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 malware
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Malware Removal Tool
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User Experience | Join Our Forum to Discuss .USA Files Virus. |
| Data Recovery Tool | 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:
→ HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\RunOnce
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\RunOnce
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 ([wplinkpreview url=”https://sensorstechforum.com/combo-files-virus-dharma-ransomware-remove-restore-files/”].combo, [wplinkpreview url=” https://sensorstechforum.com/adobe-files-virus-dharma-remove/”].adobe, [wplinkpreview url=”https://sensorstechforum.com/bkp-files-virus-dharma-ransomware-remove-restore-data/”].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 [wplinkpreview url=”https://sensorstechforum.com/the-most-popular-free-anti-ransomware-tools/”]anti-ransomware tool.
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 Ivanova
Highly motivated writer with 5+ years of experience writing for ransomware, malware, adware, PUPs, and other cybersecurity-related issues. As a writer, I strive to create content that is based on thorough technical research. I find joy in the process of creating articles that are easy to understand, informative, and useful. Follow me on Twitter (@IRGergana) for the latest in the field of computer, mobile, and online security.
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Step 1: Scan for .USA Files Virus with SpyHunter Anti-Malware Tool
Ransomware Automatic Removal - Video Guide
Step 2: Uninstall .USA Files Virus and related malware 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. To do that:
Follow the instructions above and you will successfully delete most unwanted and malicious programs.
Step 3: Clean any registries, created by .USA Files Virus on your computer.
The usually targeted registries of Windows machines are the following:
- HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run
- HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
- HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\RunOnce
- HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\RunOnce
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:
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.
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: Boot Your PC In Safe Mode to isolate and remove .USA Files Virus
Step 5: Try to Restore Files Encrypted by .USA Files Virus.
Method 1: Use STOP Decrypter by Emsisoft.
Not all variants of this ransomware can be decrypted for free, but we have added the decryptor used by researchers that is often updated with the variants which become eventually decrypted. You can try and decrypt your files using the instructions below, but if they do not work, then unfortunately your variant of the ransomware virus is not decryptable.
Follow the instructions below to use the Emsisoft decrypter and decrypt your files for free. You can download the Emsisoft decryption tool linked here and then follow the steps provided below:
1 Right-click on the decrypter and click on Run as Administrator as shown below:
2. Agree with the license terms:
3. Click on "Add Folder" and then add the folders where you want files decrypted as shown underneath:
4. Click on "Decrypt" and wait for your files to be decoded.
Note: Credit for the decryptor goes to Emsisoft researchers who have made the breakthrough with this virus.
Method 2: Use data recovery software
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 a data recovery method that may help you go around direct decryption and try to restore your files. Bear in mind that this method may not be 100% effective but may also help you a little or a lot in different situations.
Simply click on the link and on the website menus on the top, choose Data Recovery - Data Recovery Wizard for Windows or Mac (depending on your OS), and then download and run the tool.
.USA Files Virus-FAQ
What is .USA Files Virus Ransomware?
.USA Files Virus is a ransomware infection - the malicious software that enters your computer silently and blocks either access to the computer itself or encrypt your files.
Many ransomware viruses use sophisticated encryption algorithms to make your files inaccessible. The goal of ransomware infections is to demand that you pay a ransom payment to get access to your files back.
What Does .USA Files Virus Ransomware Do?
Ransomware in general is a malicious software that is designed to block access to your computer or files until a ransom is paid.
Ransomware viruses can also damage your system, corrupt data and delete files, resulting in the permanent loss of important files.
How Does .USA Files Virus Infect?
Via several ways..USA Files Virus Ransomware infects computers by being sent via phishing emails, containing virus attachment. This attachment is usually masked as an important document, like an invoice, bank document or even a plane ticket and it looks very convincing to users.
Another way you may become a victim of .USA Files Virus is if you download a fake installer, crack or patch from a low reputation website or if you click on a virus link. Many users report getting a ransomware infection by downloading torrents.
How to Open ..USA Files Virus files?
You can't without a decryptor. At this point, the ..USA Files Virus files are encrypted. You can only open them once they are decrypted using a specific decryption key for the particular algorithm.
What to Do If a Decryptor Does Not Work?
Do not panic, and backup the files. If a decryptor did not decrypt your ..USA Files Virus files successfully, then do not despair, because this virus is still new.
Can I Restore "..USA Files Virus" Files?
Yes, sometimes files can be restored. We have suggested several file recovery methods that could work if you want to restore ..USA Files Virus files.
These methods are in no way 100% guaranteed that you will be able to get your files back. But if you have a backup, your chances of success are much greater.
How To Get Rid of .USA Files Virus Virus?
The safest way and the most efficient one for the removal of this ransomware infection is the use a professional anti-malware program.
It will scan for and locate .USA Files Virus ransomware and then remove it without causing any additional harm to your important ..USA Files Virus files.
Can I Report Ransomware to Authorities?
In case your computer got infected with a ransomware infection, you can report it to the local Police departments. It can help authorities worldwide track and determine the perpetrators behind the virus that has infected your computer.
Below, we have prepared a list with government websites, where you can file a report in case you are a victim of a cybercrime:
Cyber-security authorities, responsible for handling ransomware attack reports in different regions all over the world:
Germany - Offizielles Portal der deutschen Polizei
United States - IC3 Internet Crime Complaint Centre
United Kingdom - Action Fraud Police
France - Ministère de l'Intérieur
Italy - Polizia Di Stato
Spain - Policía Nacional
Netherlands - Politie
Poland - Policja
Portugal - Polícia Judiciária
Greece - Cyber Crime Unit (Hellenic Police)
India - Mumbai Police - CyberCrime Investigation Cell
Australia - Australian High Tech Crime Center
Reports may be responded to in different timeframes, depending on your local authorities.
Can You Stop Ransomware from Encrypting Your Files?
Yes, you can prevent ransomware. The best way to do this is to ensure your computer system is updated with the latest security patches, use a reputable anti-malware program and firewall, backup your important files frequently, and avoid clicking on malicious links or downloading unknown files.
Can .USA Files Virus Ransomware Steal Your Data?
Yes, in most cases ransomware will steal your information. It is a form of malware that steals data from a user's computer, encrypts it, and then demands a ransom in order to decrypt it.
In many cases, the malware authors or attackers will threaten to delete the data or publish it online unless the ransom is paid.
Can Ransomware Infect WiFi?
Yes, ransomware can infect WiFi networks, as malicious actors can use it to gain control of the network, steal confidential data, and lock out users. If a ransomware attack is successful, it could lead to a loss of service and/or data, and in some cases, financial losses.
Should I Pay Ransomware?
No, you should not pay ransomware extortionists. Paying them only encourages criminals and does not guarantee that the files or data will be restored. The better approach is to have a secure backup of important data and be vigilant about security in the first place.
What Happens If I Don't Pay Ransom?
If you don't pay the ransom, the hackers may still have access to your computer, data, or files and may continue to threaten to expose or delete them, or even use them to commit cybercrimes. In some cases, they may even continue to demand additional ransom payments.
Can a Ransomware Attack Be Detected?
Yes, ransomware can be detected. Anti-malware software and other advanced security tools can detect ransomware and alert the user when it is present on a machine.
It is important to stay up-to-date on the latest security measures and to keep security software updated to ensure ransomware can be detected and prevented.
Do Ransomware Criminals Get Caught?
Yes, ransomware criminals do get caught. Law enforcement agencies, such as the FBI, Interpol and others have been successful in tracking down and prosecuting ransomware criminals in the US and other countries. As ransomware threats continue to increase, so does the enforcement activity.
About the .USA Files Virus Research
The content we publish on SensorsTechForum.com, this .USA Files Virus how-to removal guide included, is the outcome of extensive research, hard work and our team’s devotion to help you remove the specific malware and restore your encrypted files.
How did we conduct the research on this ransomware?
Our research is based on an independent investigation. We are in contact with independent security researchers, and as such, we receive daily updates on the latest malware and ransomware definitions.
Furthermore, the research behind the .USA Files Virus ransomware threat is backed with VirusTotal and the NoMoreRansom project.
To better understand the ransomware threat, please refer to the following articles which provide knowledgeable details.
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- Always check "About Us" web page.
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