STOP Ransomware Removal Guide (STOP Ransomware Remove)

  Category:  RANSOMWARE | 2nd July 2026 | Author:  CSI'S TEAM

STOP Ransomware Is A Widespread File-encrypting Malware Family That Targets Windows-based Systems And Prevents Users From Accessing Their Personal And Business Data. Once Executed On A Victim's Device, The Ransomware Encrypts A Wide Range Of File Types, Including Documents, Images, Videos, Databases, Archives, And Other Valuable Files. After The Encryption Process Is Completed, The Malware Demands A Ransom Payment In Exchange For A Decryption Key That Allegedly Restores Access To The Affected Files.

The STOP Ransomware Family Has Evolved Significantly Over Time And Has Appeared In Multiple Variants. It Is Commonly Distributed Through Malicious Email Attachments, Cracked Software, Fake Software Updates, Pirated Applications, Key Generators, Malicious Advertisements, Compromised Websites, And Exploit Kits. Cybercriminals Frequently Update The Ransomware To Evade Detection And Increase Infection Rates.

How STOP Ransomware Works?

When A User Unknowingly Executes The Malicious File, STOP Ransomware Begins A Series Of Actions Designed To Compromise The System And Encrypt Data. Initially, It May Gather System Information And Establish Persistence Mechanisms To Ensure It Remains Active After A System Reboot. The Malware Then Scans Local Drives, Removable Storage Devices, And Sometimes Network-connected Locations For Files That Match Its Target Criteria.

The Ransomware Uses Strong Encryption Algorithms To Lock Files, Making Them Inaccessible Without The Corresponding Decryption Key. During The Encryption Process, Original Files Remain On The System But Become Unusable Because Their Contents Are Encrypted. After Encrypting Files, The Malware Creates A Ransom Note That Instructs Victims On How To Contact The Attackers And Submit Payment, Typically In Cryptocurrency.

Victims Are Warned Not To Rename Encrypted Files Or Attempt Unauthorized Recovery Methods, As The Attackers Claim Such Actions Could Permanently Damage The Data. However, Paying The Ransom Does Not Guarantee Successful File Recovery And May Encourage Further Criminal Activity.

Appended File Extension

One Of The Most Recognizable Indicators Of A STOP Ransomware Infection Is The Addition Of A Unique File Extension To Encrypted Files. Different Variants Of The STOP Family Use Different Extensions.

Some Commonly Observed Extensions Associated With STOP Ransomware Include:

• .djvu

• .djvuu

• .udjvu

• .tro

• .rumba

• .promorad

• .gero

• .hese

• .puma

• .moka

• .nols

• .reco

• .bora

• .karl

• .peet

• .seto

• .mado

• .npph

• .codnat

• .coharos

• .todarius

• .kuus

• .lokf

• .nesa

• .vawe

For Example, A File Originally Named invoice.xlsx May Be Renamed To invoice.xlsx.djvu After Encryption. The Specific Extension Often Helps Security Researchers Identify The Ransomware Variant Involved In The Attack.

Infected Files

STOP Ransomware Targets A Broad Range Of File Types That Are Likely To Contain Valuable Information.

Commonly Affected Files Include:

Documents

• .doc

• .docx

• .xls

• .xlsx

• .ppt

• .pptx

• .pdf

• .txt

• .rtf

Images And Graphics

• .jpg

• .jpeg

• .png

• .gif

• .bmp

• .tiff

• .psd

• .svg

Audio And Video Files

• .mp3

• .wav

• .aac

• .mp4

• .avi

• .mov

• .mkv

Archives And Backups

• .zip

• .rar

• .7z

• .tar

• .bak

Databases

• .sql

• .db

• .mdb

• .sqlite

Development And Configuration Files

• .php

• .java

• .cpp

• .xml

• .json

• .config

System-critical Files Required For Windows Operation Are Often Excluded To Ensure The Operating System Remains Functional And Victims Can View Ransom Instructions.

Targeted Browsers

While STOP Ransomware Primarily Focuses On File Encryption, Some Variants And Associated Malware Components May Attempt To Collect Information Stored In Web Browsers.

Browsers Commonly Found On Infected Systems Include:

• Google Chrome

• Microsoft Edge

• Mozilla Firefox

• Opera

• Brave Browser

• Internet Explorer

Cybercriminals May Deploy Information-stealing Malware Alongside STOP Ransomware To Harvest Saved Passwords, Browsing Data, Cookies, Autofill Information, Cryptocurrency Wallet Credentials, And Other Sensitive Information Stored Within These Browsers.

Affected Operating Systems

STOP Ransomware Primarily Targets Microsoft Windows Operating Systems. Known Affected Versions Include:

• Windows 7

• Windows 8

• Windows 8.1

• Windows 10

• Windows 11

• Windows Server Environments

The Ransomware Is Designed Specifically For Windows Architecture And Generally Does Not Target Linux Or MacOS Systems Directly. However, Files Stored On Shared Network Drives Accessible From Infected Windows Machines May Also Become Encrypted.

Indicators Of Compromise

Signs That A System May Be Infected With STOP Ransomware Include:

• Files Suddenly Becoming Inaccessible.

• Appearance Of Unfamiliar File Extensions.

• Presence Of Ransom Notes In Folders Containing Encrypted Files.

• Significant CPU Or Disk Activity During Encryption.

• Disabled Security Software Or Modified System Settings.

• Missing Backups Or Deleted Shadow Volume Copies.

Prevention And Mitigation

Organizations And Individuals Can Reduce The Risk Of STOP Ransomware Infection By Implementing Strong Cybersecurity Practices. Recommended Measures Include Maintaining Updated Operating Systems And Software, Using Reputable Endpoint Protection Solutions, Enabling Multi-factor Authentication, Restricting Administrative Privileges, Regularly Backing Up Important Data, And Educating Users About Phishing And Malicious Downloads.

Downloading Software Only From Trusted Sources Is Particularly Important, As Many STOP Ransomware Infections Originate From Pirated Software, Cracks, And Unofficial Installers. Regular Offline Or Cloud Backups Can Significantly Reduce The Impact Of A Ransomware Attack By Allowing Data Restoration Without Relying On Cybercriminals.

Conclusion

STOP Ransomware Remains One Of The Most Prevalent Ransomware Families Due To Its Numerous Variants, Extensive Distribution Methods, And Ability To Encrypt A Wide Range Of File Types. By Appending Distinctive File Extensions, Encrypting Valuable Data, And Demanding Ransom Payments, It Can Cause Significant Operational And Financial Disruption.

Understanding Its Behavior, Targeted Files, Affected Browsers, And Supported Operating Systems Helps Organizations And Individuals Improve Detection, Response, And Prevention Efforts Against This Persistent Cyber Threat.

Malware Removal Guide For PC

Malware Removal Guide For Web Browsers

Prevent Future Malware

Summary - Malware Removal Guide

Guide For VPN Uses

Malware Removal Guide – PC And Web Browser

PART 1: Remove Malware From Your PC (Windows)

Step 1: Boot Into Safe Mode

• Restart Your PC And Press F8 (or Shift + F8 For Some Systems) Before Windows Loads.

• Choose Safe Mode With Networking.

Safe Mode Prevents Most Malware From Loading.

Step 2: Uninstall Suspicious Programs

1. Press Win + R, Type appwiz.cpl, And Press Enter.

2. Sort By Install Date And Uninstall Unknown Or Recently Added Programs.

Step 3: Run A Malware Scan

Use A Trusted Anti-malware Tool:

Malwarebytes – https://www.malwarebytes.com

Screenshot Of Malwarebytes - Visit Links

Microsoft Defender – Built Into Windows 10/11

HitmanPro, ESET Online Scanner, Or Kaspersky Virus Removal Tool

ZoneAlarm Pro Antivirus + Firewall NextGen

VIPRE Antivirus - US And Others Countries, | India

VIPRE Antivirus - Mac

F-Secure Total - Global

Run A Full Scan And Delete/quarantine Detected Threats.

Step 4: Delete Temporary Files

1. Press Win + R, Type temp → Delete All Files.

2. Press Win + R, Type %temp% → Delete All Files.

3. Use Disk Cleanup: cleanmgr In The Run Dialog.

Step 5: Reset Hosts File

1. Go To: C:\Windows\System32\drivers\etc

2. Open hosts File With Notepad.

3. Replace With Default Content:

Step 6: Check Startup Programs

1. Press Ctrl + Shift + Esc → Open Task Manager

2. Go To Startup Tab

3. Disable Any Suspicious Entries.

Step 7: Reset Network Settings

1. Open Command Prompt As Administrator.

2. Run These Commands:

netsh Winsock Reset

netsh Int Ip Reset

ipconfig /flushdns

PART 2: Remove Malware From Web Browsers

? Common Signs Of Malware In Browser:

• Unwanted Homepage Or Search Engine

• Pop-ups Or Redirects

• Unknown Extensions Installed

Step 1: Remove Suspicious Extensions

For Chrome:

• Go To: chrome://extensions/

• Remove Anything Unfamiliar

For Firefox:

• Go To: about:addons → Extensions

• Remove Suspicious Add-ons

For Edge:

• Go To: edge://extensions/

• Uninstall Unknown Add-ons

Step 2: Reset Browser Settings

Chrome:

• Go To chrome://settings/reset → "Restore Settings To Their Original Defaults"

Firefox:

• Go To about:support → "Refresh Firefox"

Edge:

• Go To edge://settings/resetProfileSettings → "Reset Settings"

Step 3: Clear Cache And Cookies

All Browsers:

• Use Ctrl + Shift + Del → Select All Time

• Clear Cookies, Cached Files, And Site Data

Step 4: Check Search Engine & Homepage Settings

Make Sure They Are Not Hijacked.

• Chrome: chrome://settings/search

• Firefox: about:preferences#search

• Edge: edge://settings/search

Step 5: Use Browser Cleanup Tools (Optional)

• Chrome: chrome://settings/cleanup

• Use Malwarebytes Browser Guard For Real-time Browser Protection.

FINAL TIPS: Prevent Future Malware

• Always Download Software From Trusted Sources.

• Keep Windows, Browsers, And Antivirus Updated.

• Avoid Clicking Suspicious Links Or Ads.

• Use ad Blockers And reputable Antivirus Software.

• Backup Your Files Regularly.

Short Summary: Malware Removal Guide (PC & Web Browser)

To Remove Malware From Your Windows PC, Start By Booting Into Safe Mode, Uninstalling Suspicious Programs, And Scanning With Trusted Anti-malware Tools Like Malwarebytes. Clear Temporary Files, Reset Your Network Settings, And Check Startup Apps For Anything Unusual.

For web Browsers, Remove Unwanted Extensions, Reset Browser Settings, Clear Cache And Cookies, And Ensure Your Homepage And Search Engine Haven’t Been Hijacked. Use Cleanup Tools Like Chrome Cleanup Or Browser Guard For Added Protection.

?? Prevention Tips: Keep Software Updated, Avoid Suspicious Downloads, And Use Antivirus Protection Plus Browser Ad Blockers. Regular Backups Are Essential.

VPN - How To Use IT

1. Choose A Trusted VPN Provider

• Why It Matters: Not All VPNs Offer Malware Protection.

• What To Look For: Providers With built-in Malware/ad/tracker Blockers (e.g., NordVPN’s Threat Protection, ProtonVPN’s NetShield).

• Nord VPN
• Hide.me VPN

2. Enable Kill Switch

• Purpose: Prevents Data Leaks If Your VPN Connection Drops.

• Benefit: Ensures Your Real IP And Browsing Activity Aren’t Exposed To Malware-distributing Websites.

3. Use VPN With DNS Leak Protection

• Why It Matters: DNS Leaks Can Expose Your Online Activity To Attackers.

• Solution: Enable DNS Leak Protection In Your VPN Settings Or Use A Secure DNS Like Cloudflare (1.1.1.1).

4. Avoid Free VPNs

• Risk: Free VPNs Often Contain Malware, Sell User Data, Or Lack Security Features.

• Better Option: Use Reputable Paid VPNs That Offer security Audits And Transparent Privacy Policies.

5. Use VPN With Anti-Phishing Tools

• Some VPNs Block Known Phishing And Malicious Sites.

• Example: Surfshark’s CleanWeb, CyberGhost’s Content Blocker.

6. Keep Your VPN App Updated

• Reason: Security Patches Fix Known Vulnerabilities.

• Tip: Enable Auto-updates Or Check For Updates Weekly.

. Use VPN On All Devices

• Scope: Malware Can Enter Through Phones, Tablets, Or IoT Devices.

• Solution: Install VPN Apps On Every Internet-connected Device.

8. Don’t Rely On VPN Alone

• Fact: VPNs Do Not Remove Or Detect Malware On Your System.

• Complement It With:

  • Antivirus Software

  • Firewall

  • Browser Extensions For Script Blocking

9. Avoid Clicking Unknown Links While VPN Is On

• VPN Encrypts Traffic But Can’t Stop Malware From Executing If You Download Infected Files.

10. Use VPN With Split Tunneling Cautiously

• Split Tunneling Allows Certain Apps/sites To Bypass VPN.

• Tip: Never Exclude Browsers, Email Clients, Or Download Managers From VPN Tunneling.

Short Note - VPN Uses

A VPN (Virtual Private Network) Enhances Your Online Privacy By Encrypting Your Internet Traffic And Masking Your IP Address. It Protects Your Data On Public Wi-Fi, Hides Browsing Activity From Hackers And ISPs, And Helps Bypass Geo-restrictions. VPNs Also Add A Layer Of Defense Against Malware By Blocking Malicious Websites And Trackers When Using Advanced Features. However, A VPN Does Not Remove Existing Malware Or Act As Antivirus Software. For Full Protection, Combine VPN Use With Antivirus Tools, Regular Software Updates, And Cautious Browsing Habits. Always Choose A Reputable VPN Provider With Strong Security And Privacy Policies.