Sqpc ransomware: what it is and how to remove it
Sqpc ransomware is yet a very fresh detection that started its activities at the beginning of May 2020. People on Reddit reported a never-seen-before .sqpc file extension appended to non-system files stored on the affected machine.
Facts checked October 6, 2026. Removal steps tested on Windows 11 (26H2) and checked against Microsoft's and the browser makers' current documentation. Sections marked as our earlier report are the original text: they describe the threat as it was then and have not been reviewed since. The 2026 status, the removal steps and the questions are current.
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Sqpc ransomware: summary
| Detection names | No Microsoft detection name is known |
|---|---|
| Ransom note | _readme.txt |
| Contact | helpmanager@mail.ch, restoremanager@firemail.cc |
| Encrypted file extension | .sqpc |
| Decryptor | No free decryptor is known for this variant; check No More Ransom (nomoreransom.org) for updates |
| Distribution | Not recorded in the old report |
| Removal | Scan the PC with security software to find and remove the malware and anything installed with it. Fortect scans Windows for malware and repairs the system files and settings it damaged. Remove it nowTo use the full-featured product, you have to purchase a license for Fortect. The scan is free. |
Show 10 more facts
| Damage | Not recorded in the old report |
|---|---|
| Name | Sqpc ransomware |
| Type | File-encrypting ransomware |
| Symptoms | Files renamed with a new extension and a ransom note left in folders |
| Evidence | 5 write-ups by security sites; no sample analysed yet |
| Encrypted files | .sqpc |
| Attacker contacts | helpmanager@mail.ch |
| Free decryptor | No free decryptor is known (checked 6 October 2026) |
| First seen | 7 May 2020 |
| Facts checked | 6 October 2026 |
- File extension:
.sqpc - Note file:
_readme.txt - Contact:
helpmanager@mail.ch
From our report of May 2020 · not reviewed since
More from our earlier report on Sqpc ransomware
- The ransomware belongs to the infamous STOP/Djvu family
- Upon infiltration locks personal files and demands to pay the ransom.
- Sever system's modifications are also implemented.
- It can also contain multiple payloads and work as a backdoor for other viruses
- The criminals behind this malicious piece of malware are usually using social engineering techniques allowing them to spread it via spam.
- Alternatively, its payload may be launched via unprotected remote desktop tools, brute force attacks or launched as a secondary payload of a trojan
- First of all, copy the encrypted files to a USB flash drive or alternative storage and then remove sqpc ransomware from the system.
- After that, you can try STOPdecrypter.
- If it uses offline keys, then there is a high chance that the software retrieves your files.
- Otherwise, file decryption is possible by paying the ransom, which is not recommended
- Get rid of the ransomware using a professional anti-virus program.
- According to victims, the ransomware is usually detected alongside other cyber infections, including trojans, adware, malware, and spyware.
- Dangerous cyber infections not only seek to extort money from people but also affect their PCs by compromising system files and increasing vulnerability.
- To fix any system damage, use tool.
How Sqpc ransomware behaves
From our report of May 2020 · not reviewed since
Sqpc file-locking virus that belongs to the infamous STOP/Djvu ransomware family
Sqpc ransomware is yet a very fresh detection that started its activities at the beginning of May 2020.
People on Reddit reported a never-seen-before .sqpc file extension appended to non-system files stored on the affected machine. Although the analysis of this malware is still in progress, researches have already attributed it to the STOP/Djvu ransomware family as they are built on similar malicious code and have the template features of the mentioned crypto locker.
Despite some minimal differences, such as .sqpc file extension and _readme.txt, the virus spreads via spam, locks files using AES encryption, and then demands to pay either $490 or $980 ransom depending on the reaction time.
Although there some of the Djvu ransomware variants can be decrypted with a free Emsisoft's decryption software , the versions including Sqpc cannot be decrypted, at least not yet. The versions released after August 2019 are only decryptable if an offline key was used.
Sqpc virus belongs to the group of cyber infections that are extremely dangerous. Ransomware in its nature is programmed in a way to perform multiple activities to decrease the system's performance, increase its vulnerability, and induce its user into paying the ransom.
Schematically every cryptovirus works in a more or less similar manner. Sqpc ransomware unravels in stages. As soon as it gets to the system, it installs into Windows Startup and injected obfuscated entries into Windows Registry. After that, it downloads additional files known as 1.exe, 2.exe, 3.exe, and pdatewin.exe.
The purpose of these files is diverse, i.e. while one is responsible for terminating security tools, the others modify host files, connect to the C2 server, and, in general, have to heat the engines for sqpc cipher.
The successful launch ends up in a complete file lock. The virus appends .sqpc suffix to each file positioned on the infected computer. The victim is also presented with a ransom note _readme.txt, which contains instructions for the victim explaining what has happened and how to pay the ransom.
Criminals expect the victim to return to them within 72 hours. In this case, extortionists will charge the decryptor for $490, whereas later the price doubles and becomes $980.
However, the presence of the ransomware may not be manifested by encrypted files. As pointed out by a victim on Reddit, the first sign of a virus present on the system was suspicious IPlogger websites popping up on the screen randomly. Besides, the system turned slow and exhibited extremely high CPU consumption.
If any signs of a virus occur, do not postpone a full system scan with the anti-virus program. The longer you wait, the more damage the malicious software can cause.
This ransomware typically affects poorly protected PCs and may find a backdoor to it because of already existing trojan or spyware infection. To remove Sqpc virus from the system, use a really professional anti-virus program, which features a high detection rate and powerful removal engine.
Paying the ransom is not the right solution. Lucky those who have data backups. In this case, there are no worries as all you have to do is to remove Sqpc ransomware while the system is rebooted in the Safe Mode and then retrieve your files from backups.
This tool is free to use, so it's worth giving a try. It has already saved thousands of people from paying for the extortionists. Besides, there are several third-party data recovery tools that can be helpful.

From our report of May 2020 · not reviewed since
Treat spam emails with carefulness to avoid ransomware attacks
As explained by security experts from novirus.en , this ransomware has more than one dissemination strategy.
In general, all methods are extremely stealthy and designed in a way to make less IT-savvy people hook on the bite. The following ways to spread ransomware are the most common:
Although there are methods that criminals may use, the above mentioned are the most frequently used. There is no one-method protection to avoid ransomware attacks. First of all, ensure a comprehensive system's security so that it won't have easily exploitable vulnerabilities. Besides, be very cautious when browsing the web and checking email attachments even if they come from a seemingly reliable sender.
- Spam email attachments. Criminals craft malspam campaigns, which are implemented with the help of bots. Tens of thousands of infected emails are sent to random (or sometimes targeted) email accounts with an expectation that some of the attachments will be opened. The messages are usually created in an accurate manner to look as reliable as possible. In the disguise of governmental institutions, courier companies, or organizations, criminals push potential victims to click on .zip, .exe, .pdf, or other attachments carrying ransomware payload.
- Another medium for ransomware to spread is game cracks and keygens . Such pirated software allows the community to play games for free by cracking license keys. However, illegal software is frequently bundled with ransomware payload, which is executed as soon as the crack is opened.
- Phishing websites may spread ransomware via infected software updates. Landing on a hacked website may be extremely dangerous. In most of the cases, people get redirected to dangerous websites unintentionally by clicking on suspicious links positioned on pornographic websites. Another reason may be an infection of an aggressive browser hijacker.

The Sqpc ransomware note
ATTENTION!
Don't worry, you can return all your files!
All your files like photos, databases, documents and other important are encrypted with strongest encryption and unique key.
The only method of recovering files is to purchase decrypt tool and unique key for you.
This software will decrypt all your encrypted files.
What guarantees you have?
You can send one of your encrypted file from your PC and we decrypt it for free.
But we can decrypt only 1 file for free. File must not contain valuable information.
You can get and look video overview decrypt tool:
hxxps://we.tl/t-xcn1Dtzak4
Price of private key and decrypt software is $980.
Discount 50% available if you contact us first 72 hours, that's price for you is $490.
Please note that you'll never restore your data without payment.
Check your e-mail "Spam" or "Junk" folder if you don't get answer more than 6 hours.
To get this software you need write on our e-mail:
helpmanager@mail.ch
Reserve e-mail address to contact us:
restoremanager@firemail.cc
Your personal ID:
How to remove Sqpc ransomware
Tools you'll need
All of these are free except where noted. Download them on a clean device if the infected PC is offline.
- A USB stick: to keep the ransom note, two or three encrypted files and screenshots off the infected PC.
- Microsoft Defender Offline: built into Windows 11 and Windows 10; scans before Windows starts, so running malware cannot hide.
- Microsoft Safety Scanner: a second, portable scanner with current signatures; each download works for 10 days.
- ID Ransomware: identifies the family from the note and one encrypted file and says whether a decryptor exists.
- No More Ransom: the free decryptors from police and security companies; check it again every few months.
- Fortect (optional): scans Windows for malware and repairs the system files and settings it damaged. The free scan is in the box above.
How to remove Sqpc ransomware and get your files back
Work in this order.
Disconnecting comes first, removal comes before any restore, and nothing here asks you to contact the attackers.
Step 1: Disconnect the PC and unplug backup drives
Sqpc ransomware encrypts everything it can reach, including drives and shares you connect later. Cut the network first: cable out, or Wi-Fi off from the taskbar.
Then unplug every USB stick and backup disk and pause cloud sync, so the encrypted versions do not replace your online copies. Do not reconnect any of them until the ransomware is removed from the Windows 11 or Windows 10 PC.

Windows 11: turn off Wi-Fi to take the PC offline. Full procedure with screenshots: Ransomware: first steps, finding a decryptor and recovering files
Step 2: Save the ransom note and confirm the family
Copy
_readme.txtand one or two files ending in.sqpcto a USB stick, and leave the originals where they are.From another device, upload the note and a sample file to ID Ransomware or No More Ransom's Crypto Sheriff, which name the family from the note, the extension and the file structure.
Write down the contact address and your personal ID from the note, because a decryptor or the police may ask for them.
Warning: Never contact the attackers from the infected Windows 11 or Windows 10 PC.

Windows 11: the ransom note and encrypted files to copy for identification. Full procedure with screenshots: Ransomware: first steps, finding a decryptor and recovering files
Step 3: Check for a free decryptor
For Sqpc ransomware, no free decryptor is known (checked 6 October 2026). Search the family name in the No More Ransom decryption tools list and in the free decryptors of Emsisoft, Avast and Kaspersky, because new tools appear years after an attack.
Important: Keep the encrypted files even if nothing works today, and do not pay before every free option is ruled out: payment does not guarantee a working key.
Decryptors run on Windows 11 and Windows 10, but only after the ransomware itself is removed.
Full procedure with screenshots: Ransomware: first steps, finding a decryptor and recovering files
Step 4: Remove the ransomware before you restore or decrypt
Restoring or decrypting files while Sqpc ransomware still runs lets it encrypt them again. Run a Full scan in Windows Security > Virus & threat protection > Scan options, then the Microsoft Defender Antivirus (offline scan).
If the ransomware blocks Windows Security, start Safe Mode with Networking and scan from there. Some families install a password stealer as well, so let both scans finish on Windows 11 or Windows 10.

Windows 11: Windows Security > Virus & threat protection > Scan options. Full procedure with screenshots: Run a Microsoft Defender Offline scan
Step 5: Look for shadow copies of the files
Open Command Prompt as administrator and run
vssadmin list shadows. If it lists copies dated before the attack, right-click a folder with encrypted files in File Explorer, choose Properties > Previous Versions, and open or restore a version from before that date.ShadowExplorer, a free tool, shows the same copies when the tab is empty or hidden. Most current families delete shadow copies, so an empty list is normal, but the check takes two minutes on Windows 11 or Windows 10.

Windows 11: vssadmin list shadows shows whether shadow copies exist. Full procedure with screenshots: Ransomware: first steps, finding a decryptor and recovering files
Step 6: Restore the files from a backup or recover deleted originals
Restore from an external backup, File History or OneDrive's version history, choosing a date before the attack. Connect the backup drive only after the scans are clean, or the ransomware encrypts it too.
If there is no backup, file recovery software can sometimes find the deleted originals, because some ransomware writes an encrypted copy and deletes the original file.
Stop writing to the drive and try recovery on Windows 11 or Windows 10 before new files overwrite the space.
Full procedure with screenshots: Recover deleted files (Recycle Bin, backups, OneDrive) On uGetFix
Instructions for each browser and system
The detailed steps for every browser and system this guide covers. Open the one you use.
Manual removal using Safe Mode
Important! →
Manual removal guide might be too complicated for regular computer users. It requires advanced IT knowledge to be performed correctly (if vital system files are removed or damaged, it might result in full Windows compromise), and it also might take hours to complete. Therefore, we highly advise using the automatic method provided above instead.
Step 1. Access Safe Mode with Networking
Manual malware removal should be best performed in the Safe Mode environment.
Windows 7 / Vista / XP
- Click Start > Shutdown > Restart > OK.
- When your computer becomes active, start pressing F8 button (if that does not work, try F2, F12, Del, etc. - it all depends on your motherboard model) multiple times until you see the Advanced Boot Options window.
- Select Safe Mode with Networking from the list.

Windows 10 / Windows 8
- Right-click on Start button and select Settings.

- Scroll down to pick Update & Security.

- On the left side of the window, pick Recovery.
- Now scroll down to find Advanced Startup section.
- Click Restart now.

- Select Troubleshoot.
- Go to Advanced options.

- Select Startup Settings.

- Press Restart.
- Now press 5 or click 5) Enable Safe Mode with Networking.

Step 2. Shut down suspicious processes
Windows Task Manager is a useful tool that shows all the processes running in the background. If malware is running a process, you need to shut it down:
- Press Ctrl + Shift + Esc on your keyboard to open Windows Task Manager.
- Click on More details.

- Scroll down to Background processes section, and look for anything suspicious.
- Right-click and select Open file location.

- Go back to the process, right-click and pick End Task.

- Delete the contents of the malicious folder.
Step 3. Check program Startup
- Press Ctrl + Shift + Esc on your keyboard to open Windows Task Manager.
- Go to Startup tab.
- Right-click on the suspicious program and pick Disable.

Step 4. Delete virus files
Malware-related files can be found in various places within your computer. Here are instructions that could help you find them:
- Type in Disk Cleanup in Windows search and press Enter.

- Select the drive you want to clean (C: is your main drive by default and is likely to be the one that has malicious files in).
- Scroll through the Files to delete list and select the following:
Temporary Internet Files
Downloads
Recycle Bin
Temporary files - Pick Clean up system files.

- You can also look for other malicious files hidden in the following folders (type these entries in Windows Search and press Enter):
%AppData%
%LocalAppData%
%ProgramData%
%WinDir%
After you are finished, reboot the PC in normal mode.
From our report of May 2020 · not reviewed since
The elimination process of Sqpc ransomware
SQPC ransowmare can result in huge losses of personal files and money.
File encrypting malware does not filter its victims. It attacks poorly protected systems and makes them even more compromised. Windows registry, startup, processes, and other components can be seriously affected by turning Windows sluggish, unresponsive, and full of errors.
However, the biggest problem is the encrypted personal files. Extortionists seek the one thing - receive the payment. However, it's not advisable due to the disclosure of personal details and possible identity theft.
Instead, it's advisable to remove Sqpc ransomware with , , or another professional anti-virus program and then try alternative data recovery methods. As we have pointed out, there is an official STOPdecryptor, which is can decrypt some of the Djvu ransomware variants.
Last, but not least, do not forget to restore the system's performance. Windows registries and other components can be recovered with the help of tool.
[GI=method-1]The successful Sqpc removal is possible while in Safe Mode with Networking. Follow this guide to enable this mode:
[GI=method-2]You can try to restore your computer to the state prior to the ransomware attack by enabling Window's previous version. Try to disable .Sqpc file virus with the help of these steps.
Before launching its scanner, remove the ransomware from the system and then follow this guide to enable the tool.
Use Windows Previous version
Note that this software works only if you have enabled the System Restore feature in the past.
Volume Shadow Copies
If SQPC ransomware did not initiate a permanent Shadow Volume Copies removal, give this software a try.
Emsisoft introduced Djvu ransomware victims an official and free-to-use decryption software, which can be downloaded here. Before running the too, make sure that the full SQPC removal has been performed.
Report it and recover your files
Report it
Report the attack even if you do not expect the files back: insurers and banks ask for the report number, and police use the contacts in the note to link cases.
- United States
- FBI IC3 · FTC ReportFraud
- United Kingdom
- Report Fraud (formerly Action Fraud) · NCSC
- Australia
- ReportCyber (ASD)
- EU countries
- Europol: national reporting sites
Give the victim ID, the note and the date the files were encrypted. A business that holds personal data may also have to notify its data protection authority, in the EU within 72 hours.
Protect the files you restore
Restore only after the scans are clean and the PC no longer shows files that end in .sqpc and no longer open; otherwise the restored copies can be damaged again.
Then build a backup that survives the next infection:
- one copy in the cloud with version history
- one on an external drive that is disconnected between backups
- the working copy on the PC
Version history matters because a backup that syncs damaged files overwrites the good ones.
How to do this with the tools built into Windows: the 3-2-1 backup rule on Windows.
Protect your privacy - employ a VPN
There are several ways how to make your online time more private - you can access an incognito tab.
However, there is no secret that even in this mode, you are tracked for advertising purposes. There is a way to add an extra layer of protection and create a completely anonymous web browsing practice with the help of VPN. This software reroutes traffic through different servers, thus leaving your IP address and geolocation in disguise.
Besides, it is based on a strict no-log policy, meaning that no data will be recorded, leaked, and available for both first and third parties. The combination of a secure web browser and VPN will let you browse the Internet without a feeling of being spied or targeted by criminals.
No backups? No problem. Use a data recovery tool
If you wonder how data loss can occur, you should not look any further for answers - human errors, malware attacks, hardware failures, power cuts, natural disasters, or even simple negligence.
In some cases, lost files are extremely important, and many straight out panic when such an unfortunate course of events happen. Due to this, you should always ensure that you prepare proper data backups on a regular basis.
If you were caught by surprise and did not have any backups to restore your files from, not everything is lost. is one of the leading file recovery solutions you can find on the market - it is likely to restore even lost emails or data located on an external device.
Questions about Sqpc ransomware
Is there a decryptor for .sqpc files?
That depends on the family behind the .sqpc extension, which this guide cannot confirm yet from the reports alone. Check No More Ransom and ID Ransomware with your ransom note and one encrypted file; they list families with free tools.
If none exists today, keep the encrypted files and a copy of the note on a separate drive, because decryptors are sometimes published months later after flaws are found or servers are seized. Never buy a decryptor from a website that is not the security company that made it.
Should I pay the ransom in _readme.txt?
Not before you have tried everything else. Identify the family from _readme.txt and one encrypted file, check No More Ransom for a free decryptor, and look for clean copies in OneDrive, backups and Previous Versions.
Paying funds further attacks, may be illegal if the group is sanctioned, and is no promise of a working key: many victims get partial or broken decryption. If you consider paying for business-critical data, involve the police and a professional incident responder first, and never pay through intermediaries who promise their own decryption.
How do I open .sqpc files?
You cannot open them by renaming or by choosing another program. The .sqpc ending shows that Sqpc ransomware encrypted the content, and only the matching key can reverse it. Renaming a file back to .docx or .jpg changes nothing except the icon, and it can confuse a future decryptor, so leave the names as they are.
To get the content back, use a backup, an unencrypted copy elsewhere, or a decryptor listed on No More Ransom if one exists for Sqpc ransomware. Store the encrypted files on an external disk until then.
Can a data-recovery company decrypt my files for a fee?
Only if a decryptor already exists or the company pays the attackers for you. Some "ransomware recovery" services advertise that they can decrypt families with no known flaw; in practice they negotiate with the attackers and add their own fee. Others use the same free tools listed on No More Ransom.
Before you hire anyone, ask in writing how they will recover the files, whether they will contact the attackers and what happens if they fail. A legitimate service answers clearly. If a free decryptor exists for your family, you can run it yourself.
How did Sqpc ransomware get on my computer?
The way Sqpc ransomware spreads has not been documented yet, so look at your own recent activity. On home PCs, ransomware most often comes with cracked programs, game cheats, key generators and fake updates, or with an e-mail attachment that was opened. On business networks, attackers usually log in through Remote Desktop with a stolen or guessed password.
Think back to what was downloaded or installed in the days before files that end in .sqpc and no longer open, and check the Downloads folder and Installed apps sorted by date. Keep anything suspicious for your report, but do not run it again.
Did Sqpc ransomware steal my files or passwords?
We do not know yet. Nothing published so far shows data theft by Sqpc ransomware, but the only confirmed sign is files that end in .sqpc and no longer open, which says nothing about what happened before. Many current ransomware attacks copy files or run a password stealer first, so it is wise to act as if they did.
From a clean device, change the passwords that were saved in the browsers on this PC, starting with e-mail and banking, sign out of all sessions and turn on two-step verification. Watch bank statements and account activity for the next few weeks.
Is Sqpc ransomware the same as other ransomware with a similar name?
Not necessarily. Ransomware names come from the file extension, the note or a word in the code, so unrelated families often end up with similar names, and one family can appear under several names. The difference matters: a decryptor or advice for one family does not fit another and can damage files.
Compare the ending added to your files and the exact name of the note with the summary table at the top of this guide, then upload the note and one encrypted file to ID Ransomware from a clean device. If the result names another family, follow the guide for that family instead.
What does _readme.txt tell me about the ransomware?
Quite a lot. The file name _readme.txt, the wording, the contact addresses and the format of the personal ID are typical for each family. Uploading the note together with one encrypted file to ID Ransomware or No More Ransom's Crypto Sheriff usually names the family within seconds.
That name decides your options: some families have free decryptors, some can be partially recovered, and some cannot be decrypted at all. The note's claims about stolen data should be taken seriously but not at face value.
Will .sqpc spread to my other drives?
It can. Ransomware encrypts every drive and network share it can reach while it runs, so external disks, USB sticks and shared folders connected during the attack may also have files ending in .sqpc. Disconnect everything now, then check each device from a clean computer.
Do not plug a backup drive into the infected PC until the ransomware has been removed with an offline scan. Cloud folders such as OneDrive sync the encrypted versions, but they keep earlier versions you can usually restore.
Will Fortect remove Sqpc ransomware?
Fortect scans Windows for malware and unwanted programs and repairs the system files and settings they change, and its free scan shows what it finds on your PC before you decide anything.
For Sqpc ransomware, follow the plan above as well: the browser steps take back permissions and settings that no scanner treats as a threat, and uninstalling the program that brought it removes the source.
Run Microsoft Defender's full scan and, if anything was found, its offline scan as a second opinion. If the symptoms are gone after the plan and both scans are clean, there is nothing more to do.
Sources
- Reddit: Ransomware: News, Prevention, Decryption, and Analysis (read October 6, 2026)
- Emsisoft: Free Ransomware Decryption Tools (read October 6, 2026)
- CISA: StopRansomware (read October 6, 2026)
- No More Ransom (read October 6, 2026)
- FTC: How to recognize, remove and avoid malware (read October 6, 2026)