Remove DEVMAN/yAGRTb Ransomware

DEVMAN, also identified as yAGRTb ransomware, is a recent and aggressive crypto-malware strain that encrypts victims’ files and threatens to leak stolen data unless a ransom is paid. This ransomware appends the .yAGRTb extension to all encrypted files and drops a ransom note titled README.yAGRTb.txt. Victims are instructed to contact the attackers via email or TOX chat to negotiate payment for data decryption and to prevent the public release of their data.

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DEVMAN/yAGRTb Ransomware Overview

Attribute	Details
Threat Type	Ransomware (Crypto-Ransomware)
Encrypted File Extension	.yAGRTb
Ransom Note Filename	README.yAGRTb.txt
Contact Email	devman@cyberfear.com
TOX Chat ID	Provided in the ransom note
Detection Names	Win32:MalwareX-gen [Misc], Trojan.GenericKD.76496264, A Variant Of Win32/Filecoder.OSW, HEUR:Trojan-Ransom.Win32.Generic, Ransom:Win32/DragonForce.SB!MTB
Symptoms of Infection	Files encrypted with .yAGRTb extension, ransom note present, desktop wallpaper changed, inability to open files
Damage & Distribution	Encrypts files and exfiltrates data; distributed via phishing emails, malicious attachments, pirated software, and compromised websites
Danger Level	High
Removal Tool	SpyHunter

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In-Depth Analysis of DEVMAN/yAGRTb Ransomware

How Did I Get Infected?

DEVMAN/yAGRTb ransomware typically spreads through several common infection vectors:

• Phishing Emails: Malicious attachments or embedded links disguised as legitimate communications.
• Pirated Software: Installation of cracked or unauthorized software that carries hidden ransomware payloads.
• Malicious Websites: Visiting compromised websites that exploit vulnerabilities to install the malware silently.
• Infected USB Devices: Using removable drives already compromised with the ransomware installer.

What Does It Do?

Once active on the system, DEVMAN/yAGRTb ransomware initiates several destructive actions:

1. Encrypts Files: Targets a wide range of file types, adding the .yAGRTb extension.
2. Drops a Ransom Note: Places README.yAGRTb.txt in affected folders with payment instructions.
3. Modifies Desktop Wallpaper: Changes it to display a ransom message prominently.
4. Threatens Data Exposure: Claims stolen files will be leaked publicly if the ransom is not paid.

Should You Be Worried?

Yes. DEVMAN/yAGRTb poses a serious threat. It utilizes both file encryption and extortion through data leak threats, putting not only personal but potentially sensitive business data at risk. Even if you pay, there is no assurance the criminals will uphold their promise to decrypt or delete the data. The best course of action is immediate removal and system remediation.

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Ransom Note Text

The ransom note left by the attackers (README.yAGRTb.txt) reads as follows:

“All your files have been encrypted and stolen using a strong algorithm. To recover your data, contact us via TOX or email at devman@cyberfear.com. We will provide proof by decrypting one file. After payment, we will delete the stolen data and provide a decryption tool. Do not shut down or reset your system, as this may damage your files. If you refuse to pay, your data will be published online, and the decryption tool will be destroyed.”

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

DEVMAN/yAGRTb is a severe ransomware threat capable of inflicting major damage by locking files and threatening data leaks. It spreads through common social engineering and software piracy vectors, making users vulnerable through everyday actions. Quick response is vital. Use a trusted malware removal solution like SpyHunter to eliminate the ransomware and begin the recovery process.