and reporting on the latest infections.
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For Windows 8, 8.1 and 10.
For Windows XP, Vista, and 7.
Remove an extension from Mozilla Firefox
Remove an extension from Google Chrome
Remove an extension from Internet Explorer
Remove an extension from Microsoft Edge
Remove an extension from Safari and reset it.
