BuP1w (Ran$omClub) Ransomware

Warning: BuP1w (Ran$omClub) can encrypt your files and demand an extreme Bitcoin ransom

BuP1w, also known as Ran$omClub ransomware, is a file-encrypting malware strain that locks personal and business data, then pressures victims into paying a massive ransom. Once inside a system, it immediately begins encrypting files and dropping threatening messages designed to scare you into quick payment.

If your files suddenly won’t open and now carry a strange extension, you’re likely dealing with this ransomware. Here’s what you need to know — and what to do next.

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BuP1w (Ran$omClub) Ransomware Overview

Threat Type	Ransomware / File-encrypting malware
Encrypted File Extension	.BuP!w3
Ransom Note Filename	BuP1wDecryptor@.txt
Email Contact	ransomclub@yahoo.com
Detection Names	MSIL/Filecoder variants, Trojan-Ransom.MSIL.Agent, Win32:MalwareX-gen [Ransom], Generic.Ransom.Hiddentear variants
Symptoms	Files won’t open, extension changed to .BuP!w3, ransom note on desktop, wallpaper changed
Damage & Distribution Methods	Encrypts documents, images, databases; spreads via malicious email attachments, cracked software, fake installers, malicious ads
Danger Level	Severe
Removal Tool	SpyHunter

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How Did I Get Infected With BuP1w (Ran$omClub)?

BuP1w doesn’t magically appear. It relies on common infection tactics that trick users into launching it themselves.

The most frequent entry points include:

• Malicious email attachments disguised as invoices, shipping documents, or job offers
• Fake software updates and cracked programs downloaded from unofficial sources
• Trojanized installers bundled with pirated software
• Malvertising campaigns that trigger silent downloads
• Exploited vulnerabilities in outdated Windows software

Once the malicious file is executed, encryption begins almost instantly. There’s usually no visible warning until your files are already locked.

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What BuP1w (Ran$omClub) Ransomware Does to Your Files

After execution, BuP1w scans the system for commonly used file types — including documents, spreadsheets, photos, archives, and databases. It encrypts them using strong cryptographic routines and appends the .BuP!w3 extension.

For example:
project.xlsx → project.xlsx.BuP!w3

It also:

• Drops a ransom note named BuP1wDecryptor@.txt
• Changes the desktop wallpaper to display a warning
• Demands an extremely high Bitcoin payment
• Sets an aggressive deadline to increase panic

The ransom demand is unusually large — reportedly hundreds of thousands of dollars in Bitcoin — with threats of deleting the decryption key if payment isn’t made within 48 hours. These time limits are psychological pressure tactics.

Without backups, encrypted files cannot typically be restored unless a working decryptor becomes publicly available.

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Should You Be Worried About BuP1w (Ran$omClub)?

Yes — but don’t panic.

BuP1w is a serious ransomware infection that can result in permanent data loss if backups aren’t available. However, paying the ransom is rarely a good solution.

Here’s why:

• There’s no guarantee attackers will send a working decryptor
• You could become a repeat target after payment
• The money funds further criminal operations
• Some ransomware groups simply disappear after collecting payments

If you’re infected:

1. Disconnect the device from the internet and local networks immediately.
2. Do not delete encrypted files — they may be recoverable later.
3. Remove the ransomware using a reputable anti-malware solution.
4. Restore files from offline or cloud backups if available.

The priority is stopping the infection before it spreads to other devices or shared drives.

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Ransom Note Dropped by BuP1w (Ran$omClub)

The file BuP1wDecryptor@.txt contains the attacker’s instructions. It informs victims that their files have been encrypted and provides a Bitcoin wallet address for payment.

The message includes:

• A strict 48-hour deadline
• A claim that the ransom will increase dramatically after the deadline
• An email address (ransomclub@yahoo.com) for communication
• Warnings against using third-party recovery tools

Those warnings are meant to intimidate you. Removing the malware will not damage your files — encryption has already happened. The key issue is preventing further damage and securing the system.

Manual Ransomware Removal Guide

Warning: Manual removal is complex and risky. If not done correctly, it can lead to data loss or incomplete removal of ransomware. Only follow this method if you are an advanced user. If unsure, proceed with Method 2 (SpyHunter Removal Guide).

Step 1: Disconnect from the Internet

1. Unplug your Ethernet cable or disconnect Wi-Fi immediately to prevent further communication with the ransomware’s command and control (C2) servers.

Step 2: Boot into Safe Mode

For Windows Users:

1. For Windows 10, 11:
   • Press Windows + R, type msconfig, and hit Enter.
   • Go to the Boot tab.
   • Check Safe boot and select Network.
   • Click Apply and OK, then restart your PC.
2. For Windows 7, 8:
   • Restart your PC and press F8 repeatedly before Windows loads.
   • Select Safe Mode with Networking and press Enter.

For Mac Users:

1. Restart your Mac and immediately press and hold the Shift key.
2. Release the key once you see the Apple logo.
3. Your Mac will start in Safe Mode.

Step 3: Locate and Terminate Malicious Processes

For Windows Users:

1. Press Ctrl + Shift + Esc to open Task Manager.
2. Look for suspicious processes (e.g., unknown names, high CPU usage, or random letters).
3. Right-click on the process and select End Task.

For Mac Users:

1. Open Activity Monitor (Finder > Applications > Utilities > Activity Monitor).
2. Look for unusual processes.
3. Select the process and click Force Quit.

Step 4: Delete Malicious Files

For Windows Users:

1. Press Windows + R, type %temp%, and hit Enter.
2. Delete all files in the Temp folder.
3. Navigate to:
   • C:\Users\[Your Username]\AppData\Roaming
   • C:\Users\[Your Username]\AppData\Local
   • C:\Windows\System32
4. Look for suspicious files related to the ransomware (random file names, recently modified) and delete them.

For Mac Users:

1. Open Finder and go to Go > Go to Folder.
2. Type ~/Library/Application Support and delete suspicious folders.
3. Navigate to ~/Library/LaunchAgents and remove unknown .plist files.

Step 5: Remove Ransomware from Registry or System Settings

For Windows Users:

Warning: Incorrect changes in the Registry Editor can damage your system. Proceed with caution.

1. Press Windows + R, type regedit, and hit Enter.
2. Navigate to:
   • HKEY_CURRENT_USER\Software
   • HKEY_LOCAL_MACHINE\Software
3. Look for unfamiliar folders with random characters or ransomware-related names.
4. Right-click and select Delete.

For Mac Users:

1. Go to System Preferences > Users & Groups.
2. Click on Login Items and remove any suspicious startup items.
3. Navigate to ~/Library/Preferences and remove malicious .plist files.

Step 6: Restore System Using System Restore (Windows) or Time Machine (Mac)

For Windows Users:

1. Press Windows + R, type rstrui, and hit Enter.
2. Click Next, choose a restore point before the infection, and follow the prompts to restore your system.

For Mac Users:

1. Restart your Mac and hold Command + R to enter macOS Utilities.
2. Select Restore from Time Machine Backup.
3. Choose a backup prior to the ransomware infection and restore your system.

Step 7: Use a Decryption Tool (If Available)

• Visit No More Ransom (www.nomoreransom.org) and check if a decryption tool is available for your ransomware variant.

Step 8: Recover Files Using Backup

• If you have backups on an external drive or cloud storage, restore your files.

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Automatic Ransomware Removal Using SpyHunter

If manual removal seems too risky or complicated, using a reliable anti-malware tool like SpyHunter is the best alternative.

Step 1: Download SpyHunter

Download SpyHunter from the official link: Download SpyHunter

Or follow the official installation instructions here:
SpyHunter Download Instructions

Step 2: Install SpyHunter

1. Open the downloaded file (SpyHunter-Installer.exe).
2. Follow the on-screen prompts to install the program.
3. Once installed, launch SpyHunter.

Step 3: Perform a Full System Scan

1. Click on Start Scan Now.
2. SpyHunter will scan for ransomware and other malware.
3. Wait for the scan to complete.

Step 4: Remove Detected Threats

1. After the scan, SpyHunter will list all detected threats.
2. Click Fix Threats to remove the ransomware.

Step 5: Use SpyHunter’s Malware HelpDesk (If Needed)

If you are dealing with a stubborn ransomware variant, SpyHunter’s Malware HelpDesk provides custom fixes to remove advanced threats.

Step 6: Restore Your Files

If your files are encrypted:

• Try No More Ransom (www.nomoreransom.org) for decryption tools.
• Restore from cloud storage or external backups.

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Preventing Future Ransomware Attacks

• Keep backups on an external hard drive or cloud storage.
• Use SpyHunter to detect threats before they infect your system.
• Enable Windows Defender or a trusted antivirus program.
• Avoid suspicious emails, attachments, and links.
• Update Windows, macOS & software regularly.

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Conclusion

BuP1w (Ran$omClub) ransomware is a high-severity file-encrypting threat designed to extort victims with extreme ransom demands. If your files have the .BuP!w3 extension, act quickly but calmly.

Do not pay the ransom. Focus on:

• Isolating the infected device
• Removing the malware with a trusted security tool
• Restoring files from clean backups
• Strengthening security to prevent reinfection

The best defense against ransomware like BuP1w is regular offline backups, updated software, and strong endpoint protection.