Qscx is a deadly virus that belongs to ransomware family of Stop/DJVU. This threat is notorious in locking majority of computer user’s files by encrypting them with complex algorithmic pattern. In addition, the virus appends .qscx files extension to encrypted data. Once it has completed locking the entire target pool of data, Qscx ransomware is going to ask victims for payment in exchange for the decryption tool and unique key.
How Qscx virus infects the computer?
Majority of victims are not aware how their computer was infected with Qscx ransomware. Normally, this type of virus is attached to spam email messages, malicious software bundles, or fake software updates that are obtained from suspicious sources. In addition, web injectors and malicious pop-up advertisements are counted as extra conduit for the successful deployment of Qscx ransomware.
Of all the above-mentioned techniques, there is a surge of infection cases through spam email campaign. Probably, it was because attackers can send copies of the virus to thousands of recipients daily. The messages where Qscx ransomware is attached are disguising as valid correspondent or digital letter from a prominent organization especially business entities. The email covers topic as product inquiry, payment procedure, taxation, shipping details, and other things that are relevant to work and business dealing. Because of the short notice on the message body, recipients are enticed to look at the complete details, which are inside the attached files. So, as soon as email user opens the file, Qscx ransomware initiates the attack and starts to drop files on the computer including the ransomware itself.
Qscx File encryption and decryption
Qscx ransomware looks for target files and encrypts them with sophisticated technique while employing a unique key obtained from a remote server. Two keys were generated for this attack, one at the hacker’s sever, and the other one is on the infected computer. These two must match using a decryption software, so, breaking the code would be impossible. Attackers are offering to decrypt all .qscx files for a steep price of $490 – $980. This will serve as payment for the Qscx decryption tool and private key that are both needed to recover all encrypted files. These statements are all covered on the ransom note file _readme.txt as shown below.
| Threat Name | Qscx Ransomware, Stop, DJVU |
|---|---|
| Threat Type | Crypto-virus, File Locker, Encryption Virus |
| File Extension | .qscx |
| Ransom Amount | $490 – $980 |
| Ransomware Note File | _readme.txt |
| Discovered by | @dnwls0719 |
| Virus Alias | AegisLab : Trojan.Win32.Generic.lCNY AhnLab-V3 : Trojan/Win.Generic.R425626 Alibaba : Trojan:Win32/Kryptik.1e45db0c ALYac : Trojan.Ransom.Stop Avast : Win32:PWSX-gen BitDefender : Trojan.GenericKD.46480149 ClamAV : Win.Malware.Filerepmalware-9871262-0 DrWeb : Trojan.Siggen13.56076 Emsisoft : Trojan.Crypt (A) eScan : Trojan.GenericKD.46480149 ESET-NOD32 : A Variant Of Win32/Kryptik.HLIK Fortinet : W32/Kryptik.TR!tr Ikarus : Trojan.Win32.Glupteba Kaspersky : HEUR:Trojan-Ransom.Win32.Stop.gen McAfee : GenericRXOW-EN!8B3072889EA3 Microsoft : Trojan:Win32/Azorult.RM!MTB Sophos : ML/PE-A + Troj/Kryptik-TR Symantec : ML.Attribute.HighConfidence VBA32 : BScope.Trojan.Sabsik.FL Webroot : W32.Trojan.Gen |
Backup your files
One important step before proceeding with the procedures below is to backup your files. Ransomware attacks are not the same. Each has its own unique set of payloads, aside from encrypting the files with a complex method. Others tend to delete the infected files after a certain period, while others keep them concealed in hidden places. In addition, ransomware decryption tools are not guaranteed to be perfect, and there are instances where files suffer from damages during the decryption process.
So, it is better to create a backup copy of your entire Qscx-encrypted files right now.
Qscx Ransomware Removal Guide
The first thing to do is remove the Qscx virus before attempting the decryption. Remember that as long as the ransomware is active, it will repeatedly encrypt the files on the compromised computer.
Instant Removal : Scan the computer with antivirus program
Combo Cleaner is a trusted computer security and optimization tool equipped with a powerful virus and malware detection engine. This program can get rid of ransomware like Qscx through this procedure.
1. Download the application from the following page:
2. Save the file to your preferred location.
3. Double-click the downloaded file CCSetup.exe and install with the default settings.
4. At the end of the setup process, click Finish to run Combo Cleaner.
5. The tool will update the database file; please wait for this process to complete.
6. To begin checking for threats like Qscx, click on the Start Scan button. Wait for this scan to finish.
7. At the end of the scan process, click on Remove all threats to delete Qscx, including all harmful objects from the computer.
To fully optimize the features of antivirus and privacy scanners, users may have to upgrade to the premium version.
Please continue with the succeeding removal procedures if you are comfortable manually getting rid of the ransomware and malicious items linked to it.
Manual Removal : Steps to get rid of Qscx
Infection with the Qscx ransomware virus is dangerous to the system because it can inject files that run each time Windows starts. To prevent malicious files from loading, the Windows operating system must run with minimal processes, and this can be done through SafeMode With Networking.
The procedure may require you to close the browser or restart the computer; therefore, we are suggesting to Bookmark or Print this page.Step 1 : Start Windows in Safe Mode With Networking
The method of running Windows in Safe Mode before deleting files, ending system processes, and virus scanning is effective in getting rid of Qscx. This routine can prevent most viruses and malware from loading, making it easier to detect and remove them.
1. On the Windows Search bar, please type msconfig.
2. Select and open System Configutation on the list of found results.
3. Once you are in the System Configuration window, go to the Boot tab.
4. Under the Boot Options area, please check Safe Boot so that it starts in Safe Mode after restarting.
5. Next, select Network. This will allow Windows to boot in Safe Mode with Networking.
6. Lastly, click on Apply and OK to save the changes.
7. Please restart Windows. The system should run in Safe Mode after the reboot.
Do not forget to restore the normal boot process of Windows after this process. Simply repeat the method above, and this time, uncheck the Safe Boot option to run Windows normally.Step 2 : Scan the Computer with Sophos Home Antivirus
Ransomware files are placed deeply into the system and on various locations, thus, thorough scanning is vital to totally remove Qscx virus. Aside from our suggested tool, you may also run your own security program.
To remove Qscx ransomware files, scanning the computer with this efficient antivirus tool is suggested. This scanner does not just uncover known threats like viruses or malware, it is also effective in discovering hazardous ransomware like Qscx.
1. Please click on the link below to download the program.
2. After downloading, locate the file SophosInstall.exe in the Downloads folder.
3. Install by double-clicking on the file.
4. If it prompts "Do you want to allow this app to make changes on your device?" please click Yes.
5. Next, it will display the Terms and Conditions page. Click the Install button to begin.
6. Run the installation with the default settings. Please note that an internet connection is required in order to download important updates.
7. After finishing the installation, you must login to the dashboard. If you already have a Sophos account, please login. Otherwise, please enter your details and click on the Create Account button.
8. Once you are in the Sophos Home console, click the Scan button to start checking the computer for Qscx components.
9. Scanning may take a while; please wait for this process to finish.
10. After scanning the computer, Sophos Home will start cleaning or deleting files infected with Qscx.
11. You may now close Sophos Home. The computer is now free from Qscx, as well as associated malware and viruses.
The above procedures should have totally eliminated Qscx ransomware. However, if you find that there are still remnants of the virus, please proceed to the next steps below.
Step 3 : Double Check with Windows Security Apps
Microsoft Windows has a built-in security application that you can use to double-check if your computer is still infected with Qscx. For Windows 10/11 users, please run Windows Security.
Windows 10 / 11 Instructions:
Windows Security is a free tool that was built to help you remove Qscx, viruses, and other malicious items from Windows 10/11 systems. Follow these procedures to scan your computer with the tool:
1. Tap or click the Search charm and search for Windows Security
2. Click Open to run the program.
3. On the Dashboard, click Virus and threat protection from the sidebar.
4. On the right panel, click on Scan Options to see different levels of checking the computer.
5. Next, please select Full Scan button.
6. Lastly, click on the Scan now button to start scanning for the presence of Qscx. The process may take a while to complete.
7. After the scan, Delete/Quarantine identified threats, whether they were relevant to Qscx or not. You may now restart Windows to complete the virus removal process.
For Windows 8.1 and Windows 7, you can scan the computer for free with the Microsoft Malicious Software Removal Tool (MSRT 64-Bit). It is a stand-alone virus scanner tool that targets prevalent malware groups.Recover Files from Qscx Ransomware Infection
In this section, we will provide ways to decrypt files infected with Qscx ransomware. Aside from dedicated decryption software and common tools, other options for file recovery are provided. As much as we can, we will update this area whenever a new and more suitable decryption tool becomes available.
Find a suitable Qscx decryption tool from Emsisoft
This service from Emsisoft is helpful in unlocking encrypted files without paying a ransom. The page provides a list of ransomware decryption tools. All you have to do is look for the specific tool and start recovering the Qscx-encrypted file.
How to protect the computer from Qscx ransomware?
After the ransomware is removed, it is important to prevent similar incidents from happening again. To effectively protect the computer, the user must know how Qscx ransomware was able to infect it. To minimize the possibility of infection, staying away from the common sources of this virus is crucial.
How does ransomware infect your computer?
The method of infecting the computers was found to be similar to that of other common viruses. Ransomware like Qscx is seen to have efficient deployment via spam email messages, web injectors, malicious software installers, misleading online advertisements, and Trojan Downloaders.
Once the virus is executed, it immediately infects the system. Then, Qscx ransomware communicates with a remote server so that a unique key can be generated for a specific computer. After acquiring the key, it starts to decrypt target files using a complex method that is almost unbreakable. In the final stage of the attack, Qscx ransomware demands ransom money in exchange for the decryption tool. To further understand the attack scheme, we have included an infographic below.
What are the essential things to do?
Do a Regular File Back-up - Always backup your data on a separate storage devices such as external hard drives, optical discs, or online backup services.
Keep Your Software Updated - Make sure that you have the latest software updates especially on the operating system. Recent updates often contain vital security patches to help protect the computer against all forms of threats.
Install a Security Program - Protect the computer with effective anti-virus application using efficient real-time scanning. Regularly run a complete scan to check the computer for presence of malware.
Protect your files with Controlled Folder Access (Windows 10/11)
For Windows 10/11 users, aside from protecting the computer using anti-virus or anti-malware programs, one way to protect against ransomware attacks is by using Controlled Folder Access. This feature of Windows Defender Security Center may not prevent the Qscx ransomware infection, but it can protect folders and files in general. Follow the steps to enable Controlled Folder Access in Windows 10/11.
1. Go to Windows Search and type Windows Security.
2. Open Windows Security to see all the options.
3. Click Virus and Threat Protection, either on the sidebar or on the main panel.
4. Scroll down to the "Ransomware Protection" area, and click on Manage Ransomware Protection.
5. In the "Controlled Folder Access" section, turn the slider to On. This will enable the feature and protect the folder against Qscx virus or any type of ransomware.
6. Click on Protected Folders to see the list of included folders. If Windows displays a message, "Do you want to allow this app to make changes to your device?" please click Yes to proceed.
7. Click on the Add a Protected Folders button to include additional folders. Make sure that folders with important files are included in the list.
Troubleshooting Guide
Certain programs may be blocked by the Controlled Folder Access feature. To fix the issue, simply have the specific program whitelisted.
1. Under the "Controlled Folder Access" section, click Allow an app through Controlled folder access.
2. If Windows displays the message "Do you want to allow this app to make changes to your device?" click Yes to continue.
3. Next, click the Add an allowed app button.
4. Lastly, click on the Recently blocked app and remove the program from the list of blocked applications.
This Controlled Folder Access feature is one way to protect files against Qscx ransomware. Other important things to do to keep files safe against ransomware are early prevention, like keeping programs updated, installing an efficient security program, and doing regular file backups on a separate media drive.
System Compatibility Notice
We ensured that our method to get rid of Qscx is compatible with the majority of Microsoft operating systems (Windows 7, Windows Vista, Windows 8, Windows 10, and Windows 11). To prevent complicated steps, the commands used in the instructions are common, useful, and tested. If you encounter any compatibility problems when following this tutorial, please message us or leave your comment below, and we will reply and make the required modifications.
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